AT27C256R Series

256Kb (32-Kbit x 8) 5V OTP EPROM

Catalog

256Kb (32-Kbit x 8) 5V OTP EPROM

Part	Memory Type	Memory Size	Technology	Operating Temperature [Min]	Operating Temperature [Max]	Access Time	Memory Interface	Voltage - Supply [Min]	Voltage - Supply [Max]	Memory Format	Memory Organization	Package / Case	Package / Case	Package / Case	Mounting Type	Supplier Device Package	Supplier Device Package [y]	Supplier Device Package [x]	Package / Case [y]	Package / Case [x]	Package / Case [custom]	Package / Case [custom]
Microchip Technology AT27C256R-55PI	Non-Volatile	32 KB	EPROM - OTP	-40 °C	85 °C	55 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-DIP	0.6 in	15.24 mm	Through Hole	28-PDIP
Microchip Technology AT27C256R-70JI	Non-Volatile	32 KB	EPROM - OTP	-40 °C	85 °C	70 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	32-LCC (J-Lead)			Surface Mount	32-PLCC	11.43	13.97
Microchip Technology AT27C256R-45TC	Non-Volatile	32 KB	EPROM - OTP			45 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-TSSOP			Surface Mount	28-TSOP			11.8 mm	0.465 "
Microchip Technology AT27C256R-90PC	Non-Volatile	32 KB	EPROM - OTP			90 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-DIP	0.6 in	15.24 mm	Through Hole	28-PDIP
Microchip Technology AT27C256R-12RI	Non-Volatile	32 KB	EPROM - OTP	-40 °C	85 °C	120 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-SOIC			Surface Mount	28-SOIC					8.69 mm	0.342 in
Microchip Technology AT27C256R-90TI	Non-Volatile	32 KB	EPROM - OTP	-40 °C	85 °C	90 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-TSSOP			Surface Mount	28-TSOP			11.8 mm	0.465 "
Microchip Technology AT27C256R-15RC	Non-Volatile	32 KB	EPROM - OTP			150 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-SOIC			Surface Mount	28-SOIC					8.69 mm	0.342 in
Microchip Technology AT27C256R-15TI	Non-Volatile	32 KB	EPROM - OTP	-40 °C	85 °C	150 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-TSSOP			Surface Mount	28-TSOP			11.8 mm	0.465 "
Microchip Technology AT27C256R-12JC	Non-Volatile	32 KB	EPROM - OTP			120 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	32-LCC (J-Lead)			Surface Mount	32-PLCC	11.43	13.97
Microchip Technology AT27C256R-15PA	Non-Volatile	32 KB	EPROM - OTP	-40 °C	125 °C	150 ns	Parallel	4.5 V	5.5 V	EPROM	32K x 8	28-DIP	0.6 in	15.24 mm	Through Hole	28-PDIP

Catalog

256Kb (32-Kbit x 8) 5V OTP EPROM

Key Features

• + 256-Kbit (32-Kbit x 8)

• + Low-power CMOS operation

• + Standard power supply range, 5V +/-10%

• + 100 µA max standby

• + 20mA max active at 5 MHz

• + Parallel Interface

• + 45 ns access time

• + High-reliability CMOS technology

• + 2,000V ESD protection

• + 200 mA latchup immunity

• + Rapid programming algorithm – 100 µs/byte (typical)

• + CMOS and TTL compatible inputs and outputs

• + Integrated product identification code

• + Industrial Temperature Range: -40°C to 85°C

• + Available in Green (Pb/Halide-free) Packaging Only

• + 32-lead, Plastic J-leaded Chip Carrier (PLCC)

Description

The Microchip AT27C256R is a low-power, high-performance 256-Kbit One Time Programmable EPROM organized as 32-Kbit x 8. Requiring a single 5V power supply, in normal read mode operation typical power consumption is only 8 mA in active mode and less than 10 μA in standby mode. Any byte can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states on high-performance microprocessor systems.