Texas Instruments SN74HC138D Handleiding


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SNx4HC138 3-Line To 8-Line Decoders/Demultiplexers
1 Features
• Targeted Specifically for High-Speed Memory
Decoders and Data-Transmission Systems
• Wide Operating Voltage Range (2 V to 6 V)
• Outputs Can Drive Up To 10 LSTTL Loads
• Low Power Consumption, 80-µA Maximum ICC
• Typical tpd = 15 ns
• ±4-mA Output Drive at 5 V
• Low Input Current of 1-µA Maximum
• Active Low Outputs ( Selected Output is Low)
• Incorporate Three Enable Inputs to Simplify
Cascading or Data Reception
2 Applications
• LED Displays
• Servers
• White Goods
• Power Infrastructure
• Building Automation
• Factory Automation
3 Description
The SNx4HC138 devices are designed to be used
in high-performance memory-decoding or data-routing
applications requiring very short propagation delay
times. In high-performance memory systems, these
decoders can be used to minimize the effects of
system decoding. When employed with high-speed
memories using a fast enable circuit, the delay times
of these decoders and the enable time of the memory
are usually less than the typical access time of the
memory. This means that the effective system delay
introduced by the decoders is negligible.
Device Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
SN74HC138D SOIC (16) 9.90 mm x 3.90 mm
SN74HC138DB SSOP (16) 6.20 mm x 5.30 mm
SN74HC138N PDIP (16) 19.32 mm x 6.35 mm
SN74HC138NS SO (16) 10.20 mm x 5.30 mm
SN74HC138PW TSSOP (16) 5.00 mm x 4.40 mm
SN54HC138J CDIP (16) 21.34 mm x 6.92 mm
SN54HC138W CFP (16) 10.16 mm x 6.73 mm
SN54HC138FK LCCC (20) 8.89 mm x 8.89 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Pin numbers shown are for the D, DB, J, N, NS, PW, and W packages.
Functional Block DIagram
SN54HC138, SN74HC138
SCLS107G – DECEMBER 1982 – REVISED OCTOBER 2021
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
Pin Functions.................................................................... 3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings........................................ 4
6.2 ESD Ratings: SN74HC138......................................... 4
6.3 Recommended Operating Conditions.........................4
6.4 Thermal Information: SN74HC138..............................5
6.5 Thermal Information: SN54HC138..............................5
6.6 Electrical Characteristics.............................................5
6.7 Electrical Characteristics: SN74HC138...................... 6
6.8 Electrical Characteristics: SN54HC138...................... 6
6.9 Switching Characteristics............................................6
6.10 Switching Characteristics: SN74HC138....................7
6.11 Switching Characteristics: SN54HC138....................7
6.12 Typical Characteristic................................................7
7 Parameter Measurement Information............................ 8
8 Detailed Description........................................................9
8.1 Overview.....................................................................9
8.2 Functional Block Diagram........................................... 9
8.3 Feature Description.....................................................9
8.4 Device Functional Modes..........................................10
9 Application and Implementation.................................. 11
9.1 Application Information..............................................11
9.2 Typical Application.................................................... 11
10 Power Supply Recommendations..............................12
11 Layout........................................................................... 12
11.1 Layout Guidelines................................................... 12
11.2 Layout Example...................................................... 12
12 Device and Documentation Support..........................13
12.1 Documentation Support.......................................... 13
12.2 Related Links.......................................................... 13
12.3 Receiving Notification of Documentation Updates..13
12.4 Support Resources................................................. 13
12.5 Trademarks............................................................. 13
12.6 Electrostatic Discharge Caution..............................13
12.7 Glossary..................................................................13
13 Mechanical, Packaging, and Orderable
Information.................................................................... 13
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (September 2003) to Revision F (September 2016) Page
• Added table, section, , ESD Ratings Feature Description Device Functional Modes Application and
Implementation Power Supply Recommendations Layout Device and section, section, section,
Documentation Support Mechanical, Packaging, and Orderable Information section, and section................... 1
• Deleted Ordering Information table; see POA at the end of the data sheet....................................................... 1
• Changed RθJA values from 73 to 87.3 (D), from 82 to 104.3 (DB), from 67 to 54.8 (N), from 64 to 91.1 (NS),
and from 108 to 114.6 (PW)................................................................................................................................5
Changes from Revision F (September 2016) to Revision G (October 2021) Page
• Updated the ESD ratings table to fit modern data sheet standards....................................................................4
SN54HC138, SN74HC138
SCLS107G – DECEMBER 1982 – REVISED OCTOBER 2021 www.ti.com
2Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated
Product Folder Links: SN54HC138 SN74HC138
5 Pin Configuration and Functions
SOIC, SSOP, PDIP, SO, TSSOP, CDIP, or CFP
Package
16-Pin D, DB, N, NS, PW, J or W
Top View
NC: No internal connection
LCCC Package
20-Pin FK
Top View
Pin Functions
PIN
I/O(1) DESCRIPTION
NAME SOIC, SSOP, PDIP, SO,
TSSOP, CDIP, CFP LCCC
A 1 2 I Select input A (least significant bit)
B 2 3 I Select input B
C 3 4 I Select input C (most significant bit)
G2A 4 5 I Active low enable A
G2B 5 7 I Active low enable B
G1 6 8 I Active high enable
GND 8 10 — Ground
NC — 1, 6, 11, 16 — No internal connection
VCC 16 20 — Supply voltage
Y0 15 19 O Output 0 (least significant bit)
Y1 14 18 O Output 1
Y2 13 17 O Output 2
Y3 12 15 O Output 3
Y4 11 14 O Output 4
Y5 10 13 O Output 5
Y6 9 12 O Output 6
Y7 7 9 O Output 7 (most significant bit)
(1) Signal Types: I = Input, O = Output, I/O = Input or Output.
www.ti.com
SN54HC138, SN74HC138
SCLS107G – DECEMBER 1982 – REVISED OCTOBER 2021
Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 3
Product Folder Links: SN54HC138 SN74HC138


Product specificaties

Merk: Texas Instruments
Categorie: Niet gecategoriseerd
Model: SN74HC138D
Breedte: 10 mm
Diepte: 4 mm
Hoogte: 1.5 mm
Breedte verpakking: 8 mm
Diepte verpakking: 507 mm
Hoogte verpakking: 3.94 mm
Soort: Logic IC
Type verpakking: SOIC
Aantal per verpakking: 40 stuk(s)
Temperatuur bij opslag: -65 - 150 °C
Bedrijfstemperatuur (T-T): -40 - 85 °C
Aantal pinnen: 16
Breedte (met pennen): 10 mm
Diepte (met pennen): 6.2 mm
Hoogte (met pennen): 1.75 mm

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