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CD74ACT257

更新时间： 2024-09-12 23:00:39
品牌 Logo 应用领域
德州仪器 - TI 复用器
页数 文件大小 规格书
8页 42K
描述
Quad 2-Input Multiplexer with Three-State Outputs

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CD74ACT257 数据手册

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CD74AC257, CD74ACT257,  
CD74ACT258  
Data sheet acquired from Harris Semiconductor  
SCHS248  
Quad 2-Input Multiplexer  
with Three-State Outputs  
August 1998  
Features  
Description  
• CD74AC257, CD74ACT257 . . . . Non-Inverting Outputs The CD74AC257, CD74ACT257 and CD74ACT258 are  
quad 2-input multiplexers with three-state outputs that utilize  
the Harris Advanced CMOS Logic technology. Each of these  
• CD74ACT258 . . . . . . . . . . . . . . . . . . . Inverting Outputs  
devices selects four bits of data from two sources under the  
control of a common Select input (S). The Output Enable  
(OE) is active LOW. When OE is HIGH, all of the outputs (Y  
or Y) are in the high-impedance state regardless of all other  
input conditions.  
• Buffered Inputs  
• Typical Propagation Delay  
o
- 4.4ns at V  
CC  
= 5V, T = 25 C, C = 50pF  
A L  
• Exceeds 2kV ESD Protection MIL-STD-883, Method  
3015  
Moving data from two groups of registers to four common  
output buses is a common use of the CD74AC257,  
CD74ACT257 and CD74ACT258. The state of the Select  
input determines the particular register from which the data  
comes. The CD74AC257, CD74ACT257 and CD74ACT258  
can also be used as function generators.  
• SCR-Latchup-Resistant CMOS Process and Circuit  
Design  
• Speed of Bipolar FAST™/AS/S with Significantly  
Reduced Power Consumption  
• Balanced Propagation Delays  
Ordering Information  
• AC Types Feature 1.5V to 5.5V Operation and  
Balanced Noise Immunity at 30% of the Supply  
PART  
TEMP.  
PKG.  
NO.  
o
NUMBER  
RANGE ( C)  
PACKAGE  
• ±24mA Output Drive Current  
o
- Fanout to 15 FAST™ ICs  
CD74AC257E  
CD74ACT257E  
CD74ACT258E  
CD74AC257M  
0 to 70 C, -40 to 85, 16 Ld PDIP  
-55 to 125  
E16.3  
Drives 50Ω Transmission Lines  
o
0 to 70 C, -40 to 85, 16 Ld PDIP  
E16.3  
-55 to 125  
o
0 to 70 C, -40 to 85, 16 Ld PDIP  
E16.3  
Pinout  
-55 to 125  
CD74AC257, CD74ACT257, CD74ACT258  
(PDIP, SOIC)  
o
0 to 70 C, -40 to 85, 16 Ld SOIC  
M16.15  
M16.15  
M16.15  
-55 to 125  
TOP VIEW  
o
CD74ACT257M 0 to 70 C, -40 to 85, 16 Ld SOIC  
-55 to 125  
ACT258  
S
AC/ACT257  
S
AC/ACT257 ACT258  
16 V  
o
1
2
3
4
5
6
7
8
V
CD74ACT258M 0 to 70 C, -40 to 85, 16 Ld SOIC  
CC  
15 OE  
CC  
-55 to 125  
1I  
1I  
1I  
1I  
OE  
0
1
0
1
NOTES:  
14 4I  
13 4I  
4I  
4I  
0
1
0
1
1. When ordering, use the entire part number. Add the suffix 96 to  
obtain the variant in the tape and reel.  
1Y  
1Y  
2I  
2I  
2I  
2I  
12 4Y  
4Y  
0
1
0
1
2. Wafer and die for this part number is available which meets all elec-  
trical specifications. Please contact your local sales office or Harris  
customer service for ordering information.  
11 3I  
10 3I  
3I  
3I  
0
1
0
1
2Y  
2Y  
9
3Y  
3Y  
GND  
GND  
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.  
FAST™ is a Trademark of Fairchild Semiconductor.  
Copyright © Harris Corporation 1998  
File Number 1955.1  
1
12345678

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CD74ACT257 替代型号

型号 品牌 替代类型 描述 数据表
CD54ACT257 TI

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