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MAX977

更新时间： 2024-11-05 22:55:07
品牌 Logo 应用领域
美信 - MAXIM 比较器
页数 文件大小 规格书
16页 266K
描述
Single/Dual, +3V/+5V Dual-Speed Comparators with Auto-Standby

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19-1141; Rev 1; 11/98  
S in g le /Du a l, +3 V/+5 V Du a l-S p e e d  
Co m p a ra t o rs w it h Au t o -S t a n d b y  
5/MAX97  
Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX975/MAX977 single/dual comparators feature  
three different operating modes, and are optimized for  
+3V and +5V single-supply applications. The operating  
modes are as follows: high speed, high speed with  
auto-standby, and low power. Propagation delay is 28ns  
in high-speed mode, while supply current is only 250µA.  
Supply current is reduced to 3µA in low-power mode.  
♦ Three Operating Modes:  
High Speed  
High Speed with Auto-Standby  
Low Power  
♦ 28ns Propagation Delay (high-speed mode)  
♦ 5µA Max Supply Current in Low-Power/  
Auto-Standby Modes  
The a uto-sta ndb y fe a ture a llows the c omp a ra tor to  
automatically change from low-power mode to high-  
speed mode upon receipt of an input signal. In the  
absence of an input signal, the comparator reverts  
back to low-power mode after an adjustable timeout  
period. The timeout period for the MAX975 to enter  
standby is set by a single capacitor. The dual MAX977  
features independently adjustable timeout periods for  
each comparator using separate capacitors.  
♦ +3V/+5V Single-Supply Operation  
♦ Rail-to-Rail Outputs  
♦ Ground-Sensing Input  
♦ Internal Hysteresis (high-speed mode)  
♦ Adjustable Timeout Period  
♦ µMAX Package (MAX975)  
QSOP-16 Package (MAX977)  
The MAX975/MAX977’s inputs have a common-mode  
voltage range of -0.2V to (V  
- 1.2V). The differential  
CC  
input voltage range extends rail to rail. The 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 condition to either rail. The  
comparator’s internal hysteresis in high-speed mode  
ensures clean output switching, even with slow-moving  
input signals.  
Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SO  
MAX975ESA  
MAX975EUA  
MAX977ESD  
MAX977EEE  
8 µMAX  
14 SO  
16 QSOP  
The single MAX975 is available in 8-pin SO and 8-pin  
µMAX packages, while the dual MAX977 is available in  
14-pin SO and 16-pin QSOP packages.  
Fu n c t io n a l Dia g ra m  
V
CC  
________________________Ap p lic a t io n s  
MAX975  
IN+  
Battery-Powered Systems  
RF ID Tags  
LP  
HIGH SPEED  
ENABLE  
OUT  
Keyless Entry  
Threshold Detectors/Discriminators  
3V Systems  
TRANSITION  
MONITOR  
IR Receivers  
Digital-Line Receivers  
GND  
LOW POWER  
ENABLE  
IN-  
TIMING  
CIRCUIT  
STAT  
STO  
Pin Configurations appear at end of data sheet.  
________________________________________________________________ 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 1-800-835-8769.  
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