器件名称:
MC74F568DW
功能描述:
4-BIT BIDIRECTIONAL COUNTERS(WITH 3-STATE OUTPUTS)
文件大小:
183.72KB 共6页
简 介:
4-BIT BIDIRECTIONAL COUNTERS (WITH 3-STATE OUTPUTS) The MC54/ 74F568 and MC54/74F569 are fully synchronous, reversible counters with 3-state outputs. The F568 is a BCD decade counter; the F569 is a binary counter. They feature preset capability for programmable operation, carry lookahead for easy cascading, and a U/D input to control the direction of counting. For maximum flexibility there are both synchronous and master asynchronous reset inputs as well as both Clocked Carry (CC) and Terminal Count (TC) outputs. All state changes except Master Reset are initiated by the rising edge of the clock. A HIGH signal on the Output Enable (OE) input forces the output buffers into the high impedance state but does not prevent counting, resetting or parallel loading. MC54/74F568 MC54/74F569 4-BIT BIDIRECTIONAL COUNTERS (WITH 3-STATE OUTPUTS) FAST SCHOTTKY TTL 4-Bit Bidirectional Counting F568 Decade Counter F569 Binary Counter Synchronous Counting and Loading Lookahead Carry Capability for Easy Cascading Preset Capability for Programmable Operation 3-State Outputs for Bus Organized Systems Master Reset (MR) Overrides All Other Inputs Synchronous Reset (SR) Overrides Counting and Parallel Loading 20 1 J SUFFIX CERAMIC CASE 732-03 20 1 N SUFFIX PLASTIC CASE 738-03 CONNECTION DIAGRAM VCC TC 20 19 CC 18 OE 17 O0 16 O1 15 O2 14 O3 CET 13 12 PE 11 20 1 DW SUFFIX SOIC CASE 751D-03 ORDERING INFORMATION MC54FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC 1 U/D 2 CP 3 P0 4 P1 5 ……
