Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Dual voltage detector TQFN 48

General Description

The MAX16031/MAX16032 EEPROM-configurable sys-

tem monitors feature an integrated 10-bit analog-to-

digital converter (ADC) designed to monitor voltages,

temperatures, and current in complex systems. These

EEPROM-configurable devices allow enormous flexibility

in selecting operating ranges, upper and lower limits,

fault output configuration, and operating modes with

the capability of storing these values within the device.

The MAX16031 monitors up to eight voltages, three

temperatures (one internal/two external remote temper-

ature diodes), and a single current. The MAX16032

monitors up to six voltages and two temperatures (one

internal/one remote temperature diode). Each of these

monitored parameters is muxed into the ADC and writ-

ten to its respective register that can be read back

through the SMBus™ and JTAG interface.

Measured values are compared to the user-config-

urable upper and lower limits. For voltage measure-

ments, there are two undervoltage and two overvoltage

limits. For current and temperature, there are two sets

of upper limits. Whenever the measured value is out-

side its limits, an alert signal is generated to notify the

processor. Independent outputs are available for over-

current, overtemperature, and undervoltage/overvolt-

age that are configured to assert on assigned

channels. There are also undedicated fault outputs that

are configured to offer a secondary limit for tempera-

ture, current, or voltage fault or provide a separate

overvoltage output.

During a major fault event, such as a system shutdown,

the MAX16031/MAX16032 automatically copy the inter-

nal ADC registers into the nonvolatile EEPROM registers

that then are read back for diagnostic purposes.

The MAX16031/MAX16032 offer additional GPIOs that

are used for voltage sequencing, additional fault out-

puts, a manual reset input, or read/write logic levels. A

separate current-sense amplifier with an independent

output allows for fast shutoff during overcurrent condi-

tions. The MAX16031/MAX16032 are available in a

7mm x 7mm TQFN package and are fully specified

from -40°C to +85°C.

Applications

Servers Workstations

Storage Systems Networking

Telecom

Features

o Supply Voltage Operating Range of 2.85V to 14V

o Monitors Up to Eight Voltages (Single-Ended or

Pseudo-Differential) with 1% Accuracy

o EEPROM-Configurable Limits

Two Undervoltage and Two Overvoltage

Two Overtemperature

Two Overcurrent

o High-Side Current-Sense Amplifier with

Overcurrent Output (MAX16031 Only)

o Monitors Up to Three Temperatures

(1 Internal/2 Remote)

o Nonvolatile Fault Memory Stores Fault Conditions

for Later Retrieval

o Two Additional Configurable Fault Outputs

o Two Configurable GPIOs

o SMBus/I

C-Compatible Interface with ALERT

Output and Bus Timeout Function

o JTAG Interface

o 7mm x 7mm, 48-Pin TQFN Package

MAX16031/MAX16032

EEPROM-Based System Monitors

with Nonvolatile Fault Memory

________________________________________________________________

Maxim Integrated Products

IN1

N.C.

DXP1

DXN1

N.C. (DXP2)

N.C. (DXN2)

N.C. (CS+)

N.C. (CS-)

N.C.

13 14 15

16 17 18 19 20 21 22 23 24

GND

GPIO1

GPIO2

RBP

SDA

SCL

ALERT

OVERT

N.C. (OVERC)

FAULT2

ABP

GND

DBP

TDO

N.C.

TDI

TCK

TMS

RESET

FAULT1

( ) MAX16031 ONLY

IN2

IN3

IN4

N.C.

GND

IN5

IN6

N.C. (IN7)

N.C. (IN8)

MAX16031

MAX16032

TQFN

Pin Configuration

19-0870; Rev 4; 8/11

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX16031ETM+ -40°C to +85°C 48 TQFN-EP*

MAX16032ETM+ -40°C to +85°C 48 TQFN-EP*

SMBus is a trademark of Intel Corp.

