C0083C0078C0053C0052C0072C0067C0050C0053C0055C0044 C0083C0078C0053C0052C0072C0067C0050C0053C0056C0044 C0083C0078C0055C0052C0072C0067C0050C0053C0055C0044 C0083C0078C0055C0052C0072C0067C0050C0053C0056
C0081C0085C0065C0068C0082C0085C0080C0076C0069 C0050C0262C0076C0073C0078C0069 C0084C0079 C0049C0262C0076C0073C0078C0069 C0068C0065C0084C0065 C0083C0069C0076C0069C0067C0084C0079C0082C0083C0047C0077C0085C0076C0084C0073C0080C0076C0069C0088C0069C0082C0083
C0087C0073C0084C0072 C0051C0262C0083C0084C0065C0084C0069 C0079C0085C0084C0080C0085C0084C0083
SCLS224B − DECEMBER 1982 − REVISED SEPTEMBER 2003
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 Wide Operating Voltage Range of 2 V to 6 V
C0068 High-Current Inverting Outputs Drive Up To
15 LSTTL Loads
C0068 Low Power Consumption, 80-µA Max I
CC
C0068 ’HC257 ...Typical t
pd
= 9 ns
C0068 ’HC258 ...Typical t
pd
= 12 ns
C0068 ±6-mA Output Drive at 5 V
C0068 Low Input Current of 1 µA Max
C0068 Provides Bus Interface from Multiple
Sources in High-Performance Systems
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
V
CC
G
4A
4B
4Y
3A
3B
3Y
SN54HC257, SN54HC258...J PACKAGE
SN74HC257, SN74HC258...D, N, NS, OR PW PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
4A
4B
NC
4Y
3A
SN54HC257, SN54HC258...FK PACKAGE
(TOP VIEW)
1A A/B NC
3Y 3B
V G
2Y
GND
NC
CC
NC − No internal connection
1B
1Y
NC
2A
2B
description/ordering information
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N Tube of 25
SN74HC257N SN74HC257N
SN74HC258N SN74HC258N
Tube of 40 SN74HC257D
Reel of 2500 SN74HC257DR
HC257
SOIC − D
Reel of 250 SN74HC257DT
Tube of 40 SN74HC258D
HC258
Reel of 2500 SN74HC258DR
−40°C to 85°C
SOP − NS Reel of 2000
SN74HC257NSR HC257
SN74HC258NSR HC258
Tube of 90 SN74HC257PW
Reel of 2000 SN74HC257PWR
HC257
TSSOP − PW
Reel of 250 SN74HC257PWT
Tube of 90 SN74HC258PW
Reel of 2000 SN74HC258PWR
HC258
Reel of 250 SN74HC258PWT
CDIP − J Tube of 25
SNJ54HC257J SNJ54HC257J
−55°C to 125°C
SNJ54HC258J SNJ54HC258J
LCCC − FK Tube of 55
SNJ54HC257FK SNJ54HC257FK
SNJ54HC258FK SNJ54HC258FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Copyright  2003, Texas Instruments IncorporatedC0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046
C0080C0114C0111C0100C0117C0099C0116C0115 C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115
C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046 C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101
C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
C0079C0110 C0112C0114C0111C0100C0117C0099C0116C0115 C0099C0111C0109C0112C0108C0105C0097C0110C0116 C0116C0111 C0077C0073C0076C0262C0080C0082C0070C0262C0051C0056C0053C0051C0053C0044 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115 C0097C0114C0101 C0116C0101C0115C0116C0101C0100
C0117C0110C0108C0101C0115C0115 C0111C0116C0104C0101C0114C0119C0105C0115C0101 C0110C0111C0116C0101C0100C0046 C0079C0110 C0097C0108C0108 C0111C0116C0104C0101C0114 C0112C0114C0111C0100C0117C0099C0116C0115C0044 C0112C0114C0111C0100C0117C0099C0116C0105C0111C0110
C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101 C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046