AT27C256R12PA Atmel, AT27C256R12PA Datasheet - Page 8

• Manufacturer Part Number: AT27C256R12PA
• Manufacturer: Atmel

Specifications of AT27C256R12PA

• Organization: 32Kx8
• Interface Type: Parallel
• In System Programmable: External
• Access Time (max): 120ns
• Package Type: PDIP
• Reprogramming Technique: OTP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 20mA
• Pin Count: 28
• Mounting: Through Hole
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Not Compliant

Rapid Programming Algorithm
A 100 s CE pulse width is used to program. The address
is set to the first location. V
raised to 13.0V. Each address is first programmed with one
100 s CE pulse without verification. Then a verifica-
tion/reprogramming loop is executed for each address. In
the event a byte fails to pass verification, up to 10 succes-
sive 100 s pulses are applied with a verification after each
8
AT27C256R
CC
is raised to 6.5V and V
PP
is
pulse. If the byte fails to verify after 10 pulses have been
applied, the part is considered failed. After the byte verifies
properly, the next address is selected until all have been
checked. V
bytes are read again and compared with the original data to
determine if the device passes or fails.
PP
is then lowered to 5.0V and V
CC
to 5.0V. All