Preliminary W27C020
256K × 8 ELECTRICALLY ERASABLE EPROM
GENERAL DESCRIPTION
The W27C020 is a high speed, low power El...
Preliminary W27C020
256K × 8 ELECTRICALLY ERASABLE EPROM
GENERAL DESCRIPTION
The W27C020 is a high speed, low power Electrically Erasable and Programmable Read Only Memory organized as 262144 × 8 bits that operates on a single 5 volt power supply. The W27C020 provides an electrical chip erase function.
FEATURES
High speed access time: 70/90/120 nS (max.)
Read operating current: 30 mA (max.) Erase/Programming operating current:
30 mA (max.) Standby current: 1 mA (max.) Single 5V power supply
+14V erase/+12V programming
voltage Fully static operation All inputs and outputs directly TTL/
CMOS
compatible
Three-state outputs
Available packages: 32-pin 600 mil DIP and PLCC
PIN CONFIGURATIONS
BLOCK DIAGRAM
Vpp A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 GND
1 32 2 31 3 30 4 29 5 28 6 27 7 32-pin DIP 26 8 25 9 24 10 23 11 22 12 21 13 20 14 19 15 18 16 17
Vcc
PGM A17 A14 A13 A8 A9 A11
OE A10 CE Q7 Q6 Q5 Q4 Q3
/ AAA V V P A 1 11 p c G1 2 5 6 p ...