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

Summary of content (41 pages)

PAGE 1
9-0870; Rev 4; 8/11 KIT ATION EVALU E L B AVAILA EEPROM-Based System Monitors with Nonvolatile Fault Memory Features The MAX16031/MAX16032 EEPROM-configurable system monitors feature an integrated 10-bit analog-todigital converter (ADC) designed to monitor voltages, temperatures, and current in complex systems.
PAGE 2
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 Selector Guide VOLTAGE MONITORS PART TEMPERATURE SENSORS CURRENTSENSE AMPS FAULT GPIOs OUTPUTS SINGLE ENDED DIFFERENTIAL INT EXT MAX16031ETM+ 8 4 1 2 1 4 2 MAX16032ETM+ 6 3 1 1 — 4 2 Typical Application Circuit 5V 5V DC-DC EN 1.5V 1.5V DC-DC 3.3V 3.3V DC-DC EN 1.2V 1.2V DC-DC 12V BUS 2.5V 2.5V DC-DC EN 0.9V 0.9V LINEAR 1.8V 1.8V DC-DC EN 3.
PAGE 3
EEPROM-Based System Monitors with Nonvolatile Fault Memory VCC to GND ............................................................-0.3V to +15V IN_, FAULT_, SCL, SDA, OVERT to GND.................-0.3V to +6V A0, A1, TCK, TMS, TDI to GND ................................-0.3V to +6V OVERC, RESET, GPIO_, ALERT to GND..................-0.3V to +6V RBP, ABP, DBP to GND ...-0.3V to lower of (6V and VCC + 0.3V) TDO, DXP1, DXP2 to GND..........................-0.3V to VDBP + 0.3V CS+, CS- to GND ..................
PAGE 4
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.9V to 14V, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 3.3V, TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS Percent of programmed threshold Input Hysteresis MIN TYP r5Ch[5] = 0 0.78 r5Ch[5] = 1 1.17 MAX UNITS % RESET OUTPUT Reset Timeout Period tRP r20h[5:3] = 000; from MR going high 22.5 25 27.5 r20h[5:3] = 001 2.25 2.5 2.
PAGE 5
EEPROM-Based System Monitors with Nonvolatile Fault Memory (VCC = 2.9V to 14V, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 3.3V, TA = +25°C.) (Note 1) PARAMETER SYMBOL Current-Sense Analog Input Range CONDITIONS VCS+ - VCS- A=6 MIN TYP 232 A = 12 116 A = 24 58 A = 48 ADC Current-Sense Measurement Accuracy Common-Mode Rejection Ratio Power-Supply Rejection Ratio CMRRCS 29 -4 ±0.2 +4 VSENSE = 50mV (A = 6, 12 only) -10 ±1.
PAGE 6
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.9V to 14V, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 3.3V, TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 400 kHz SMBus TIMING (see Figure 1) Serial-Clock Frequency fSCL Bus Free Time Between STOP and START Conditions tBUF 1.3 µs START Condition Setup Time tSU:STA 0.6 µs START Condition Hold Time tHD:STA 0.
PAGE 7
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 SDA tBUF tSU:DAT tSU:STA tHD:DAT tLOW tHD:STA tSU:STO SCL tHIGH tHD:STA tR tF START CONDITION STOP CONDITION REPEATED START CONDITION START CONDITION Figure 1. SMBus Interface Timing Diagram t1 t2 t3 TCK t4 t5 TDI, TMS t6 t7 TDO TRI-STATE ONLY Figure 2.
PAGE 8
Typical Operating Characteristics (Typical values are at VCC = 3.3V, TA = +25°C, unless otherwise noted.) NORMALIZED IN_ THRESHOLD vs. TEMPERATURE TA = -40°C 1.5 1.0 1.01 1.00 0.99 0.5 0.98 0 0.97 MAX16031 toc03 1.02 1.05 NORMALIZED RESET TIMEOUT PERIOD ICC (mA) 2.0 NORMALIZED RESET TIMEOUT PERIOD vs. TEMPERATURE MAX16031 toc02 TA = +85°C TA = +25°C 2.5 1.03 NORMALIZED IN_ THRESHOLD 3.0 MAX16031 toc01 VCC SUPPLY CURRENT vs. VCC SUPPLY VOLTAGE 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.
PAGE 9
EEPROM-Based System Monitors with Nonvolatile Fault Memory 0 -1 4 3 2 1 0 -1 -2 TEMPERATURE ERROR (°C) 1 MAX16031 toc10 2 5 TEMPERATURE ERROR (°C) MAX16031 toc09 -3 -2 -4 -3 -5 -10 15 40 90 65 0 15 30 45 60 75 100 10 CURRENT-SENSE ACCURACY vs. VSENSE CURRENT-SENSE PRIMARY THRESHOLD vs.
PAGE 10
