AT28C256E Series

5V 256Kbit (32Kbit x 8) Parallel EEPROM with Software Data Protection

Catalog

5V 256Kbit (32Kbit x 8) Parallel EEPROM with Software Data Protection

Part	Memory Size	Mounting Type	Supplier Device Package	Write Cycle Time - Word, Page	Memory Format	Technology	Operating Temperature [Min]	Operating Temperature [Max]	Memory Interface	Memory Organization	Voltage - Supply [Min]	Voltage - Supply [Max]	Memory Type	Package / Case	Package / Case	Package / Case	Access Time	Supplier Device Package [y]	Supplier Device Package [x]	Package / Case [y]	Package / Case [x]	Package / Case
Microchip Technology AT28C256-20DM/883-815	32 KB	Through Hole	28-CERDIP	10 ms	EEPROM	EEPROM	-55 °C	125 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile	15.24 mm	0.6 in	28-CDIP	200 ns
Microchip Technology AT28C256-25LM/883-829	32 KB	Surface Mount	32-LCC (11.43x13.97)	10 ms	EEPROM	EEPROM	-55 °C	125 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			32-CLCC	250 ns
Microchip Technology AT28C256E-15UM/883-815	32 KB	Through Hole	28-CPGA	10 ms	EEPROM	EEPROM	-55 °C	125 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			28-BCPGA	150 ns	16.51	13.97
Microchip Technology AT28C256-15TU-T	32 KB	Surface Mount	28-TSOP	10 ms	EEPROM	EEPROM	-40 °C	85 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			28-TSSOP	150 ns			11.8 mm	0.465 "
Microchip Technology AT28C256E-20UM/883	32 KB	Through Hole	28-CPGA	10 ms	EEPROM	EEPROM	-55 °C	125 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			28-BCPGA	200 ns	16.51	13.97
Microchip Technology AT28C256-20LM/883	32 KB	Surface Mount	32-LCC (11.43x13.97)	10 ms	EEPROM	EEPROM	-55 °C	125 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			32-CLCC	200 ns
Microchip Technology AT28C256-20UM/883-815	32 KB	Through Hole	28-CPGA	10 ms	EEPROM	EEPROM	-55 °C	125 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			28-BCPGA	200 ns	16.51	13.97
Microchip Technology AT28C256E-15SU-T	32 KB	Surface Mount	28-SOIC	10 ms	EEPROM	EEPROM	-40 °C	85 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile			28-SOIC	150 ns			7.5 mm	0.295 in
Microchip Technology AT28C256E-15PC	32 KB	Through Hole	28-PDIP	10 ms	EEPROM	EEPROM			Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile		15.24 mm	28-DIP	150 ns					0.6 in
Microchip Technology AT28C256-15PU	32 KB	Through Hole	28-PDIP	10 ms	EEPROM	EEPROM	-40 °C	85 °C	Parallel	32K x 8	4.5 V	5.5 V	Non-Volatile		15.24 mm	28-DIP	150 ns					0.6 in

Catalog

5V 256Kbit (32Kbit x 8) Parallel EEPROM with Software Data Protection

Key Features

• * 32 Kbits x 8 (256 Kbit)

• * 5V ± 10% Supply

• * Parallel Interface

• * AT28C256E - High Endurance 100K Write Cycles Option

• * AT28C256F - 3 ms Fast Write Option

• * 150ns access time

• * Self-Timed Erase and Write Cycles (10 ms max)

• * Page Write and Byte Write

• * Data Polling for end of write detection

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

• * Low Power Consumption

• * Read / Write current 40 mA (Max)

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

• * Standby current TTL 2 mA (Max), CMOS 200 µA (Max)

• * Write-Protection

• * Hardware Protection

• * Software Data Protect

• * Data retention > 10 years

• * Temperature Ranges

• * Standard Temperature Range: -40°C to 85°C

• * Military Temperature Range: -55°C to 125°C

• * 28-lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)

• * 28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC)

• * 28-lead, Plastic Thin Small Outline Package (TSOP)

• * Available in SMD Dual marked (5962-88525xxxx) CERAMIC Hermetic Packaging

• * 28-Lead, 0.600" Wide, Non-Windowed, Ceramic Dual Inline (Cerdip)

• * 28-Lead, Non-Windowed, Ceramic Bottom-Brazed Flat Package (Flatpack)

• * 32-Pad, Non-windowed, Ceramic, Leadless Chip Carrier (LCC)

Description

The Microchip AT28C256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 150ns with power dissipation of 440mW. Deselected, CMOS standby current is less than 200μA. Accessed like static RAM for the read or write cycle without external components, it contains a 64-byte page register to allow writing of up to 64bytes simultaneously. Features an internal Error Correction Circuit for extended endurance and improved data retention, in Military version. Optional Software Data Protection mechanism guards against inadvertent writes; and an extra 64 bytes of EEPROM enables device identification or tracking. The AT28C256 is also available DUAL MARKED where applicable with the appropriate Standard Military Drawing Number - 5962-88525xxxx. See the datasheet for exact MIL product availability.