AT28HC64B ATMEL Corporation, AT28HC64B Datasheet - Page 2

• Manufacturer Part Number: AT28HC64B
• Description: 64K 8K x 8 High Speed CMOS E2PROM with Page Write and Software Data Protection
• Manufacturer: ATMEL Corporation

Description (Continued)
Absolute Maximum Ratings*
writing of up to 64-bytes simultaneously. During a write cy-
cle, the addresses and 1 to 64-bytes of data are internally
latched, freeing the address and data bus for other opera-
tions. Following the initiation of a write cycle, the device
will automatically write the latched data using an internal
control timer. The end of a write cycle can be detected by
DATA Polling of I/O7. Once the end of a write cycle has
been detected, a new access for a read or write can begin.
Block Diagram
2-268
Temperature Under Bias................. -55°C to +125°C
Storage Temperature...................... -65°C to +150°C
All Input Voltages
(including NC Pins)
with Respect to Ground ................... -0.6V to +6.25V
All Output Voltages
with Respect to Ground .............-0.6V to V
Voltage on OE and A9
with Respect to Ground ................... -0.6V to +13.5V
AT28HC64B
CC
+ 0.6V
Atmel’s AT28HC64B has additional features to ensure
high quality and manufacturability. The device utilizes in-
ternal error correction for extended endurance and im-
proved data retention. An optional software data protec-
tion mechanism is available to guard against inadvertent
writes. The device also includes an extra 64-bytes of
EEPROM for device identification or tracking.
*NOTICE: Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the
device at these or any other conditions beyond those indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.