CRT7004 Datasheet | SMSC

CRT 7004 JLPC FAMILY Dot Matrix Character Generator 128 Characters of 7 x 11 Bits Features o On chip character generator (mask programmable) 128 Characters 7 x 11 Dot matrix block o On chip video shift register Maximum shift register frequency CRT 7004A 20MHz CRT 70048 15MHz CRT 7004C 10MHz Access time 400ns o No descender circuitry required o On chip cursor o On chip character address buffer o On chip line address buffer o Single +5 volt power supply o TTL patible o Ma S N-channel silicon-gate COPLAMOS® process o CLASp® technology- ROM o patible with CRT 5027 VTAC® o Enhanced version of CG5004L-1 PIN CONFIGURATION NC 1 SO 2 Vee 3 LS 4 PRST 5 L1 6 CLR 7 L2 8 L4 9 L8 10 A1 11 A2 12 24 GND 23 PE 22 NC 21 VDC 20 CUR 19 AS 18 LCI 17 A7 16 A6 15 A5 14 A4 13 A3 PACKAGE: 24-Pin D.I.P. GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SMC's CRT 7004 is a high speed character generator with a high speed video shift register designed to display 128 characters in a 7 x 11 dot matrix. The CRT 7004 is an enhanced, pin for pin patible, version of SMC's CG5004L-1. It is fabricated using SMC's patented COPLAMOS® and CLASp® technologies and employs depletion mode loads, allowing operation from a single + 5v supply. This process permits reduction of turn-around time for ROM patterns. The CRT 7004 is a panion chip to SMC's CRT 5027 VTAC®. Together these two chips prise the circuitry required for the display portion of a CRT video terminal. Line Address Character Address Lower Case Inhibit Cursor Parallel, _ _ _ _ _ _..... Enable _ _ _ _ _----<r..L..--~;:;.~=;_--1 Clock Preset----------------J Clear----------------.J Senal Output MAXIMUM GUARANTEED RATINGS- Operating Temperature Range ...............................................................O°C to + 70°C Storage Temperature Range ..............................................................- 55°C to + 150°C Lead Temperature (soldering, 10 sec.) .........................................................