Rainbow Electronics MAX924 - Manual

_______________General Description
The MAX921–MAX924 single, dual, and quad micro-
power, low-voltage comparators feature the lowest
power consumption available. These comparators draw
less than 4µA supply current over temperature
(MAX921/MAX922), and include an internal 1.182V
±1% voltage reference, programmable hysteresis, and
TTL/CMOS outputs that sink and source current.
Ideal for 3V or 5V single-supply applications, the
MAX921–MAX924 operate from a single +2.5V to +11V
supply (or a ±1.25V to ±5V dual supply), and each
comparator’s input voltage range swings from the
negative supply rail to within 1.3V of the positive
supply.
The MAX921–MAX924’s unique output stage con-
tinuously sources as much as 40mA. And by eliminating
power-supply glitches that commonly occur when com-
parators change logic states, the MAX921–MAX924
minimize parasitic feedback, which makes them easier to
use.
The single MAX921 and dual MAX923 provide a unique
and simple method for adding hysteresis without
feedback and complicated equations, simply by using
the HYST pin and two resistors.
________________________Applications
Battery-Powered Systems
Threshold Detectors
Window Comparators
Oscillator Circuits
____________________________Features
♦ µMAX Package—Smallest 8-Pin SO
(MAX921/MAX922/MAX923)
♦ Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX921)
♦ Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
♦ Input Voltage Range Includes Negative Supply
♦ Internal 1.182V ±1% Bandgap Reference
♦ Adjustable Hysteresis
♦ TTL/CMOS-Compatible Outputs
♦ 12µs Propagation Delay (10mV Overdrive)
♦ No Switching Crowbar Current
♦ 40mA Continuous Source Current
______________Ordering Information
Ordering Information continued at end of data sheet.
* Dice are tested at T A = +25°C, DC parameters only.
** Contact factory for availability and processing to MIL-STD-883.
MAX921–MAX924
Ultra Low-Power,
Single/Dual-Supply Comparators
________________________________________________________________ Maxim Integrated Products 1
MAX921
OUT
IN+
HYST
REF
V- GND
V+
2 1
4
5
6
8
3
7
IN-
THRESHOLD DETECTOR
V IN
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
19-0115; Rev 3; 3/95
PART TEMP. RANGE PIN-PACKAGE
MAX921 CPA 0°C to +70°C 8 Plastic DIP
MAX921CSA 0°C to +70°C 8 SO
MAX921C/D 0°C to +70°C Dice*
PART INTERNAL 1% PRECISION REFERENCE COMPARATORS PER PACKAGE INTERNAL HYSTERESIS PACKAGE
MAX921 Yes 1 Yes
8-Pin
DIP/SO/µMAX
MAX922 No 2 No
8-Pin
DIP/SO/µMAX
MAX923 Yes 2 Yes
8-Pin
DIP/SO/µMAX
MAX924 Yes 4 No
16-Pin
DIP/SO/µMAX
MAX921EPA -40°C to +85°C 8 Plastic DIP
MAX921ESA -40°C to +85°C 8 SO
MAX921MJA -55°C to +125°C 8 CERDIP**
MAX921CUA 0°C to +70°C 8 µMAX