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SN74LVC257AD 数据表(PDF) 4 Page - Texas Instruments |
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SN74LVC257AD 数据表(HTML) 4 Page - Texas Instruments |
4 / 30 page 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 4A 4B NC 4Y 3A 1B 1Y NC 2A 2B 1 16 8 9 2 3 4 5 6 7 15 14 13 12 11 10 OE 4A 4B 4Y 3A 3B 1A 1B 1Y 2A 2B 2Y 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 A/B 1A 1B 1Y 2A 2B 2Y GND VCC OE 4A 4B 4Y 3A 3B 3Y SN54LVC257A, SN74LVC257A SCAS294O – JANUARY 1993 – REVISED JUNE 2015 www.ti.com 6 Pin Configuration and Functions D, DB, NS, J, W, or PW Package RGY Package 16-Pin SOIC, SSOP, SO, CDIP, CFP, or TSSOP 16-Pin VQFN with Exposed Thermal Pad Top View Top View FK Package 20-Pin LCCC Top View Pin Functions PIN SOIC, SSOP, SO, I/O DESCRIPTION NAME CDIP, CFP, LCCC TSSOP, or VQFN A/B 1 2 I Select Pin, Low selects A, High selects B 1A 2 3 I/O Multiplexer Signal Input 1B 3 4 I/O Multiplexer Signal Input 1Y 4 5 I/O Multiplexer Output 2A 5 7 I/O Multiplexer Signal Input 2B 6 8 I/O Multiplexer Signal Input 2Y 7 9 I/O Multiplexer Output 3A 11 14 I/O Multiplexer Signal Input 3B 10 13 I/O Multiplexer Signal Input 3Y 9 12 I/O Multiplexer Output 4A 14 18 I/O Multiplexer Signal Input 4B 13 17 I/O Multiplexer Signal Input 4Y 12 15 I/O Multiplexer Output GND 8 10 — Ground NC(1) — 1, 6, 11, 16 — No connect OE 15 19 I/O Active low Output enable VCC 16 20 — Power pin (1) NC – no internal connection 4 Submit Documentation Feedback Copyright © 1993–2015, Texas Instruments Incorporated Product Folder Links: SN54LVC257A SN74LVC257A |
类似零件编号 - SN74LVC257AD |
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类似说明 - SN74LVC257AD |
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