Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Serialiser uDFN 6

General Description

The MAX6895–MAX6899 is a family of small, low-pow-

er, voltage-monitoring circuits with sequencing

capability. These miniature devices offer tremendous

flexibility with an adjustable threshold capable of monitor-

ing down to 0.5V and an external capacitor-adjustable time

delay. These devices are ideal for use in power-supply

sequencing, reset sequencing, and power-switching

applications. Multiple devices can be cascaded for complex

sequencing applications.

A high-impedance input with a 0.5V threshold allows an

external resistive divider to set the monitored threshold.

The output asserts (OUT = high or OUT = low) when

the input voltage rises above the 0.5V threshold and

the enable input is asserted (ENABLE = high or

ENABLE = low). When the voltage at the input falls

below 0.5V or when the enable input is deassert-

ed (ENABLE = low or ENABLE = high), the output

deasserts (OUT = low or OUT = high). All devices

provide a capacitor-programmable delay time from when

the input rises above 0.5V to when the output is assert-

ed. The MAX689_A versions provide the same capaci-

tor-adjustable delay from when enable is asserted to

when the output asserts. The MAX689_P devices have

a 1µs propagation delay from when enable is asserted

to when the output asserts.

The MAX6895A/P offers an active-high enable input

and an active-high push-pull output. The MAX6896A/P

offers an active-low enable input and an active-low

push-pull output. The MAX6897A/P offers an active-

high enable input and an active-high open-drain

out-put. Finally, the MAX6898A/P offers an active-low

enable input and an active-low open-drain output. The

MAX6899A/P offers an active-low enable with an active-

high push-pull output.

All devices operate from a 1.5V to 5.5V supply volt-

age and are fully specified over the -40°C to +125°C

operating temperature range. These devices are

available in ultra-small 6-pin µDFN (1.0mm x 1.5mm) and

thin SOT23 (1.60mm x 2.90mm) packages.

Applications

Features

● 1.8% Accurate Adjustable Threshold Over

Temperature

● Operate from V

of 1.5V to 5.5V

● Capacitor-Adjustable Delay

● Active-High/-Low Enable Input Options

● Active-High/-Low Output Options

● Open-Drain (28V Tolerant)/Push-Pull Output

Options

● Low Supply Current (10µA, typ)

● Fully Specified from -40°C to +125°C

● Ultra-Small 6-Pin µDFN Package or Thin SOT23

Package

● Automotive

● Medical Equipment

● Intelligent Instruments

● Portable Equipment

● Computers/Servers

● Critical µP Monitoring

● Set-Top Boxes

● Telecom

19-3673; Rev 10; 3/14

Note: All devices are specified over the -40°C to +125°C

operating temperature range.

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

/V denotes an automotive qualified part; T = Tape and reel.

Typical Operating Circuit and Selector Guide appear at end

of data sheet.

Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.

PART PIN-PACKAGE TOP MARK

MAX6895AALT+ 6 µDFN +AW

MAX6895AAZT+ 6 Thin SOT23 +AADK

MAX6895PALT+T 6 µDFN +AX

MAX6895PAZT+ 6 Thin SOT23 +AADL

MAX6896AALT+ 6 µDFN +AY

MAX6896AAZT+ 6 Thin SOT23 +AADO

MAX6896AAZT/V+T 6 Thin SOT23 +AATA

MAX6896PALT+T 6 µDFN +AZ

MAX6896PAZT+ 6 Thin SOT23 +AADP

MAX6896PAZT/V+T 6 Thin SOT23 —

1 2 3

6 5 4

OUT

( ) FOR MAX6899 ONLY.

CDELAY

ENABLE

(ENABLE)

INGND

MAX6895

MAX6897

MAX6899

µDFN

TOP VIEW

MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/

Supervisory Circuits

Pin Congurations

Ordering Information

Summary of content (15 pages)

