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74F656AD
74F656A Octal buffer/driver with parity; non-inverting; 3-state Rev. 6 — 14 December 2011 Product data sheet 1. General description The 74F656A is an octal buffer and line driver with parity generation/checking. The 74F656A can be used as memory address driver, clock driver and bus-oriented transmitter/receiver. The inclusion of parity generation/checking improves PCB density. 2. Features and benefits Combines 74F244 and 74F280A functions in one device High impedance NPN base inputs for reduced input current (40 A in HIGH and LOW states) IIL = 20 A compared to 600 A in FAST family specification For applications with high output drive and light bus loading Non-inverting 3-state output sink capability IOL = 64 mA and source IOH = 15 mA Inputs and outputs on separate sides simplifies board layout Combined functions reduce part count and enhance system performance Industrial temperature range available (40 C to +85 C) 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version N74F656AD 0 C to 70 C SO24 SOT137-1 I74F656AD 40 C to +85 C plastic small outline package; 24 leads; body width 7.5 mm 74F656A NXP Semiconductors Octal buffer/driver with parity; non-inverting; 3-state PI 3 21 22 D0 D1 D2 D3 D4 D5 D6 D7 OE0 OE1 OE2 Fig 3. ΣE ΣO 4 20 5 19 6 18 7 17 8 16 9 15 10 14 11 13 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 1 2 23 001aal253 Logic diagram 74F656A Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 6 — 14 December 2011 © NXP B.V. 2011. All rights reserved. 3 of 14
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