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SN74AHCT123A PDF预览

SN74AHCT123A

更新时间: 2024-11-03 23:09:43
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德州仪器 - TI 触发器
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描述
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS

SN74AHCT123A 数据手册

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SN54AHCT123A, SN74AHCT123A  
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS  
SCLS420G – JUNE 1998 – REVISED APRIL 2003  
SN54AHCT123A . . . J OR W PACKAGE  
SN74AHCT123A . . . D, DB, DGV, N, OR PW PACKAGE  
(TOP VIEW)  
Inputs Are TTL-Voltage Compatible  
Schmitt-Trigger Circuitry On A, B, and CLR  
Inputs for Slow Input Transition Rates  
1A  
1B  
V
CC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
Edge Triggered From Active-High or  
Active-Low Gated Logic Inputs  
1R /C  
ext ext  
1CLR  
1Q  
1C  
1Q  
ext  
Retriggerable for Very Long Output Pulses  
Overriding Clear Terminates Output Pulse  
2Q  
12 2Q  
Latch-Up Performance Exceeds 100 mA Per  
JESD 78, Class II  
11  
10  
9
2C  
2CLR  
2B  
ext  
2R /C  
ext ext  
GND  
ESD Protection Exceeds JESD 22  
– 2000-V Human-Body Model (A114-A)  
– 200-V Machine Model (A115-A)  
2A  
SN54AHCT123A . . . FK PACKAGE  
(TOP VIEW)  
– 1000-V Charged-Device Model (C101)  
description/ordering information  
These edge-triggered multivibrators feature  
output pulse-duration control by three methods. In  
the first method, the A input is low, and the B input  
goes high. In the second method, the B input is  
high, and the A input goes low. In the third method,  
the A input is low, the B input is high, and the clear  
(CLR) input goes high.  
3
2
1 20 19  
18  
1C  
1Q  
1CLR  
1Q  
4
5
6
7
8
ext  
17  
16  
NC  
NC  
15 2Q  
14  
9 10 11 12 13  
2Q  
The output pulse duration is programmed by  
selecting external resistance and capacitance  
values. The external timing capacitor must be  
2CLR  
2C  
ext  
connected between C and R /C (positive)  
ext  
ext ext  
and an external resistor connected between  
/C and V . To obtain variable pulse  
R
ext ext  
CC  
durations, connectanexternalvariableresistance  
between R /C and V . The output pulse  
duration also can be reduced by taking CLR low.  
NC – No internal connection  
ext ext  
CC  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
PACKAGE  
T
A
PDIP – N  
SOIC – D  
Tube  
SN74AHCT123AN  
SN74AHCT123AN  
Tube  
SN74AHCT123AD  
AHCT123A  
Tape and reel  
Tape and reel  
Tape and reel  
Tape and reel  
Tube  
SN74AHCT123ADR  
SN74AHCT123ADBR  
SN74AHCT123APWR  
SN74AHCT123ADGVR  
SNJ54AHCT123AJ  
SNJ54AHCT123AW  
SNJ54AHCT123AFK  
–40°C to 85°C  
–55°C to 125°C  
SSOP – DB  
TSSOP – PW  
TVSOP – DGV  
CDIP – J  
HB123A  
HB123A  
HB123A  
SNJ54AHCT123AJ  
SNJ54AHCT123AW  
SNJ54AHCT123AFK  
CFP – W  
Tube  
LCCC – FK  
Tube  
Packagedrawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are  
available at www.ti.com/sc/package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2003, Texas Instruments Incorporated  
On products compliant to MIL-PRF-38535, all parameters are tested  
unless otherwise noted. On all other products, production  
processing does not necessarily include testing of all parameters.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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