19-0194; Rev 1; 2/97
Ult ra Lo w -P o w e r, Lo w -Co s t
Co m p a ra t o rs w it h 2 % Re fe re n c e
1-MAX934
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX931-MAX934 single, dual, and quad micropower,
low-voltage comparators plus an on-board 2% accurate
reference feature the lowest power consumption available.
These comparators draw less than 4µA supply current
ove r te mp e ra ture (MAX931), a nd inc lud e a n inte rna l
1.182V ±2% voltage reference, programmable hysteresis,
and TTL/CMOS outputs that sink and source current.
♦ Ultra-Low 4µA Max Quiescent Current
Over Extended Temp. Range (MAX931)
♦ Power Supplies:
Single +2.5V to +11V
Dual ±1.25V to ±5.5V
♦ Input Voltage Range Includes Negative Supply
♦ Internal 1.182V ±2% Bandgap Reference
♦ Adjustable Hysteresis
Id e a l for 3V or 5V s ing le -s up p ly a p p lic a tions , the
MAX931-MAX934 operate from a single +2.5V to +11V
s up p ly (or a ± 1.25V to ± 5V d ua l s up p ly), a nd e a c h
c omp a ra tor’s inp ut volta g e ra ng e e xte nd s from the
negative supply rail to within 1.3V of the positive supply.
♦ TTL-/CMOS-Compatible Outputs
♦ 12µs Propagation Delay (10mV Overdrive)
♦ No Switching Crowbar Current
The MAX931-MAX934’s unique output stage continuously
sources as much as 40mA. And by eliminating power-
supply glitches that commonly occur when comparators
c ha ng e log ic s ta te s , the MAX931-MAX934 minimize
parasitic feedback, which makes them easier to use.
♦ 40mA Continuous Source Current
♦ Available in Space-Saving µMAX Package
The single MAX931 and dual MAX932/MAX933 provide a
unique and simple method for adding hysteresis without
feedback and complicated equations, using the HYST pin
and two resistors.
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
MAX931CPA
MAX931CSA
MAX931CUA
MAX931EPA
MAX931ESA
For applications that require increased precision with
similar power requirements, see the MAX921-MAX924 data
sheet. These devices include a 1% precision reference.
8 µMAX
8 Plastic DIP
8 SO
INTERNAL COMPARATORS
INTERNAL
HYSTERESIS
PACK-
AGE
Ordering Information continued on last page.
PART
2%
PER
For similar devices guaranteed over the military temp. range, see
the MAX921-MAX924 data sheet. The MAX931, MAX933, and
MAX934 are pin-compatible with the 1% accurate MAX921,
MAX923, and MAX924, respectively. The MAX932 and
MAX922 are not pin-compatible.
REFERENCE
PACKAGE
8-Pin
DIP/SO/
µMAX
MAX931
MAX932
Yes
Yes
1
2
Yes
Yes
8-Pin
DIP/SO/
µMAX
__________Typ ic a l Op e ra t in g Circ u it
8-Pin
DIP/SO/
µMAX
V
IN
MAX933
MAX934
Yes
Yes
2
4
Yes
No
7
V+
3
4
5
6
IN+
16-Pin
DIP/SO
OUT
8
IN-
________________________Ap p lic a t io n s
Battery-Powered Systems
Threshold Detectors
HYST
REF
MAX931
Window Comparators
V-
GND
2
1
Oscillator Circuits
Alarm Circuits
THRESHOLD DETECTOR
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800