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MAX907/MAX908/MAX909

Dual/Quad/Single, High-Speed, Ultra-Low-Power,

Single-Supply TTL Comparators

________________________________________________________________ Maxim Integrated Products 1

V+

OUTB

INB-

INB+

GND

INA+

INA-

OUTA

MAX907

DIP/SO

TOP VIEW

OUTD

IND-

IND+

GND

V+

INA+

INA-

OUTA

MAX908

DIP/SO

INC+

INC-

OUTC

OUTB

INB-

INB+

Pin Configurations

19-0129; Rev. 4; 9/01

General Description

The MAX907/MAX908/MAX909 are dual/quad/single,

high-speed, ultra-low-power voltage comparators

designed for use in systems powered from a single

+5V supply; the MAX909 also accepts dual ±5V sup-

plies. Their 40ns propagation delay (with 5mV input

overdrive) is achieved with a power consumption of

only 3.5mW per comparator. The wide input common-

mode range extends from 200mV below ground (below

the negative supply rail for the MAX909) to within 1.5V

of the positive supply rail.

Because they are micropower, high-speed compara-

tors that operate from a single +5V supply and include

built-in hysteresis, these devices replace a variety of

older comparators in a wide range of applications.

MAX907/MAX908/MAX909 outputs are TTL-compati-

ble, requiring no external pullup circuitry. All inputs and

outputs can be continuously shorted to either supply

rail without damage. These easy-to-use comparators

incorporate internal hysteresis to ensure clean output

switching even when the devices are driven by a slow-

moving input signal.

The MAX909 features complementary outputs and an

output latch. A separate supply pin for extending the

analog input range down to -5V is also provided.

The dual MAX907 and single MAX909 are available in

8-pin DIP and SO packages, and the quad MAX908 is

available in 14-pin DIP and SO packages. These com-

parators are ideal for single +5V-supply applications

that require the combination of high speed, precision,

and ultra-low power dissipation.

Applications

Battery-Powered Systems

High-Speed A/D Converters

High-Speed V/F Converters

Line Receivers

Threshold Detectors/Discriminators

High-Speed Sampling Circuits

Zero-Crossing Detectors

Features

♦ 40ns Propagation Delay

♦ 700µA (3.5mW) Supply Current per Comparator

♦ Single 4.5V to 5.5V Supply Operation

(or ±5V, MAX909 only)

♦ Wide Input Range Includes Ground

(or -5V, MAX909 only)

♦ Low, 500µV Offset Voltage

♦ Internal Hysteresis Provides Clean Switching

♦ TTL-Compatible Outputs

(Complementary on MAX909)

♦ Input and Output Short-Circuit Protection

♦ Internal Latch (MAX909 only)

Ordering Information

PART

TEMP. RANGE PIN-PACKAGE

MAX907CPA

0°C to +70°C 8 Plastic DIP

MAX907CSA 0°C to +70°C 8 SO

MAX907EPA 8 Plastic DIP

MAX907ESA

-40°C to +85°C

8SO

Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Summary of content (10 pages)

