AT28HC256F Series

5V High-Speed 256Kbit (32Kbit x 8) Parallel EEPROM

Catalog

5V High-Speed 256Kbit (32Kbit x 8) Parallel EEPROM

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Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Access Time	Write Cycle Time - Word, Page	Memory Size	Mounting Type	Memory Interface	Memory Type	Memory Format	Technology	Supplier Device Package	Supplier Device Package [y]	Supplier Device Package [x]	Package / Case	Memory Organization	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case [y]	Package / Case [x]	Package / Case	Package / Case	Package / Case
Microchip Technology AT28HC256-12JI	4.5 V	5.5 V	120 ns	10 ms	32 KB	Surface Mount	Parallel	Non-Volatile	EEPROM	EEPROM	32-PLCC	11.43	13.97	32-LCC (J-Lead)	32K x 8	-40 °C	85 °C
Microchip Technology AT28HC256E-12TU-T	4.5 V	5.5 V	120 ns	10 ms	32 KB	Surface Mount	Parallel	Non-Volatile	EEPROM	EEPROM	28-TSOP			28-TSSOP	32K x 8	-40 °C	85 °C	11.8 mm	0.465 "
Microchip Technology AT28HC256E-90TU	4.5 V	5.5 V	90 ns	10 ms	32 KB	Surface Mount	Parallel	Non-Volatile	EEPROM	EEPROM	28-TSOP			28-TSSOP	32K x 8	-40 °C	85 °C	11.8 mm	0.465 "
Microchip Technology AT28HC256F-12UM/883	4.5 V	5.5 V	120 ns	3 ms	32 KB	Through Hole	Parallel	Non-Volatile	EEPROM	EEPROM	28-CPGA	16.51	13.97	28-BCPGA	32K x 8	-55 °C	125 °C
Microchip Technology AT28HC256E-12DM/883	4.5 V	5.5 V	120 ns	10 ms	32 KB	Through Hole	Parallel	Non-Volatile	EEPROM	EEPROM	28-CERDIP			28-CDIP	32K x 8	-55 °C	125 °C			15.24 mm	0.6 in
Microchip Technology AT28HC256E-70PI	4.5 V	5.5 V	70 ns	10 ms	32 KB	Through Hole	Parallel	Non-Volatile	EEPROM	EEPROM	28-PDIP			28-DIP	32K x 8	-40 °C	85 °C				15.24 mm	0.6 in
Microchip Technology AT28HC256F-90TU-T	4.5 V	5.5 V	90 ns	3 ms	32 KB	Surface Mount	Parallel	Non-Volatile	EEPROM	EEPROM	28-TSOP			28-TSSOP	32K x 8	-40 °C	85 °C	11.8 mm	0.465 "
Microchip Technology AT28HC256-90PU	4.5 V	5.5 V	90 ns	10 ms	32 KB	Through Hole	Parallel	Non-Volatile	EEPROM	EEPROM	28-PDIP			28-DIP	32K x 8	-40 °C	85 °C				15.24 mm	0.6 in
Microchip Technology AT28HC256F-12FM/883	4.5 V	5.5 V	120 ns	3 ms	32 KB	Surface Mount	Parallel	Non-Volatile	EEPROM	EEPROM	28-FlatPack Ceramic Bottom-Brazed			28-CFlatPack	32K x 8	-55 °C	125 °C
Microchip Technology AT28HC256-70JC	4.5 V	5.5 V	70 ns	10 ms	32 KB	Surface Mount	Parallel	Non-Volatile	EEPROM	EEPROM	32-PLCC	11.43	13.97	32-LCC (J-Lead)	32K x 8

Catalog

5V High-Speed 256Kbit (32Kbit x 8) Parallel EEPROM

Key Features

• * 32 Kbits x 8 (256 Kbit)

• * 5V ± 10% Supply

• * Parallel Interface

• * AT28HC256E - High Endurance 100K Write Cycles Option

• * AT28HC256F - 3 ms Fast Write Option

• * 70ns access time

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

• * Page Write and Byte Write

• * Data Polling for end of write detection

• * Low Power Consumption

• * Read / Write current 80 mA (Max)

• * Standby current TTL 3 mA (Max), CMOS 300 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

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

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

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

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

• * Available in Dual marked (5962-886340xxx) 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 AT28HC256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 70ns with power dissipation of 440mW. Deselected, CMOS standby current is less than 5mA. 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 64 bytes 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 AT28HC256 is also available DUAL MARKED where applicable with the appropriate Standard Military Drawing Number - 5962-886340xxx. See the datasheet for exact MIL product availability.