只读存储器 READ-ONLY MEMORIES
description
The TMS27C020 series are 262144 by 8-bit 2097152-bit, ultraviolet UV light erasable, electrically programmable read-only memories EPROMs.
The TMS27PC020 series are one-time program mable OTP electrically programmable read-only memories PROMs.
Organization...262144 by 8 Bits
Single 5-V Power Supply
Operationally Compatible With Existing Megabit EPROMs
Industry Standard 32-Pin Dual-In-line Package and 32-Lead Plastic Leaded Chip Carrier
All Inputs/Outputs Fully TTL Compatible
±10% VCC Tolerance
Max Access/Min Cycle Time VCC ± 10%
’27C/PC020-10 100 ns
’27C/PC020-12 120 ns
’27C/PC020-15 150 ns
’27C/PC020-20 200 ns
’27C/PC020-25 250 ns
8-Bit Output For Use in Microprocessor-Based Systems
Very High-Speed SNAP! Pulse Programming
Power Saving CMOS Technology
3-State Output Buffers
400 mV Minimum DC Noise Immunity With Standard TTL Loads
Latchup Immunity of 250 mA on All Input and Output Pins
No Pullup Resistors Required
Low Power Dissipation VCC= 5.5 V
– Active...165 mW Worst Case
– Standby...0.55 mW Worst Case CMOS-Input Levels
Temperature Range Options