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Pin Description PIN MAX16031 1 2 MAX16032 1 2 NAME FUNCTION IN2 Supply Monitor Input 2. IN2 is internally sampled by the ADC. It is configurable for unipolar/ bipolar and single-ended/pseudo-differential. In pseudo-differential mode, IN1 and IN2 form the + and - of the differential pair. Each input must stay within the specified ADC IN_ voltage range. IN3 Supply Monitor Input 3. IN3 is internally sampled by the ADC.
PAGE 11
EEPROM-Based System Monitors with Nonvolatile Fault Memory PIN MAX16031 MAX16032 NAME FUNCTION 21 21 ALERT SMBus Alert Open-Drain Output. ALERT follows the SMBALERT# signal functionality described in Appendix A of the SMBus 2.0 Specification. ALERT asserts when the device detects a fault, thereby interrupting the host processor to query which device on the serial bus detected faults. 22 22 OVERT Overtemperature, Open-Drain Output. OVERT asserts when an overtemperature condition is detected.
PAGE 12
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 Functional Diagram VCC INTERNAL TEMPERATURE SENSOR CIRCUITRY OSCILLATOR IN1 10-BIT ADC ANALOG REGULATOR ABP DIGITAL REGULATOR DBP 1.
PAGE 13
EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTER ADDRESS EEPROM MEMORY ADDRESS READ/ WRITE 00h — R IN1 ADC Result Register (MSB) 01h — R IN1 ADC Result Register (LSB) 02h — R IN2 ADC Result Register (MSB) 03h — R IN2 ADC Result Register (LSB) 04h — R IN3 ADC Result Register (MSB) 05h — R IN3 ADC Result Register (LSB) 06h — R IN4 ADC Result Register (MSB) 07h — R IN4 ADC Result Register (LSB) 08h — R IN5 ADC Result Register (MSB) 09h — R IN5 ADC Re
PAGE 14
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 1.
PAGE 15
EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTER ADDRESS EEPROM MEMORY ADDRESS READ/ WRITE DESCRIPTION 4Bh CBh R/W Remote Temperature Sensor 2 Secondary Overtemperature Threshold 4Ch CCh R/W Overcurrent Secondary Threshold 4Dh CDh R/W Remote Temperature Sensor Primary/Secondary Overtemperature Threshold (LSBs).
PAGE 16
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Detailed Description Getting Started The MAX16031/MAX16032 contain both I2C/SMBus and JTAG serial interfaces for accessing registers and EEPROM. Use only one interface at any given time. For more information on how to access the internal memory through these interfaces, see the I2C/SMBus-Compatible Serial Interface and JTAG Serial Interface sections.
PAGE 17
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 Table 2. Input Monitor Ranges and Enables (continued) REGISTER ADDRESS 18h 1Ah EEPROM MEMORY ADDRESS BIT RANGE DESCRIPTION [1:0] IN5 Voltage Range Selection: 00 = 5.6V, 01 = 2.8V 10 = 1.4V, 11 = Reserved [3:2] IN6 Voltage Range Selection: 00 = 5.6V, 01 = 2.8V 10 = 1.4V, 11 = Reserved [5:4] IN7 Voltage Range Selection: 00 = 5.6V, 01 = 2.8V 10 = 1.4V, 11 = Reserved [7:6] IN8 Voltage Range Selection: 00 = 5.6V, 01 = 2.
PAGE 18
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory a -1V differential input (range of 5.6V) gives a decimal code of -183, which is 1101001001 in two’s complement binary form. In single-ended mode, conversions are performed between a single input and ground. When single-ended mode is selected, conversions are always unipolar regardless of r1Ch[7:4]. The singleended and pseudo-differential ADC mode equations are shown below.
PAGE 19
EEPROM-Based System Monitors with Nonvolatile Fault Memory ITH = VCSTH RSENSE where ITH is the current threshold to be set, VCSTH is the threshold set by r19h[1:0], and RSENSE is the value VMON CS+ CS- RSENSE - TO ADC MUX of the sense resistor. See Table 4 for a description of r19h.
PAGE 20
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 5. Temperature Data Format ABP IHIGH ILOW DXP_ - TO ADC MUX + VBIAS ~ 100mV DXN_ IBIAS ABP TEMPERATURE (°C) DIGITAL CODE +128 1100000000 +125 1011111010 +100 1011010000 +25.5 1000110011 0 1000000000 -10 0111101100 -75 0101101010 -100 0100111000 -128 0100000000 Diode fault 0000000000 Reading ADC Results Figure 4.
PAGE 21
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 Table 6.
PAGE 22