PAGE 1
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits General Description Features The MAX6895–MAX6899 is a family of small, low-power, voltage-monitoring circuits with sequencing capability. These miniature devices offer tremendous flexibility with an adjustable threshold capable of monitoring down to 0.5V and an external capacitor-adjustable time delay. These devices are ideal for use in power-supply sequencing, reset sequencing, and power-switching applications.
PAGE 2
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Absolute Maximum Ratings VCC, ENABLE, ENABLE, IN....................................-0.3V to +6V OUT, OUT (push-pull)................................ -0.3V to (VCC + 0.3V) OUT, OUT (open-drain)..........................................-0.3V to +30V CDELAY.................................................... -0.3V to (VCC + 0.3V) Output Current (all pins)....................................................
PAGE 3
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Electrical Characteristics (continued) (VCC = 1.5V to 5.5V, TA = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V and TA = +25°C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUT/OUT Output Low Voltage (Open-Drain or Push-Pull) Output High Voltage (Push-Pull) Output Open-Drain Leakage Current VOL VOH ILKG VCC ≥ 1.
PAGE 4
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Typical Operating Characteristics VCC = 5V 0.5006 8 VTH (V) VCC = 3V 10 VCC = 1.5V 0.5002 0.5000 0.4998 0.4996 4 0.4994 2 0.4992 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 -40 -25 -10 5 20 35 50 65 80 95 110 125 0.4990 -40 -25 -10 5 20 35 50 65 80 95 110 125 VCC (V) TEMPERATURE (°C) TEMPERATURE (C) OUT DELAY vs. CCDELAY OUTPUT LOW VOLTAGE vs. SINK CURRENT OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT VCC = 1.
PAGE 5
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Pin Description PIN MAX6895/ MAX6897 µDFN 1 THIN SOT23 1 MAX6896/ MAX6898 µDFN — THIN SOT23 — MAX6899 µDFN — NAME FUNCTION ENABLE Active-High Logic-Enable Input. Drive ENABLE low to immediately deassert the output to its false state (OUT = low or OUT = high) independent of VIN.
PAGE 6
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Table 1. MAX6895/MAX6897 Output ENABLE (MAX6895) ENABLE (MAX6899) IN VCC LOGIC 0.5V OUT IN ENABLE OUT VIN < VTH Low Low VIN < VTH High Low VIN > VTH Low Low OUT = VCC (MAX6895) VIN > VTH 250nA High 1.0V MAX6895 MAX6899 Table 2. MAX6896/MAX6898 Output ENABLE IN CDELAY GND VIN < VTH Low Figure 1.
PAGE 7
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Monitor Input (IN) asserts (OUT goes high or OUT goes low). When the output asserts, CCDELAY is immediately discharged. Adjust the delay (tDELAY) from when VIN rises above VTH (with ENABLE high or ENABLE low) to OUT going high (OUT going low) according to the equation: Connect the center point of a resistive divider to IN to monitor external voltages (see R1 and R2 of the Typical Operating Circuit).
PAGE 8
MAX6895–MAX6899 VCC Ultra-Small, Adjustable Sequencing/ Supervisory Circuits VUVLO IN t < tPROPA t > tPW ENABLE OUT tPROPA tPROPA tDELAY tDL tOFF Figure 3. MAX6896A/MAX6898A Timing Diagram VCC VUVLO IN t > tPW ENABLE OUT tDELAY tPROPP tDL tOFF tPROPP Figure 4. MAX6895P/MAX6897P Timing Diagram www.maximintegrated.
PAGE 9
MAX6895–MAX6899 VCC Ultra-Small, Adjustable Sequencing/ Supervisory Circuits VUVLO IN t > tPW ENABLE OUT tDELAY tPROPP tDL tOFF tPROPP Figure 5. MAX6896P/MAX6898P Timing Diagram VCC VUVLO IN VTH VTH t < tPROPA t > tPW ENABLE OUT tPROPA tPROPA tDELAY tDL tOFF Figure 6. MAX6899A Timing Diagram www.maximintegrated.
PAGE 10
MAX6895–MAX6899 VCC Ultra-Small, Adjustable Sequencing/ Supervisory Circuits VUVLO IN t > tPW ENABLE OUT tDELAY tPROPP tDL tOFF tPROPP Figure 7. MAX6899P Timing Diagram Enable Input (ENABLE or ENABLE) The MAX6895/MAX6897 offer an active-high enable input (ENABLE), while the MAX6896/MAX6898/MAX6899 offer an active-low enable input (ENABLE). With VIN above VTH, drive ENABLE high (ENABLE low) to force OUT high (OUT low) after the adjustable delay time (A versions).
PAGE 11
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Pullup Resistor Values (MAX6897/MAX6898) The exact value of the pullup resistors for the open-drain outputs is not critical, but some consideration should be made to ensure the proper logic levels when the device is sinking current. For example, if VCC = 2.25V and the pullup voltage is 28V, you would try to keep the sink current less than 0.5mA as shown in the Electrical Characteristics table.
PAGE 12
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits 2.5V 3.3V 5V BUS DC-DC DC-DC DC-DC DC-DC EN EN EN EN SYSTEM ENABLE ENABLE IN VCC MAX6895 ENABLE IN OUT GND VCC MAX6895 ENABLE OUT GND CCDELAY 1.2V 1.8V IN VCC MAX6895 ENABLE OUT GND CCDELAY IN VCC MAX6895 OUT GND CCDELAY CCDELAY Figure 10. Multiple-Output Sequencing www.maximintegrated.
PAGE 13
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Selector Guide PART ENABLE INPUT OUTPUT INPUT (IN) DELAY ENABLE DELAY MAX6895AALT+T Active-High Active-High, Push-Pull Capacitor Adjustable Capacitor Adjustable MAX6895AAZT+T Active-High Active-High, Push-Pull Capacitor Adjustable Capacitor Adjustable MAX6895PALT+T Active-High Active-High, Push-Pull Capacitor Adjustable 150ns Delay MAX6895PAZT+T Active-High Active-High, Push-Pull Capacitor Adjustable 150ns Del
PAGE 14
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Pin Configurations (continued) TOP VIEW VCC CDELAY OUT 6 5 4 TOP VIEW ENABLE 1 GND 2 IN 3 MAX6896 MAX6898 1 2 3 ENABLE GND IN + 6 CDELAY 5 VCC MAX6895 MAX6897 4 OUT THIN SOT23 µDFN TOP VIEW ENABLE 1 GND 2 IN 3 + 6 CDELAY 5 VCC MAX6896 MAX6898 MAX6899 4 OUT (OUT) THIN SOT23 Chip Information PROCESS: BiCMOS Package Information For the latest package outline information and land patterns (footprint
PAGE 15
MAX6895–MAX6899 Ultra-Small, Adjustable Sequencing/ Supervisory Circuits Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 5 10/07 — 6 11/09 Corrected Absolute Maximum Ratings and made style corrections to Electrical Characteristics and TOC8 and TOC9 2–5 7 7/10 Revised Figures 3, 4, and 6 7–9 8 7/11 Added automotive packages for MAX6896A and MAX6896P; added top mark to MAX6896AAZT/V+1 in the Ordering Information table 1 9 12/13 Added automotive packages for MAX6897 in the Or