Használati útmutató Texas Instruments CD74HCT4538M96
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1
Data sheet acquired from Harris Semiconductor
SCHS123E
Features
•Retriggerable/Resettable Capability
•Trigger and Reset Propagation Delays Independent of
RX, CX
•Triggering from the Leading or Trailing Edge
•Q andQ Buered Outputs Available
•Separate Resets
•Wide Range of Output Pulse Widths
•Schmitt Trigger Input on A andB Inputs
•Retrigger Time is Independent of CX
•Fanout (Over Temperature Range)
-Standard Outputs. . . . . . . . . . . . . . .10 LSTTL Loads
-Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
•Wide Operating Temperature Range . . .-55oC to 125oC
•Balanced Propagation Delay and Transition Times
•Significant Power Reduction Compared to LSTTL
Logic ICs
•HC Types
-2V to 6V Operation
-High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
•HCT Types
-4.5V to 5.5V Operation
-Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
-CMOS Input Compatibility, Il≤µ1A at VOL, VOH
Pinout
CD54HC4538, CD54HCT4538
(CERDIP)
CD74HC4538
(PDIP, SOIC, SOP, TSSOP)
CD74HCT4538
(PDIP, SOIC)
TOP VIEW
Description
The’HC4538and’HCT4538aredual
retriggerable/resettablemonostableprecisionmultivibrators
forfixedvoltagetimingapplications.Anexternalresistor
(RX )andanexternalcapacitor(CX )controlthetimingand
theaccuracyforthecircuit.AdjustmentofRXandCX
providesa wide range of output pulsewidths from theQ and
Qterminals.Thepropagationdelayfromtriggerinput-to-
output transitionandthe propagationdelay fromresetinput-
to-output transition are independent of R
X and CX.
Leading-edgetriggering(A)andtrailingedgetriggering(B)
inputsareprovidedfortriggeringfromeitheredgeofthe
inputpulse. Anunused“A”inputshouldbetiedtoGNDand
anunused BshouldbetiedtoVCC .OnpoweruptheICis
reset.Unusedresetsandsectionsmustbeterminated.In
normaloperationthecircuitretriggersontheapplicationof
eachnewtriggerpulse.Tooperateinthenon-triggerable
mode QisconnectedtoBwhenleadingedgetriggering(A)
isusedorQisconnectedtoAwhentrailingedgetriggering
( B)isused.Theperiod()canbecalculatedfrom=(0.7)τ τ
RX, CX; RMIN is 5k. CΩMIN is 0pF.
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
1C
X
1R
X
C
X
1R
1A
1B
1Q
GND
1Q
V
CC
2R
X
C
X
2R
2A
2B
2Q
2Q
2C
X
Ordering Information
PART NUMBER
TEMP. RANGE
(oC)PACKAGE
CD54HC4538F3A-55 to 12516 Ld CERDIP
CD54HCT4538F3A-55 to 12516 Ld CERDIP
CD74HC4538E-55 to 12516 Ld PDIP
CD74HC4538M-55 to 12516 Ld SOIC
CD74HC4538MT-55 to 12516 Ld SOIC
CD74HC4538M96-55 to 12516 Ld SOIC
CD74HC4538NSR-55 to 12516 Ld SOP
CD74HC4538PW-55 to 12516 Ld TSSOP
CD74HC4538PWR-55 to 12516 Ld TSSOP
CD74HC4538PWT-55 to 12516 Ld TSSOP
CD74HCT4538E-55 to 12516 Ld PDIP
CD74HCT4538M-55 to 12516 Ld SOIC
CD74HCT4538MT-55 to 12516 Ld SOIC
CD74HCT4538M96-55 to 12516 Ld SOIC
NOTE:Whenordering,usetheentire partnumber.The suffixes 96
andRdenotetapeandreel.ThesuffixTdenotesasmall-quantity
reel of 250.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
CD54HC4538, CD74HC4538,
CD54HCT4538, CD74HCT4538
High-Speed CMOS Logic Dual Retriggerable
Precision Monostable Multivibrator
[ /Title
(CD54
HC453
8,
CD74
HC453
8,
CD74
HCT45
38)
/Sub-
ject
(High
Speed
CMOS
Logic
June 1998 - Revised October 2003
Termékspecifikációk
| Márka: | Texas Instruments |
| Kategória: | nincs kategorizálva |
| Modell: | CD74HCT4538M96 |
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