Datasheet

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General Description

The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault-

protected multiplexers that are pin compatible with the

industry-standard DG508/DG509. The MAX4508/

MAX4509 operate with dual supplies of ±4.5V to ±20V or

a single supply of +9V to +36V. These multiplexers fea-

ture fault-protected inputs, rail-to-rail signal handling

capability, and overvoltage clamping at 150mV beyond

the rails.

Both parts offer ±40V overvoltage protection with sup-

plies off and ±25V protection with supplies on. On-

resistance is 400Ω max and is matched between

channels to 15Ω max. All digital inputs have TTL logic

thresholds, ensuring both TTL and CMOS logic com-

patibility when using a single +12V supply or dual ±15V

supplies.

Applications

Data-Acquisition Systems

Industrial and Process Control

Avionics

Signal Routing

Redundant/Backup Systems

Features

♦ ±40V Fault Protection with Power Off

±25V Fault Protection with ±15V Supplies

♦ Rail-to-Rail Signal Handling

♦ No Power-Supply Sequencing Required

♦ All Channels Off with Power Off

♦ Output Clamped to Appropriate Supply Voltage

During Fault Condition

♦ 1kΩ Output Clamp Resistance During

Overvoltage

♦ 400

ΩΩ

max On-Resistance

♦ 20ns Fault-Response Time

♦ ±4.5V to ±20V Dual Supplies

+9V to +36V Single Supply

♦ TTL/CMOS-Compatible Logic Inputs

MAX4508/MAX4509

Fault-Protected, High-Voltage Single 8-to-1/

Dual 4-to-1 Multiplexers with Output Clamps

________________________________________________________________ Maxim Integrated Products 1

GND

V+

NO1

V-

TOP VIEW

MAX4508

NO5

NO6

NO7

NO8

COM

NO4

NO3

NO2

SO/DIP

LOGIC

GND

V+

NO1B

NO1A

V-

MAX4509

NO2B

NO3B

NO4B

COMB

COMA

NO4A

NO3A

NO2A

SO/DIP

LOGIC

Pin Configurations/Functional Diagrams

19-1414; Rev 5; 10/07

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

**Contact factory for availability.

+Denotes a lead-free package.

Functional Diagrams/Truth Tables appear at end of

data sheet.

Ordering Information

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.

PART

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX4508CSE+

0°C to +70°C 16 Narrow SO

S16-8

MAX4508CPE+

0°C to +70°C 16 Plastic DIP

P16-4

MAX4508C/D

0°C to +70°C

Dice* —

MAX4508ESE+

-40°C to +85°C 16 Narrow SO

S16-8

MAX4508EPE+

-40°C to +85°C 16 Plastic DIP

P16-4

MAX4508MJE

-40°C to +85°C

16 CERDIP** J16-3

Summary of content (18 pages)

