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Details, datasheet, quote on part number:SN74HC251PWR
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Datasheet text preview:
SCLS132E - DECEMBER 1982 - REVISED SEPTEMBER 2003
SN54HC251, SN74HC251 DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
D 3-State Version of 'HC151 D Wide Operating Voltage Range of 2 V to 6 V D High-Current 3-State Outputs Interface D D D D D D
Directly With System Bus or Can Drive Up To 15 LSTTL Loads Low Power Consumption, 80-µA Max ICC Typical tpd = 9 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max Perform Parallel-to-Serial Conversion Complementary Outputs Provide True and Inverted Data
SN54HC251 . . . J OR W PACKAGE SN74HC251 . . . D, DB, N, NS, OR PW PACKAGE (TOP VIEW)
D3 D2 D1 D0 Y W OE GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC D4 D5 D6 D7 A B C
These data selectors/multiplexers contain full binary decoding to select 1-of-8 data sources and feature strobe-controlled complementary 3-state outputs. The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (in the high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Both outputs are controlled by the output-enable (OE) input. The outputs are disabled when OE is high. ORDERING INFORMATION
TA PDIP - N PACKAGE Tube of 25 Tube of 40 SOIC - D -40°C to 85 C 85°C SOP - NS SSOP - DB Reel of 2500 Reel of 250 Reel of 2000 Reel of 2000 Tube of 90 TSSOP - PW CDIP - J -55°C to 125 C 125°C CFP - W Reel of 2000 Reel of 250 Tube of 25 Tube of 150
D1 D0 NC Y W
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
D2 D3 NC VCC D4 D5 D6 NC D7 A
NC - No internal connection ORDERABLE PART NUMBER SN74HC251N SN74HC251D SN74HC251DR SN74HC251DT SN74HC251NSR SN74HC251DBR SN74HC251PW SN74HC251PWR SN74HC251PWT SNJ54HC251J SNJ54HC251W SNJ54HC251J SNJ54HC251W HC251 HC251 HC251 HC251
On products compliant to MIL PRF 38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
description/ordering information
SN54HC251 . . . FK PACKAGE (TOP VIEW)
LCCC - FK Tube of 55 SNJ54HC251FK SNJ54HC251FK 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.
Copyright 2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
OE GND NC C B
TOP-SIDE MARKING SN74HC251N
1
SCLS132E - DECEMBER 1982 - REVISED SEPTEMBER 2003
SN54HC251, SN74HC251 DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
FUNCTION TABLE INPUTS SELECT C X L L L L H H H H B X L L H H L L H H A X L H L H L H L H OE H L L L L L L L L Y Z D0 D1 D2 D3 D4 D5 D6 D7 W Z D0 D1 D2 D3 D4 D5 D6 D7 OUTPUTS
D0, D1 . . . D7 = the level of the respective D input
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SCLS132E - DECEMBER 1982 - REVISED SEPTEMBER 2003
SN54HC251, SN74HC251 DATA SELECTORS/MULTIPLEXERS WITH 3 STATE OUTPUTS
logic diagram (positive logic)
OE 7 11
A B C
10 9
D0 D1
4
TG
3
TG
D2
2
TG
5 D3 1
TG
Y
D4
15
TG
6 D5 14 13
TG TG
W
D6
D7
12
TG
Pin numbers shown are for the D, DB, J, N, NS, PW, and W packages.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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