MCM6728B

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MCM6728B/D 256K x 4 Bit Fast Static Random Access Memory The MCM6728B is a 1,048,576 bit static random access memory organized as 262,144 words of 4 bits. This device is fabricated using high performance silicon–gate BiCMOS technology. Static design eliminates the need for external clocks or timing strobes. This device meets JEDEC standards for functionality and revolutionary pinout, and is available in a 400 mil plastic small–outline J–leaded package. Single 5 V ± 10% Power Supply Fully Static — No Clock or Timing Strobes Necessary All Inputs and Outputs Are TTL Compatible Three State Outputs Fast Access Times: 8, 10, 12 ns Center Power and I/O Pins for Reduced Noise MCM6728B WJ PACKAGE 400 MIL SOJ CASE 810–03 PIN ASSIGNMENT A A A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 A A A A A DQ3 VSS VCC DQ2 A A A A A BLOCK DIAGRAM A A A A A A A A A DQ0 INPUT DATA CONTROL DQ3 A A COLUMN I/O COLUMN DECODER ROW DECODER MEMORY MATRIX 512 ROWS x 512 x 4 COLUMNS VCC VSS A E DQ0 VCC VSS DQ1 W A A A A PIN NAMES A0 – A17 . . . . . . . . . . . . . Address Input E . . . . . . . . . . . . . . . . . . . . . . Chip Enable W . . . . . . . . . . . . . . . . . . . . Write Enable DQ0 – DQ3 . . . . . . . . Data Input/Output VCC . . . . . . . . . . . . + 5 V Power Supply VSS . . . . . . . . . . . . . . . . . . . . . . . Ground NC . . . . . . . . . . . . . . . . . No Connection A A A A A...