PAGE 1
9-1414; Rev 5; 10/07 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 faultprotected multiplexers that are pin compatible with the industry-standard DG508/DG509. The MAX4508/ MAX4509 operate with dual supplies of ±4.5V to ±20V or a single supply of +9V to +36V. These multiplexers feature fault-protected inputs, rail-to-rail signal handling capability, and overvoltage clamping at 150mV beyond the rails.
PAGE 2
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) V+ ........................................................................-0.3V to +44.0V V- .........................................................................-44.0V to +0.3V V+ to V-................................................................-0.3V to +44.0V COM_, A_ (Note 1) .............................. (V+ + 0.3V) to (V- - 0.3V) NO_..
PAGE 3
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps (V+ = +15V, V- = -15V, VA_H = +2.4V, VA_L = +0.8V, VEN = +2.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) (V+ = +15V, V- = -15V, VA_H = +2.4V, VA_L = +0.8V, VEN = +2.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps (V+ = +12V, V- = 0, VA_H = +2.4V, VA_L = +0.8V, VEN = +2.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 6
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps ELECTRICAL CHARACTERISTICS—Single +12V Supply (continued) (V+ = +12V, V- = 0, VA_H = +2.4V, VA_L = +0.8V, VEN = +2.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 7
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps 900 700 RON (Ω) V+ = +15V V- = -15V 500 600 V+ = +20V 500 300 +25°C 200 -40°C 300 200 200 V+ = +20V V- = -20V 100 0 0 -10 -5 0 5 10 15 20 0 5 10 15 VCOM (V) +125°C 800 LEAKAGE (A) +25°C 500 V+ = +15V V- = -15V VCOM = 10V VNO = ±10V 100n 10n +70°C 600 -40°C -10 -5 -55°C 0 5 ICOM_ON 2.5 V+ = +15V V- = -15V 2.0 INO_OFF 200 DUAL SUPPLIES 1.5 0.5 1p 0.
PAGE 8
Typical Operating Characteristics (continued) (V+ = +15V, V- = -15V, VEN = +2.4V, TA = +25°C, unless otherwise noted.) POWER-SUPPLY CURRENT vs. TEMPERATURE (VA = 0) 100 IGND 0 -100 I- -200 400 200 IGND 0 -200 -400 I- -600 -300 -55 -30 -5 20 45 70 95 -60 -40 -20 0 120 145 LOGIC-LEVEL THRESHOLD vs. SUPPLY VOLTAGE FREQUENCY RESPONSE 20 MAX4508/09toc12 3.0 V- = GND 2.5 BANDWIDTH -20 LOSS (dB) SINGLE SUPPLY 1.5 V+ = +15V V- = -15V 0 DUAL SUPPLIES 2.
PAGE 9
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps MAX4508 (Single 8-to-1 Mux) PIN NAME MAX4509 (Dual 4-to-1 Mux) PIN FUNCTION NAME FUNCTION 1 A0 Address Bit 0 1 A0 Address Bit 0 2 EN Mux Enable 2 EN Mux Enable 3 V- Negative Supply Voltage 3 V- Negative Supply Voltage 4 NO1 Channel Input 1 4 NO1A Channel Input 1A 5 NO2 Channel Input 2 5 NO2A Channel Input 2A 6 NO3 Channel Input 3 6 NO3A Channel Input 3A 7 NO4 Channel Input 4
PAGE 10
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps NORMALLY OPEN SWITCH CONSTRUCTION V+ P2 HIGH FAULT P1 NO_ COM_ N1 LOW FAULT ON A- MAX4508 MAX4509 GWD N2 VESO CODE Figure 1. Functional Diagram When the NO_ voltage goes beyond supply rails (fault condition), the NO_ input becomes high impedance regardless of the switch state or load resistance.
PAGE 11
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps Positive Fault Condition When the signal on NO_ exceeds V+ by about 150mV, the positive fault comparator output goes high, turning off FETs N1 and P1 (Figure 1). This makes the NO_ pin high impedance, regardless of the switch state. If the switch state is “off,” all FETs turn off, and both NO_ and COM_ are high impedance. If the switch state is “on,” FET P2 turns on, clamping COM_ to V+.
PAGE 12
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps MAX4508/MAX4509 Test Circuits/Timing Diagrams +15V V+ NO1 A2 A1 +10V NO2–NO7 A0 MAX4508 +2.4V NO8 EN -10V COM GND VOUT V- 35pF 50Ω LOGIC INPUT VA_ 50% 0V 1k -15V VNO1 +15V SWITCH OUTPUT VOUT V+ NO1B A1 +10V 90% 0V 90% A0 VNO8 NO1A–NO4A +2.4V tR < 20ns tF < 20ns +3V NO4B MAX4509 EN -10V GND 50Ω tTRANS tTRANS COMB V- ON VOUT 35pF 300Ω -15V Figure 2.
PAGE 13
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps +15V +2.4V VEN V+ EN NO1–NO8 A0 LOGIC INPUT VA +10V MAX4508 50% 0V +5V A1 VA tR < 20ns tF < 20ns +3V 80% A2 COM GND SWITCH OUTPUT VOUT VOUT V- 35pF tOPEN 0V 1k 50Ω -15V Figure 4.
PAGE 14
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps Test Circuits/Timing Diagrams (continued) +15V CHANNEL SELECT A1 VNO_ V+ A2 A0 EN VCOM_ +15V 1MHz CAPACITANCE ANALYZER NO8 MAX4508 GND +25V NO1 V- -15V COM f = 1MHz -25V -15V Figure 9. Transient Behavior of Fault Condition Figure 8.
PAGE 15
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps PART TEMP RANGE MAX4509CSE+ MAX4509CPE+ MAX4509C/D PINPACKAGE PKG CODE 0°C to +70°C 16 Narrow SO S16-8 0°C to +70°C 16 Plastic DIP P16-4 0°C to +70°C Dice* EN A0 A1 A2 V- GND V+ — MAX4509ESE+ -40°C to +85°C 16 Narrow SO S16-8 MAX4509EPE+ -40°C to +85°C 16 Plastic DIP P16-4 MAX4509MJE -40°C to +85°C 16 CERDIP** J16-3 N05 N01 *Contact factory for dice specifications.
PAGE 16
Package Information DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.053 0.069 0.004 0.010 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.75 1.35 0.25 0.10 0.49 0.35 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.
PAGE 17
Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps CDIPS.EPS ______________________________________________________________________________________ 17 MAX4508/MAX4509 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
PAGE 18
MAX4508/MAX4509 Fault-Protected, High-Voltage Single 8-to-1/ Dual 4-to-1 Multiplexers with Output Clamps Revision History REVISION NUMBER REVISION DATE 5 10/07 DESCRIPTION EC table changes and stylistic corrections PAGES CHANGED 2–5 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.