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 7.
PAGE 23
EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTER ADDRESS 1Dh 1Eh 1Fh EEPROM MEMORY ADDRESS 9Dh 9Eh 9Fh BIT RANGE DESCRIPTION [0] 1 = FAULT1 depends on the secondary undervoltage thresholds of all enabled IN1–IN8. [1] 1 = FAULT1 depends on the primary overvoltage thresholds of all enabled IN1–IN8. [2] 1 = FAULT1 depends on the secondary overvoltage thresholds of all enabled IN1–IN8.
PAGE 24
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 8. Output Dependencies (continued) REGISTER ADDRESS 1Fh 20h 24 EEPROM MEMORY ADDRESS 9Fh BIT RANGE DESCRIPTION [3] 1 = OVERT depends on the diode short flag of remote temperature sensor 1. OVERT latches when the diode is shorted. Clear the latch by writing to r50h. [4] 1 = OVERT depends on the diode open flag of remote temperature sensor 1. OVERT latches when the diode is open. Clear the latch by writing to r50h.
PAGE 25
EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTER ADDRESS 21h 22h EEPROM MEMORY ADDRESS A1h BIT RANGE DESCRIPTION [0] 1 = RESET depends on IN1 with thresholds defined by r20h[2:0]. [1] 1 = RESET depends on IN2 with thresholds defined by r20h[2:0]. [2] 1 = RESET depends on IN3 with thresholds defined by r20h[2:0]. [3] 1 = RESET depends on IN4 with thresholds defined by r20h[2:0]. [4] 1 = RESET depends on IN5 with thresholds defined by r20h[2:0].
PAGE 26
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 8. Output Dependencies (continued) REGISTER ADDRESS 23h 24h 26 EEPROM MEMORY ADDRESS A3h BIT RANGE DESCRIPTION [0] 1 = GPIO1 depends on the secondary undervoltage thresholds of all enabled IN1–IN8. [1] 1 = GPIO1 depends on the primary overvoltage thresholds of all enabled IN1–IN8. [2] 1 = GPIO1 depends on the secondary overvoltage thresholds of all enabled IN1–IN8.
PAGE 27
EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTER ADDRESS 25h EEPROM MEMORY ADDRESS BIT RANGE A5h DESCRIPTION [0] 1 = GPIO2 depends on the secondary undervoltage thresholds of all enabled IN1–IN8. [1] 1 = GPIO2 depends on the primary overvoltage thresholds of all enabled IN1–IN8. [2] 1 = GPIO2 depends on the secondary overvoltage thresholds of all enabled IN1–IN8. [3] 1 = GPIO2 depends on the secondary overtemperature threshold of the internal temperature sensor.
PAGE 28
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 9.
PAGE 29
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 Table 10. Fault Masks REGISTER ADDRESS 54h EEPROM MEMORY ADDRESS D4h BIT RANGE [0] 1 = Short-circuit detection at remote temperature sensor 1 is masked. [1] 1 = Open-circuit detection at remote temperature sensor 1 is masked. [2] 1 = Short-circuit detection at remote temperature sensor 2 is masked. [3] 1 = Open-circuit detection at remote temperature sensor 2 is masked.
PAGE 30
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 11. Fault Flags REGISTER ADDRESS 50h EEPROM MEMORY ADDRESS D0h BIT RANGE [0] 1 = Short circuit detected at remote temperature sensor 1. [1] 1 = Open circuit detected at remote temperature sensor 1. [2] 1 = Short circuit detected at remote temperature sensor 2. [3] 1 = Open circuit detected at remote temperature sensor 2. [7:4] 51h 52h 53h 30 D1h D2h D3h DESCRIPTION Not used.
PAGE 31
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 Table 12. Fault Log Dependency REGISTER ADDRESS 58h 59h 5Ah EEPROM BIT MEMORY RANGE ADDRESS D8h D9h DAh DESCRIPTION [0] 1 = Fault log triggered when IN1 is below its primary undervoltage threshold. [1] 1 = Fault log triggered when IN2 is below its primary undervoltage threshold. [2] 1 = Fault log triggered when IN3 is below its primary undervoltage threshold.
PAGE 32
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 13. Fault Log EEPROM REGISTER ADDRESS EEPROM MEMORY ADDRESS BIT RANGE — 80h [7:0] Copy of r51h[7:0] at the time the fault log was triggered. — 81h [7:0] Copy of r52h[7:0] at the time the fault log was triggered. — 82h [7:0] Copy of r53h[7:0] at the time the fault log was triggered. — 83h [7:0] IN1 conversion result at the time the fault log was triggered.
