Owner's manual

MAX976/MAX978/MAX998
Single/Dual/Quad, SOT23, Single-Supply,
High-Speed, Low-Power Comparators
_______________________________________________________________________________________ 5
MAX978
33
MAX976
IN_+
24 IN_- Comparator Inverting Input2, 4, 6, 82, 4
42 GND
61 OUT_ Comparator Output
10, 11,
14, 15
6, 7
NAME
Ground9, 135
Comparator Noninverting Input1, 3, 5, 71, 3
76 V
CC
Supply Voltage, +2.7V to +5.5V12, 168
1, 5— N.C.
85
SHDN
Shutdown Input. Drive low for shutdown mode. Drive high or con-
nect to V
CC
for normal operation.
——
No Connection. Not internally connected.——
FUNCTION
MAX998
PIN
SOT23-6 SOSO/µMAX SO/QSOP
______________________________________________________________Pin Description
__________________Detailed Description
The MAX976/MAX978/MAX998 dual/quad/single com-
parators operate from a single +2.7V to +5.5V supply.
They achieve a 20ns propagation delay while consum-
ing only 225µA of supply current per comparator. The
MAX998 features a low-power shutdown mode that
places the output in a high-impedance state and
reduces supply current to 1nA. Activate shutdown
mode by driving SHDN low.
The MAX976/MAX978/MAX998 comparator inputs have
a common-mode voltage range of -0.2V to (V
CC
- 1.2V).
Either input can be driven to the Absolute Maximum
Ratings limit without false output inversion, as long as
the other input is within the Common-Mode Voltage
Range. Their push/pull output structure is capable of
rail-to-rail operation without external pull-up circuitry,
making these devices ideal for interfacing with
CMOS/TTL logic. All inputs and outputs can tolerate a
continuous short-circuit fault condition to either supply.
The comparator’s internal hysteresis ensures clean out-
put switching, even with slow-moving input signals.
______________________________Typical Operating Characteristics (continued)
(V
CC
= +5V, V
CM
= 0V, T
A
= +25°C, unless otherwise noted.)
SHDN
2V/div
200ns/div
SHUTDOWN DELAY TIME
V
OUT
2V/div
MAX976 TOC16
V
IN+
> V
IN-
SHDN
2V/div
5µs/div
WAKE-UP FROM SHUTDOWN
V
OUT
2V/div
MAX976 TOC17
V
IN+
> V
IN-