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CD74HC4538-Q1 PDF预览

CD74HC4538-Q1

更新时间: 2024-11-02 12:42:59
品牌 Logo 应用领域
德州仪器 - TI 振荡器
页数 文件大小 规格书
16页 341K
描述
HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR

CD74HC4538-Q1 数据手册

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CD74HC4538-Q1  
HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE  
PRECISION MONOSTABLE MULTIVIBRATOR  
SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008  
D
D
D
D
D
D
D
D
D
D
Qualified for Automotive Applications  
Retriggerable/Resettable Capability  
Trigger and Reset Propagation Delays  
D
D
Balanced Propagation Delay and Transition  
Times  
Significant Power Reduction Compared to  
LSTTL Logic ICs  
Independent of R , C  
X
X
D
V
CC  
Voltage = 2 V to 6 V  
Triggering From the Leading or Trailing  
Edge  
D
High Noise Immunity N or N = 30% of  
IL  
IH  
V
CC  
, V = 5 V  
CC  
Q and Q Buffered Outputs Available  
Separate Resets  
M OR PW PACKAGE  
(TOP VIEW)  
Wide Range of Output Pulse Widths  
Schmitt-Trigger Input on A and B Inputs  
1CX  
1RXCX  
1R  
VCC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
Retrigger Time Is Independent of C  
X
2CX  
2RXCX  
2R  
2A  
2B  
Fanout (Over Temperature Range)  
− Standard Outputs . . . 10 LSTTL Loads  
− Bus Driver Outputs . . . 15 LSTTL Loads  
1A  
1B  
1Q  
1Q  
description/ordering information  
10 2Q  
2Q  
GND  
9
The CD74HC4538 is a dual retriggerable/resettable  
precision monostable multivibrator for fixed-voltage  
timing applications. An external resistor (R ) and  
X
external capacitor (C ) control the timing and accuracy for the circuit. Adjustment of R and C provides a wide  
X
X
X
range of output pulse widths from the Q and Q terminals. The propagation delay from trigger input-to-output  
transition and the propagation delay from reset input-to-output transition are independent of R and C .  
X
X
Leading-edge triggering (A) and trailing-edge triggering (B) inputs are provided for triggering from either edge  
of the input pulse. An unused A input should be tied to GND and an unused B input should be tied to V . On  
CC  
power up, the IC is reset. Unused resets and sections must be terminated. In normal operation, the circuit  
retriggers on the application of each new trigger pulse. To operate in the nontriggerable mode, Q is connected  
to B when leading-edge triggering (A) is used, or Q is connected to A when trailing-edge triggering (B) is used.  
The period (τ) can be calculated from τ = (0.7) R , C ; R  
is 5 k. C  
is 0 pF.  
X
X
MIN  
MIN  
{
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
T
PACKAGE  
A
MARKING  
HC4538M  
HC4538M  
SOIC − M  
Tape and reel  
CD74HC4538QM96Q1  
CD74HC4538QPWRQ1  
−40°C to 125°C  
TSSOP − PW Tape and reel  
For the most current package and ordering information, see the Package Option Addendum at the  
end of this document, or see the TI web site at http://www.ti.com.  
Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.  
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 2008, Texas Instruments Incorporated  
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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