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CD74HCT243 PDF预览

CD74HCT243

更新时间: 2024-11-18 23:04:31
品牌 Logo 应用领域
德州仪器 - TI 总线收发器
页数 文件大小 规格书
7页 51K
描述
High Speed CMOS Logic Quad-Bus Transceiver with Three-State Outputs

CD74HCT243 数据手册

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CD74HCT242 was not acquired from Harris Semiconductor.  
CD74HCT242, CD74HC243,  
CD74HCT243  
Data sheet acquired from Harris Semiconductor  
SCHS168  
High Speed CMOS Logic  
Quad-Bus Transceiver with Three-State Outputs  
November 1997  
Features  
Description  
• Typical Propagation Delay (A to B, B to A) of 7ns at  
The Harris CD74HCT242, CD74HC243 and CD74HCT243  
silicon-gate CMOS three-state bidirectional inverting and  
non-inverting buffers are intended for two-way asynchronous  
communication between data buses. They have high drive  
current outputs which enable high-speed operation when  
driving large bus capacitances. These circuits possess the  
low power dissipation of CMOS circuits, and have speeds  
o
V
= 5V, C = 15pF, T = 25 C  
CC  
L A  
[ /Title  
(CD74  
HCT24  
2,  
• Three-State Outputs  
• Buffered Inputs  
• Fanout (Over Temperature Range)  
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads  
CD74  
HC243  
,
CD74  
HCT24  
3)  
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads comparable to low power Schottky TTL circuits. They can  
o
o
drive 15 LSTTL loads.  
• Wide Operating Temperature Range . . . -55 C to 125 C  
• Balanced Propagation Delay and Transition Times  
The CD74HCT242 is an inverting buffer; the CD74HC243  
and CD74HCT243 are non-inverting buffers.  
• Significant Power Reduction Compared to LSTTL  
Logic ICs  
The states of the output enables (OEB, OEA) determine  
both the direction of flow (A to B, B to A), and the three-state  
mode.  
• HC Types  
- 2V to 6V Operation  
/Sub-  
ject  
- High Noise Immunity: N = 30%, N = 30% of V  
IL IH CC  
at V  
= 5V  
Ordering Information  
CC  
(High  
Speed  
CMOS  
Logic  
Quad-  
• HCT Types  
- 4.5V to 5.5V Operation  
- Direct LSTTL Input Logic Compatibility,  
TEMP. RANGE  
PKG.  
NO.  
o
PART NUMBER  
CD74HC243E  
CD74HC243M  
CD74HCT243M  
NOTES:  
( C)  
PACKAGE  
14 Ld PDIP  
14 Ld SOIC  
14 Ld SOIC  
V = 0.8V (Max), V = 2V (Min)  
IL IH  
-55 to 125  
-55 to 125  
-55 to 125  
E14.3  
- CMOS Input Compatibility, I 1µA at V , V  
l
OL OH  
M14.15  
M14.15  
Pinout  
CD74HCT242, CD74HC243, CD74HCT243  
1. When ordering, use the entire part number. Add the suffix 96 to  
obtain the variant in the tape and reel.  
(PDIP, SOIC)  
TOP VIEW  
2. Wafer or die for this part number is available which meets all elec-  
trical specifications. Please contact your local sales  
OEB  
NC  
A0  
1
2
3
4
5
6
7
14 V  
CC  
13 OEA  
12 NC  
11 B0  
A1  
A2  
10 B1  
A3  
9
8
B2  
B3  
GND  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
File Number 1488.1  
Copyright © Harris Corporation 1997  
1

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