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MC74LCX2952 Datasheet(PDF) 1 Page - Motorola, Inc |
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MC74LCX2952 Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 10 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 1 REV 1 © Motorola, Inc. 1997 3/97 Low-Voltage CMOS Octal Registered Transceiver With Dual Output and Clock Enables With 5V-Tolerant Inputs and Outputs (3-State, Non-Inverting) The MC74LCX2952 is a high performance, non–inverting octal registered transceiver operating from a 2.7 to 3.6V supply. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A VI specification of 5.5V allows MC74LCX2952 inputs to be safely driven from 5V devices. The MC74LCX2952 is suitable for memory address driving and all TTL level bus oriented transceiver applications. Two 8–bit back to back registers store data from either of two bidirectional buses. Data applied to the inputs is entered and stored on the rising edge of the Clock (CAB, CBA) provided that the Clock Enable (CEAB, CEBA) is Low. The data is then presented at the 3–state output buffers, but is only accessible when the Output Enable (OEAB, OEBA) is Low. The operation of the MC74LCX2952 is symmetrical — A inputs to B outputs occurs in the same manner as B inputs to A outputs. • Designed for 2.7 to 3.6V VCC Operation • 5V Tolerant — Interface Capability With 5V TTL Logic • Supports Live Insertion and Withdrawal • IOFF Specification Guarantees High Impedance When VCC = 0V • LVTTL Compatible • LVCMOS Compatible • 24mA Balanced Output Sink and Source Capability • Near Zero Static Supply Current in All Three Logic States (10µA) Substantially Reduces System Power Requirements • Latchup Performance Exceeds 500mA • ESD Performance: Human Body Model >2000V; Machine Model >200V Figure 1. 24–Lead Pinout (Top View) 23 24 22 21 20 19 18 2 1 3456 7 VCC 17 8 16 9 15 10 A7 A6 A5 A4 A3 A2 A1 A0 OEBA B7 B6 B5 B4 B3 B2 B1 B0 OEAB CAB 14 11 13 12 CBA CEBA CEAB GND DW SUFFIX 24–LEAD PLASTIC SOIC WIDE PACKAGE CASE 751E–04 DT SUFFIX 24–LEAD PLASTIC TSSOP PACKAGE CASE 948H–01 SD SUFFIX 24–LEAD PLASTIC SSOP PACKAGE CASE 940D–03 MC74LCX2952 LOW–VOLTAGE CMOS OCTAL REGISTERED TRANSCEIVER PIN NAMES Function Side A Inputs/Outputs Side B Inputs/Outputs Clock Pulse Inputs Clock Enable Inputs Output Enable Inputs Pins A0–A7 B0–B7 CAB, CBA CEAB, CEBA OEAB, OEBA |
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