PAGE 33
EEPROM-Based System Monitors with Nonvolatile Fault Memory S ADDRESS 7 bits Receive Byte Format R/W ACK 0 COMMAND ACK P ADDRESS S 8 bits Slave Address: Address of the slave on the serial interface bus. ADDRESS 7 bits R/W ACK 7 bits DATA 1 NACK P 8 bits Slave Address: Address of the slave on the serial interface bus. Command Byte: Presets the internal address pointer or represents a command.
PAGE 34
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 14. Miscellaneous Settings REGISTER ADDRESS EEPROM MEMORY ADDRESS BIT RANGE [3:0] 5Bh DBh [6:4] [7] [1:0] 5Ch DCh [2] [4:3] 5Ch 34 DESCRIPTION Postboot Timeout (all faults and outputs masked): 0h = No timeout 1h = 0.974ms 2h = 2.030ms 3h = 3.978ms 4h = 8.038ms 5h = 15.99ms 6h = 31.99ms 7h = 63.99ms 8h = 128ms 9h = 256.
PAGE 35
EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTER ADDRESS EEPROM MEMORY ADDRESS BIT RANGE 5Eh DEh [7:0] [0] 5Fh DFh [1] [7:2] DESCRIPTION Firmware Version. 8 bits of memory for user-defined firmware version number. Configuration Lock: Write a ‘1’ to r5Fh[0] to toggle this register bit. 0 = Register and EEPROM configuration unlocked. 1 = Register and EEPROM configuration locked.
PAGE 36
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory REGISTERS AND EEPROM 01101 01100 MEMORY WRITE REGISTER [LENGTH = 8 BITS] 01010 MEMORY READ REGISTER [LENGTH = 8 BITS] 01001 MEMORY ADDRESS REGISTER [LENGTH = 8 BITS] 01000 BOUNDARY SCAN REGISTER [LENGTH = 198 BITS] 00001 00010 USER CODE REGISTER [LENGTH = 32 BITS] 00100 IDENTIFICATION REGISTER [LENGTH = 32 BITS] 00000 BYPASS REGISTER [LENGTH = 1 BIT] 11111 MUX 1 COMMAND DECODER 01101 01100 SAVE REBOOT VDBP INSTRUC
PAGE 37
EEPROM-Based System Monitors with Nonvolatile Fault Memory MAX16031/MAX16032 1 TEST-LOGIC-RESET 0 0 RUN-TEST/IDLE 1 SELECT-DR-SCAN 1 SELECT-IR-SCAN 0 1 0 1 CAPTURE-DR CAPTURE-IR 0 0 SHIFT-DR 1 1 EXIT1-DR 1 EXIT1-IR 0 0 PAUSE-DR PAUSE-IR 0 1 0 1 0 EXIT2-DR EXIT2-IR 1 1 UPDATE-DR 1 0 SHIFT-IR 0 1 0 1 UPDATE-IR 0 1 0 Figure 7. TAP Controller State Diagram Exit2-DR: A rising edge on TCK with TMS high while in this state puts the controller in the update-DR state.
PAGE 38
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Exit1-IR: A rising edge on TCK with TMS low puts the controller in the pause-IR state. If TMS is high on the rising edge of TCK, the controller enters the update-IR state. Pause-IR: Shifting of the instruction shift register is halted temporarily. With TMS high, a rising edge on TCK puts the controller in the exit2-IR state. The controller remains in the pause-IR state if TMS is low during a rising edge on TCK.
PAGE 39
EEPROM-Based System Monitors with Nonvolatile Fault Memory MSB LSB Version (4 bits) Device ID (16 bits) Manufacturer ID (11 bits) Fixed value (1 bit) 0000 0000000000000001 00011001011 1 Table 18. 32-Bit User-Code Data MSB D.C. (don’t cares) I2C/SMBus Slave Address User identification (firmware version) 00000000000000000 See Table 15 r5Eh[7:0] contents USERCODE: When the USERCODE instruction is latched into the parallel instruction register, the usercode data register is selected.
PAGE 40
MAX16031/MAX16032 EEPROM-Based System Monitors with Nonvolatile Fault Memory Table 20. Address Pin State Decode Table 19. Boundary Cell Order 40 BOUNDARY CELL NO.
PAGE 41
EEPROM-Based System Monitors with Nonvolatile Fault Memory PAGES CHANGED REVISION NUMBER REVISION DATE 0 7/07 1 10/07 Revised the Ordering Information 1 2 6/10 Revised the Pin Description 11 3 9/10 Changed the minimum reference voltage specification in the Electrical Characteristics section 3 4 8/11 Revised the Current Monitoring section and Table 6 DESCRIPTION Initial release — 19, 21 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied i