SN74AHC139_15 Datasheet, PDF (1/22 Pages) Texas Instruments – DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS

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SN74AHC139
SN54AHC139
SCLS259L – DECEMBER 1995 – REVISED JUNE 2013
DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS
Check for Samples: SN74AHC139, SN54AHC139
FEATURES
1
• Operating Range 2-V to 5.5-V
• Designed Specifically for High-Speed Memory
Decoders and Data-Transmission Systems
• Incorporate Two Enable Inputs to Simplify
Cascading and/or Data Reception
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
SN54AHC139 . . . J or W PACKAGE
SN74AHC139 . . . D,DB,DGV,N,NS
OR PW PACKAGE
(TOP VIEW)
SN74AHC139 . . . RGY PACKAGE
(TOP VIEW)
SN54AHC139 . . . FKP ACKAGE
(TOP VIEW)
1G 1
1A 2
1B 3
1Y0 4
1Y1 5
1Y2 ⁶
1Y3 ⁷
GND ⁸
16 V_CC
15 2G
14 2A
13 2B
12 2Y0
11 _2Y1
10 _2Y2
9 _2Y3
1
1A 2
1B 3
1Y0 4
1Y1 5
1Y2 6
1Y3 7
8
16
15 2G
14 2A
13 2B
12 2Y0
11 2Y1
10 2Y2
9
3 2 1 20 19
1B 4
18 2A
1Y0 5
17 2B
NC 6
16 NC
1Y1 7
15 2Y0
1Y2 ⁸
14 _2Y1
9 10 11 12 13
NC − No internal connection
DESCRIPTION
The ’AHC139 devices are dual 2-line to 4-line decoders/demultiplexers designed for 2-V to 5.5-V V_CC operation.
These 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 used 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.
FUNCTION TABLE
(EACH GATE)
INPUTS
OUTPUT
SELECT
G
Y0 Y1 Y2 Y3
BA
HXXHHHH
L L L LHHH
L LHHLHH
LH LHH LH
L HHHHH L
1
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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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1995–2013, Texas Instruments Incorporated