A278308A General Description
The A278308A chip is a high-performance 2,097,152 bit one-time programmable read only memory (OTP EPROM) organized as 256K by 8 bits. The A278308A requires only 5V power supply in normal read mode operation and any input signals are TTL levels. The A278308A is available in industry standard 32 pin dual-in-line and 32 pin PLCC packages.
A278308A Maximum Ratings
Ambient Operating Temperature (TA) . . . -10°C to +85°C
Storage Temperature Plastic Package (TSTG) . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to 125°C
Applied Input Voltage (VI):
All Pins Except A9, VPP and VCC . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.6V to VCC + 0.6V
A9, VPP . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 13.5V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 7.0V
Output Voltage (VO) . . . . . . . . . . . . -0.6V to 7.0V (Note 1)
A278308A Features
262,144 X 8 bit organization
Programming voltage: 12.75V
Access time: 55/70 ns (max.)
Current: Operating: 30mA (max.) at 5MHz
Standby: 100µA (max.)
All inputs and outputs are directly TTL-compatible
Available in 32-pin DIP and 32-pin PLCC packages
A278308A Connection Diagram
Map list: ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789All