PAGE 1
9-0129; Rev. 4; 9/01 Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators The MAX907/MAX908/MAX909 are dual/quad/single, high-speed, ultra-low-power voltage comparators designed for use in systems powered from a single +5V supply; the MAX909 also accepts dual ±5V supplies. Their 40ns propagation delay (with 5mV input overdrive) is achieved with a power consumption of only 3.5mW per comparator.
PAGE 2
MAX907/MAX908/MAX909 Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) . . . 727mW 8-Pin SO (derate 5.88mW/°C above +70°C) . . . . . . . . . . . 471mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) . . . 800mW 14-Pin SO (derate 8.33mW/°C above +70°C) . . . . . . . . . . 667mW Operating Temperature Ranges: MAX90_C_ _ . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators MAX907/MAX908/MAX909 ELECTRICAL CHARACTERISTICS (continued) (V+ = 5V, TA = +25°C; MAX909 only: V- = 0, VLATCH = 0; unless otherwise noted.
PAGE 4
MAX907/MAX908/MAX909 Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators ELECTRICAL CHARACTERISTICS (continued) (V+ = 5V, TA = TMIN to TMAX; MAX909 only: V- = 0, VLATCH = 0; unless otherwise noted.
PAGE 5
Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators PROPAGATION DELAY vs. SOURCE IMPEDANCE 40 tPD+ tPD- 30 20 10 10 60 tPD+ tPD40 20 100 60 tPD+ 50 tPD- 40 100 10k 1k 0 20 40 60 80 100 SOURCE IMPEDANCE (Ω) CAPACITIVE LOAD (pF) PROPAGATION DELAY vs. TEMPERATURE OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT OUTPUT LOW VOLTAGE vs. SINK CURRENT 0.5 MAX907 TOC05 5.0 VIN = 100mV 4.5 tPD+ tPD- 50 40 TA = +125°C 4.0 TA = +25°C 0.3 TA = +125°C 0.
PAGE 6
Typical Operating Characteristics (continued) (V+ = 5V, TA = +25°C, unless otherwise noted.) V- = -5V TA = +125°C TA = +25°C TOTAL I+ (mA) TOTAL ICC (mA) 3.0 TA = -55°C V+ = +5V TA = +125°C TOTAL I- (µA) TA = +125°C 200 MAX907 TOC11 2.0 MAX907 TOC10 4.0 2.0 MAX909 NEGATIVE SUPPLY CURRENT vs. NEGATIVE SUPPLY VOLTAGE MAX909 POSITIVE SUPPLY CURRENT vs. POSITIVE SUPPLY VOLTAGE MAX907 TOC12 MAX908 TOTAL POSITIVE SUPPLY CURRENT vs. POSITIVE SUPPLY VOLTAGE (OUTPUTS AT VOH) TA = +25°C 1.
PAGE 7
Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators MAX907/MAX908 PROPAGATION DELAY (tPD+) (5mV OVERDRIVE) MAX907/MAX908 PROPAGATION DELAY (tPD-) (5mV OVERDRIVE) MAX907 TOC20 MAX907 TOC19 5mV OVERDRIVE INPUT GND INPUT 20mV/div INPUT GND -5mV OVERDRIVE INPUT 20mV/div OUTPUT 500mV/div OUTPUT 500mV/div TTL THRESHOLD (1.4V) TTL THRESHOLD (1.
PAGE 8
Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators MAX907/MAX908/MAX909 Pin Description PIN NAME FUNCTION MAX907 MAX908 MAX909 1 1 — 2 2 — INA- Comparator A Inverting Input 3 3 — INA+ Comparator A Noninverting Input 4 11 6 GND Ground 5 5 — INB+ Comparator B Noninverting Input 6 6 — INB- Comparator B Inverting Input 7 7 — OUTB 8 4 1 V+ — 8 — OUTC — 9 — INC- Comparator C Inverting Input — 10 — INC+ Comparator C Noninverting Inpu
PAGE 9
Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators VHYST VOS = VTRIP- LATCH 3V VIN+ VTRIP+ + VTRIP2 LE 1.4V 0 VIN- = 0 VOS VOH COMPARATOR OUTPUT DIFFERENTIAL INPUT VOLTAGE Figure 1. Input and Output Waveforms, Noninverting Input Varied Applications Information th VOD VIN VOH VOL COMPARE ts tPD+ OUTPUT 1.4V (QOUT) VOL tSKEW VOH OUTPUT (QOUT) 1.
PAGE 10
MAX907/MAX908/MAX909 Dual/Quad/Single, High-Speed, Ultra-Low-Power, Single-Supply TTL Comparators 10pF 1MΩ VCLAMP = -200mV TO -300mV +5V 1/2 MAX907 +5V 0.1µF MAX403 2 7 6 SIEMENS BP-104 PHOTODIODE 3 ISRC 3 1 4 100kΩ 47kΩ 0.1µF 8 2 4 100kΩ DATA MAX907 +5V 1000pF V- 1000pF Figure 3. Schottky Clamp for Input Driven Below Ground Pin Configurations (continued) TOP VIEW Figure 4. Battery-Operated Infrared Data Link Consumes Only 1mA Ordering Information (continued) PART TEMP.