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CD74HC237MTE4 PDF预览

CD74HC237MTE4

更新时间： 2024-11-21 05:18:15
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页数 文件大小 规格书
19页 528K
描述
High-Speed CMOS Logic, 3- to 8-Line Decoder/Demultiplexer with Address Latches

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CD74HC237MTE4 数据手册

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CD74HC137, CD74HCT137,  
CD54HC237, CD74HC237,  
Data sheet acquired from Harris Semiconductor  
SCHS146F  
CD74HCT237  
High-Speed CMOS Logic, 3- to 8-Line  
Decoder/Demultiplexer with Address Latches  
March 1998 - Revised October 2003  
Both circuits have three binary select inputs (A0, A1 and A2)  
that can be latched by an active High Latch Enable (LE)  
signal to isolate the outputs from select-input changes. A  
“Low” LE makes the output transparent to the input and the  
circuit functions as a one-of-eight decoder. Two Output  
Features  
• Select One of Eight Data Outputs  
- Active Low for CD74HC137 and CD74HCT137  
- Active High for ’HC237 and CD74HCT237  
[ /Title  
(CD74  
HC137  
,
CD74  
HCT13  
7,  
CD74  
HC237  
,
CD74  
HCT23  
7)  
Enable inputs (OE and OE ) are provided to simplify  
1
to  
0
• l/O Port or Memory Selector  
cascading  
and  
facilitate  
demultiplexing.  
The  
demultiplexing function is accomplished by using the A , A ,  
0
1
• Two Enable Inputs to Simplify Cascading  
A inputs to select the desired output and using one of the  
2
• Typical Propagation Delay of 13ns at V  
o
= 5V,  
other Output Enable inputs as the data input while holding  
the other Output Enable input in its active state. In the  
CD74HC137 and CD74HCT137 the selected output is a  
“Low”; in the ’HC237 and CD74HCT237 the selected output is  
a “High”.  
CC  
15pF, T = 25 C (CD74HC237)  
A
• Fanout (Over Temperature Range)  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads  
o
o
Ordering Information  
• Wide Operating Temperature Range . . . -55 C to 125 C  
• Balanced Propagation Delay and Transition Times  
TEMP. RANGE  
o
PART NUMBER  
CD54HC237F3A  
CD74HC137E  
( C)  
PACKAGE  
16 Ld CERDIP  
16 Ld PDIP  
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  
-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  
/Sub-  
ject  
(High  
Speed  
• HC Types  
- 2V to 6V Operation  
CD74HC137PW  
CD74HC137PWR  
CD74HC137PWT  
CD74HC237E  
- High Noise Immunity: N = 30%, N = 30%, of V  
IL IH  
CC  
at V  
= 5V  
CC  
• HCT Types  
- 4.5V to 5.5V Operation  
- Direct LSTTL Input Logic Compatibility,  
V = 0.8V (Max), V = 2V (Min)  
IL IH  
CD74HC237M  
- CMOS Input Compatibility, I ≤ 1µA at V , V  
l
OL OH  
CD74HC237MT  
CD74HC237M96  
CD74HC237NSR  
CD74HC237PW  
CD74HC237PWR  
CD74HC237PWT  
CD74HCT137E  
CD74HCT137MT  
CD74HCT137M96  
CD74HCT237E  
Description  
The  
CD74HC137,  
CD74HCT137,  
’HC237,  
and  
CD74HCT237 are high speed silicon gate CMOS decoders  
well suited to memory address decoding or data routing  
applications. Both circuits feature low power consumption  
usually associated with CMOS circuitry, yet have speeds  
comparable to low power Schottky TTL logic.  
16 Ld TSSOP  
16 Ld TSSOP  
16 Ld TSSOP  
16 Ld PDIP  
16 Ld SOIC  
16 Ld SOIC  
16 Ld PDIP  
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.  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
Copyright © 2003, Texas Instruments Incorporated  
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