900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






etcTI

SN74HCT138 Datasheet Preview

SN74HCT138 Datasheet

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXER

No Preview Available !

SN54HCT138, SN74HCT138
3ĆLINE TO 8ĆLINE DECODERS/DEMULTIPLEXERS
D Operating Voltage Range of 4.5 V to 5.5 V
D Outputs Can Drive Up To 10 LSTTL Loads
D Low Power Consumption, 80-µA Max ICC
D Typical tpd = 17 ns
D ±4-mA Output Drive at 5 V
SN54HCT138 . . . J OR W PACKAGE
SN74HCT138 . . . D, N, NS, OR PW PACKAGE
(TOP VIEW)
SCLS171E − MARCH 1984 − REVISED SEPTEMBER 2003
D Low Input Current of 1 µA Max
D Inputs Are TTL-Voltage Compatible
D Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
D Incorporate Three Enable Inputs to Simplify
Cascading and/or Data Reception
SN54HCT138 . . . FK PACKAGE
(TOP VIEW)
A1
B2
C3
G2A 4
G2B 5
G1 6
Y7 7
GND 8
16 VCC
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
C
G2A
NC
G2B
G1
3 2 1 20 19
4
18
Y1
5
17 Y2
6
16 NC
7
15 Y3
8
14 Y4
9 10 11 12 13
description/ordering information
NC − No internal connection
The ’HCT138 devices are designed for high-performance memory-decoding or data-routing applications
requiring very short propagation delay times. In high-performance memory systems, these decoders can
minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable
circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical
access time of the memory. This means that the effective system delay introduced by the decoders is negligible.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 25
SN74HCT138N
SN74HCT138N
Tube of 40
SN74HCT138D
−40°C to 85°C
SOIC − D
SOP − NS
Reel of 2500
Reel of 250
Reel of 2000
SN74HCT138DR
SN74HCT138DT
SN74HCT138NSR
HCT138
HCT138
Tube of 90
SN74HCT138PW
TSSOP − PW
Reel of 2000 SN74HCT138PWR
HT138
Reel of 250
SN74HCT138PWT
CDIP − J
Tube of 25
SNJ54HCT138J
SNJ54HCT138J
−55°C to 125°C CFP − W
Tube of 150
SNJ54HCT138W
SNJ54HCT138W
LCCC − FK
Tube of 55
SNJ54HCT138FK
SNJ54HCT138FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2003, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
1




etcTI

SN74HCT138 Datasheet Preview

SN74HCT138 Datasheet

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXER

No Preview Available !

SN54HCT138, SN74HCT138
3ĆLINE TO 8ĆLINE DECODERS/DEMULTIPLEXERS
SCLS171E − MARCH 1984 − REVISED SEPTEMBER 2003
description/ordering information (continued)
The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two
active-low (G) and one active-high (G) enable inputs reduce the need for external gates or inverters when
expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires
only one inverter. An enable input can be used as a data input for demultiplexing applications.
FUNCTION TABLE
ENABLE
INPUTS
SELECT
OUTPUTS
G1 G2A G2B C
B
A
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
H
X
X
X
H
H
H
H
H
H
H
H
L
X
X
X
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
L
H
H
H
H
H
L
H
H
H
H
H
L
L
H
L
L
H
H
H
H
L
H
H
H
H
L
L
H
L
H
H
H
H
H
H
L
H
H
H
L
L
H
H
L
H
H
H
H
H
H
L
H
H
L
L
H
H
H
H
H
H
H
H
H
H
L
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74HCT138
Description 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXER
Maker etcTI
Total Page 3 Pages
PDF Download

SN74HCT138 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 SN74HCT138 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXER
etcTI
2 SN74HCT139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXER
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy