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CD74HC4538QPWRQ1 датащи(PDF) 1 Page - Texas Instruments

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номер детали CD74HC4538QPWRQ1
подробное описание детали  HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

CD74HC4538QPWRQ1 датащи(HTML) 1 Page - Texas Instruments

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CD74HC4538-Q1
HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE
PRECISION MONOSTABLE MULTIVIBRATOR
SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Qualified for Automotive Applications
D Retriggerable/Resettable Capability
D Trigger and Reset Propagation Delays
Independent of RX, CX
D Triggering From the Leading or Trailing
Edge
D Q and Q Buffered Outputs Available
D Separate Resets
D Wide Range of Output Pulse Widths
D Schmitt-Trigger Input on A and B Inputs
D Retrigger Time Is Independent of C
X
D Fanout (Over Temperature Range)
− Standard Outputs ... 10 LSTTL Loads
− Bus Driver Outputs ... 15 LSTTL Loads
D Balanced Propagation Delay and Transition
Times
D Significant Power Reduction Compared to
LSTTL Logic ICs
D V
CC Voltage = 2 V to 6 V
D High Noise Immunity N
IL or NIH = 30% of
VCC, VCC = 5 V
description/ordering information
The CD74HC4538 is a dual retriggerable/resettable
precision monostable multivibrator for fixed-voltage
timing applications. An external resistor (RX) and
external capacitor (CX) control the timing and accuracy for the circuit. Adjustment of RX and CX provides a wide
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 RX and CX.
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 VCC. On
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) RX, CX; RMIN is 5 kΩ. CMIN is 0 pF.
ORDERING INFORMATION{
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
40
°Cto125°C
SOIC − M
Tape and reel
CD74HC4538QM96Q1
HC4538M
−40
°C to 125°C
TSSOP − PW
Tape and reel
CD74HC4538QPWRQ1
HC4538M
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.
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.
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.
M OR PW PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1CX
1RXCX
1R
1A
1B
1Q
1Q
GND
VCC
2CX
2RXCX
2R
2A
2B
2Q
2Q


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