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Part: 74AC11239
Category:
Logic
-> Decoder/Demultiplexers
-> CMOS/BiCMOS->AC/ACT Family
Description: Dual 2-line to 4-line Decoder/demultiplexer
Company: Texas Instruments, Inc.
Datasheet: Download 74AC11239 datasheet File size : 232 kB
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Datasheet text preview:
74AC11239 DUAL 2LINE TO 4LINE DECODER/DEMULTIPLEXER
SCAS072A JULY 1989 REVISED APRIL 1993
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Designed Specifically for High-Speed Memory Decoders and Data Transmission Systems Incorporates Two Enable Inputs to Simplify Cascading and/or Data Reception Flow-Through Architecture to Optimize PCB Layout Center-Pin VCC and GND Configurations to Minimize High-Speed Switching Noise EPIC (Enhanced-Performance Implanted CMOS) 1-mm Process 500-mA Typical Latch-Up Immunity at 125°C Package Options Include Plastic Small Outline Packages, and Standard Plastic 300-mil DIPs
D OR N PACKAGE (TOP VIEW)
t
1Y1 1Y2 1Y3 GND 2Y0 2Y1 2Y2 2Y3
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
1Y0 1A 1B 1G VCC 2G 2A 2B
description
The 74AC11239 circuit is designed to be used in high-performance memory-decoding or data- routing applications requiring very short propagation delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of this decoder 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 decoder is negligible. The 74AC11239 is comprised of two individual two-line to four-line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications. These decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. The 74AC11239 is characterized for operation from 40°C to 85°C.
FUNCTION TABLE ENABLE INPUT G H L L L L SELECT INPUTS A X L H L H B X L L H H Y0 L H L L L OUTPUTS Y1 L L H L L Y2 L L L H L Y3 L L L L H
EPIC is a trademark of Texas Instruments Incorporated.
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.
Copyright © 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 POST OFFICE BOX 1443
· DALLAS, TEXAS 75265 · HOUSTON, TEXAS 772511443
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74AC11239 DUAL 2LINE TO 4LINE DECODER/DEMULTIPLEXER
SCAS072A JULY 1989 REVISED APRIL 1993
logic symbols (alternatives)
1A 1B 1G 15 14 13 X/Y 0 1 EN 0 1 2 3 10 9 11 16 1 2 3 1Y0 1Y1 1Y2 1Y3 10 9 11 1A 1B 1G 15 14 13 0 1 DMUX 0 3 0 1 2 3 16 1 2 3 1Y0 1Y1 1Y2 1Y3
G
2A 2B 2G
5 6 7 8
2Y0 2Y1 2Y2 2Y3
2A 2B 2G
5 6 7 8
2Y0 2Y1 2Y2 2Y3
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
16 13 1 1Y1 1Y0
Enable 1G
2 1A Select Inputs 1B 15 3
1Y2
14
1Y3 Data Outputs
5 11 6
2Y0
Enable 2G
2Y1
7 2A Select 2B 9 10 8
2Y2
2Y3
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 772511443
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74AC11239 DUAL 2LINE TO 4LINE DECODER/DEMULTIPLEXER
SCAS072A JULY 1989 REVISED APRIL 1993
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V Input clamp current, IIK (VI VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA Output clamp current, IOK (VO VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 200 mA Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
recommended operating conditions
MIN VCC VIH Supply voltage High-level input voltage VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V IOL Low-level output current Input transition rise or fall rate Operating free-air temperature VCC = 4.5 V VCC = 5.5 V 0 40 VCC = 4.5 V VCC = 5.5 V 0 0 3 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC 4 24 24 12 24 24 10 85 ns /V °C mA mA V V V V NOM 5 MAX 5.5 UNIT V
Dt/Dv
TA
POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 772511443
·
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74AC11239 DUAL 2LINE TO 4LINE DECODER/DEMULTIPLEXER
SCAS072A JULY 1989 REVISED APRIL 1993
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS CONDITIONS VCC 3V IOH = 50 mA IOH = 4 mA IOH = 24 mA mA IOH = 50 mA{ IOH = 75 mA{ IOL = 50 mA IOL = 12 mA IOL = 24 mA 24 mA IOL = 50 mA{ IOL = 75 mA{ II ICC Ci VI = VCC or GND VI = VCC or GND, VI = VCC or GND IO = 0 4.5 V 5.5 V VOH 3V 4.5 V 5.5 V 5.5 V 5.5 V 3V 4.5 V 5.5 V VOL 3V 4.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5V 3.5 ± 0.1 8 1.65 ±1 80 0.1 0.1 0.1 0.36 0.36 0.36 3.85 0.1 0.1 0.1 0.44 0.44 0.44 V MIN 2.9 4.4 5.4 2.58 3.94 4.94 TA = 25°C TYP MAX MIN 2.9 4.4 5.4 2.48 3.8 4.8 V MAX UNIT
mA mA
pF
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER tPLH tPHL tPLH tPHL FROM (INPUT) A or B or TO (OUTPUT) Y Y MIN 1.5 1.5 1.5 1.5 TA = 25°C TYP MAX 6.2 5.6 5.4 5.7 8.5 8 7.1 7.3 MIN 1.5 1.5 1.5 1.5 MAX 9.5 9 7.9 8.1 UNIT ns ns
G
switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER tPLH tPHL tPLH tPHL FROM (INPUT) A or B or TO (OUTPUT) Y Y TA = 25°C MIN TYP MAX 1.5 1.5 1.5 1.5 4 3.7 3.5 3.9 6.1 6.1 5.3 5.6 MIN 1.5 1.5 1.5 1.5 MAX 6.7 6.8 5.8 6.2 UNIT ns ns
G
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER Cpd Power dissipation capacitance TEST CONDITIONS CL = 50 pF, f = 1 MHz TYP 48 UNIT pF
4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 772511443
·
·
74AC11239 DUAL 2LINE TO 4LINE DECODER/DEMULTIPLEXER
SCAS072A JULY 1989 REVISED APRIL 1993
PARAMETER MEASUREMENT INFORMATION
From Output Under Test CL = 50 pF (see Note A) 500
LOAD CIRCUIT VCC 50% 50% 0 tPLH tPHL VOH Output 50% PROPAGATION DELAY TIMES NOTES: A. CL includes probe and jig capacitance. B. Input pulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50 , tr = 3 ns, tf = 3 ns. C. The outputs are measured one at a time with one input transition per measurement. 50% VOL
Input (see Note B)
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 772511443
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