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PDF MAX978EEE Data sheet ( Hoja de datos )
| Número de pieza | MAX978EEE | |
| Descripción | Single/Dual/Quad / SOT23 / Single-Supply / High-Speed / Low-Power Comparators | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1299; Rev 1; 1/98
Single/Dual/Quad, SOT23, Single-Supply,
High-Speed, Low-Power Comparators
________________General Description
The MAX976/MAX978/MAX998 dual/quad/single, high-
speed, low-power comparators are optimized for
+3V/+5V single-supply applications. They achieve a
20ns propagation delay while consuming only 225µA
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.
The MAX976/MAX978/MAX998 inputs have a common-
mode voltage range that extends 200mV below ground.
Their outputs are capable of Rail-to-Rail® operation
without external pull-up circuitry, making these devices
ideal for interface with CMOS/TTL logic. All inputs and
outputs can tolerate a continuous short-circuit fault con-
dition to either rail. The comparators’ internal hysteresis
ensures clean output switching, even with slow-moving
input signals.
For space-critical applications, the single MAX998 is
available in a 6-pin SOT23 package, the dual MAX976
is available in an 8-pin µMAX package, and the quad
MAX978 is available in a 16-pin QSOP package.
________________________Applications
Battery-Powered Systems
Threshold Detectors/Discriminators
3V Systems
IR Receivers
Digital Line Receivers
____________________________Features
o Single-Supply Operation Down to 2.7V
o 20ns Propagation Delay
o 225µA Supply Current
o 1nA Shutdown Supply Current
o Rail-to-Rail Outputs
o Ground-Sensing Inputs
o Internal Hysteresis Ensures Clean Switching
o Available in Space-Saving Packages:
SOT23-6 (MAX998)
µMAX (MAX976)
QSOP-16 (MAX978)
_______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
SOT
TOP MARK
MAX976ESA -40°C to +85°C 8 SO
—
MAX976EUA
MAX978ESE
MAX978EEE
-40°C to +85°C 8 µMAX
-40°C to +85°C 16 Narrow SO
-40°C to +85°C 16 QSOP
—
—
—
MAX998ESA -40°C to +85°C 8 SO
MAX998EUT-T -40°C to +85°C 6 SOT23-6
—
AAAO
___________Typical Operating Circuit __________________Pin Configurations
VCC
RD
R1
VCC
VCC
0.1µF
VCC OUT
GND SHDN
VCC
R2
MAX998
TOP VIEW
OUT 1
MAX998 6 VCC
GND 2
5 SHDN
+-
IN+ 3
4 IN-
SOT23-6
IR RECEIVER
Pin Configurations continued at end of data sheet
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
1 page  
Single/Dual/Quad, SOT23, Single-Supply,
High-Speed, Low-Power Comparators
______________________________Typical Operating Characteristics (continued)
(VCC = +5V, VCM = 0V, TA = +25°C, unless otherwise noted.)
SHDN
2V/div
SHUTDOWN DELAY TIME
MAX976 TOC16
VIN+ > VIN-
SHDN
2V/div
WAKE-UP FROM SHUTDOWN
MAX976 TOC17
VIN+ > VIN-
VOUT
2V/div
200ns/div
VOUT
2V/div
5µs/div
______________________________________________________________Pin Description
MAX976
SO/µMAX
1, 3
2, 4
5
6, 7
8
—
PIN
MAX978
MAX998
SO/QSOP SOT23-6
SO
1, 3, 5, 7
3
3
2, 4, 6, 8
4
2
9, 13
2
4
10, 11,
14, 15
1
6
12, 16
6
7
— — 1, 5
——
5
8
NAME
FUNCTION
IN_+
IN_-
GND
OUT_
VCC
N.C.
SHDN
Comparator Noninverting Input
Comparator Inverting Input
Ground
Comparator Output
Supply Voltage, +2.7V to +5.5V
No Connection. Not internally connected.
Shutdown Input. Drive low for shutdown mode. Drive high or con-
nect to VCC for normal operation.
__________________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 (VCC - 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.
_______________________________________________________________________________________ 5
5 Page | ||
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| PDF Descargar | [ Datasheet MAX978EEE.PDF ] | |
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