Typical operating characteristics (continued) – Rainbow Electronics MAX998 User Manual
Page 5
MAX976/MAX978/MAX998
Single/Dual/Quad, SOT23, Single-Supply,
High-Speed, Low-Power Comparators
_______________________________________________________________________________________
5
MAX978
3
3
MAX976
IN_+
2
4
IN_-
Comparator Inverting Input
2, 4, 6, 8
2, 4
4
2
GND
6
1
OUT_
Comparator Output
10, 11,
14, 15
6, 7
NAME
Ground
9, 13
5
Comparator Noninverting Input
1, 3, 5, 7
1, 3
7
6
V
CC
Supply Voltage, +2.7V to +5.5V
12, 16
8
1, 5
—
N.C.
8
5
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
SO
SO/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
5
µ
s/div
WAKE-UP FROM SHUTDOWN
V
OUT
2V/div
MAX976 TOC17
V
IN+
> V
IN-