54F257A Datasheet | National Semiconductor

Description The ’F257A is a quad 2-input multiplexer with TRI-STATE outputs Four bits of data from two sources can be selected using a mon Data Select input The four outputs present the selected data in true (non-inverted) form The outputs may be switched to a high impedance state with a HIGH on the mon Output Enable (OE) input allowing the outputs to interface directly with bus-oriented systems Features Y Multiplexer expansion by tying outputs together Y Non-inverting TRI-STATE outputs Y Input clamp diodes limit high-speed termination effects Y Guaranteed 4000V minimum ESD protection mercial 74F257APC 74F257ASC (Note 1) 74F257ASJ (Note 1) Military 54F257ADM (Note 2) 54F257AFM (Note 2) 54F257ALL (Note 2) Package Number N16E J16A M16A M16D W16A E20A Package Description 16-Lead (0 300 Wide) Molded Dual-In-Line 16-Lead Ceramic Dual-In-Line 16-Lead (0 150 Wide) Molded Small Outline JEDEC 16-Lead (0 300 Wide) Molded Small Outline EIAJ 16-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB Logic Symbols Connection Diagrams Pin Assignment for DIP SOIC and Flatpak Pin Assignment for LCC IEEE IEC TL F 9507- 3 TL F 9507 - 1 TL F 9507 - 2 TL F 9507- 5 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9507 RRD-B30M75 Printed in U S A Unit Loading Fan Out Pin Names S OE I0a - I0d I1a - I1d Za - Zd Description mon Data Select Input TRI-STATE Output Enable Input (Active LOW) Data Inputs from Source 0 Data Inputs from Source 1 TRI-STATE Multiplexer Outputs 54F 74F UL HIGH LOW 10 10 10 10 10 10 10 10 150 40 (33 3) Input IIH IIL Output IOH IOL 20 m A b0 6 m A 20 m A b0 6 m A 20 m A b0 6 m A 20 m A b0 6 m A b3 m A 24 m A (20 m A) Functional Description The ’F257A is a quad 2-input multiplexer with TRI-STATE outputs It selects four...