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CD74HC123NSRE4 PDF预览

CD74HC123NSRE4

更新时间: 2024-11-01 05:18:11
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描述
High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

CD74HC123NSRE4 数据手册

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CD54/74HC123, CD54/74HCT123,  
CD74HC423, CD74HCT423  
Data sheet acquired from Harris Semiconductor  
SCHS142F  
High-Speed CMOS Logic Dual Retriggerable  
Monostable Multivibrators with Resets  
September 1997 - Revised October 2003  
Features  
Ordering Information  
• Overriding Reset Terminates Output Pulse  
• Triggering From the Leading or Trailing Edge  
• Q and Q Buffered Outputs  
o
PART NUMBER  
CD54HC123F3A  
CD54HCT123F3A  
CD74HC123E  
TEMP. RANGE ( C)  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
-55 to 125  
PACKAGE  
16 Ld CERDIP  
16 Ld CERDIP  
16 Ld PDIP  
16 Ld SOIC  
16 Ld SOIC  
16 Ld SOIC  
16 Ld SOP  
[ /Title  
(CD74  
HC123  
,
CD74  
HCT12  
3,  
CD74  
HC423  
,
CD74  
HCT42  
3)  
• Separate Resets  
• Wide Range of Output-Pulse Widths  
• Schmitt Trigger on Both A and B Inputs  
• Fanout (Over Temperature Range)  
CD74HC123M  
CD74HC123MT  
CD74HC123M96  
CD74HC123NSR  
CD74HC123PW  
CD74HC123PWR  
CD74HC123PWT  
CD74HC423E  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads  
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C  
• Balanced Propagation Delay and Transition Times  
16 Ld TSSOP  
16 Ld TSSOP  
16 Ld TSSOP  
16 Ld PDIP  
16 Ld SOIC  
16 Ld SOIC  
16 Ld SOIC  
16 Ld SOP  
• Significant Power Reduction Compared to LSTTL  
Logic ICs  
• HC Types  
- 2V to 6V Operation  
CD74HC423M  
- High Noise Immunity: N = 30%, N = 30%of V  
IL IH  
at  
/Sub-  
ject  
(High  
Speed  
CC  
CD74HC423MT  
CD74HC423M96  
CD74HC423NSR  
CD74HCT123E  
CD74HCT123M  
CD74HCT123MT  
CD74HCT123M96  
CD74HCT423E  
CD74HCT423MT  
CD74HCT423M96  
V
= 5V  
CC  
• HCT Types  
- 4.5V to 5.5V Operation  
- Direct LSTTL Input Logic Compatibility,  
16 Ld PDIP  
16 Ld SOIC  
16 Ld SOIC  
16 Ld SOIC  
16 Ld PDIP  
16 Ld SOIC  
16 Ld SOIC  
V = 0.8V (Max), V = 2V (Min)  
IL IH  
- CMOS Input Compatibility, I 1µA at V , V  
OL OH  
l
Description  
The ’HC123, ’HCT123, CD74HC423 and CD74HCT423 are  
dual monostable multivibrators with resets. They are all  
retriggerable and differ only in that the 123 types can be  
triggered by a negative to positive reset pulse; whereas the  
423 types do not have this feature. An external resistor (R )  
X
and an external capacitor (C ) control the timing and the  
X
NOTE: When ordering, use the entire part number. The suffixes 96  
and R denote tape and reel. The suffix T denotes a small-quantity  
reel of 250.  
accuracy for the circuit. Adjustment of Rx and C provides a  
X
wide range of output pulse widths from the Q and Q  
terminals. Pulse triggering on the A and B inputs occur at a  
particular voltage level and is not related to the rise and fall  
times of the trigger pulses.  
Once triggered, the output pulse width may be extended by  
retriggering inputs A and B. The output pulse can be  
terminated by a LOW level on the Reset (R) pin. Trailing  
edge triggering (A) and leading edge triggering (B) inputs  
are provided for triggering from either edge of the input  
pulse. If either Mono is not used each input on the unused  
device (A, B, and R) must be terminated high or low.  
The minimum value of external resistance, Rx is typically  
5k. The minimum value external capacitance, CX, is 0pF.  
The calculation for the pulse width is t = 0.45 R C at  
W
X X  
V
= 5V.  
CC  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
Copyright © 2003, Texas Instruments Incorporated  
1

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