AT27C256R-12PI Atmel, AT27C256R-12PI Datasheet - Page 9

• Manufacturer Part Number: AT27C256R-12PI
• Description: IC OTP 256KBIT 120NS 28DIP
• Manufacturer: Atmel

Specifications of AT27C256R-12PI

• Format - Memory: EPROMs
• Memory Type: OTP EPROM
• Memory Size: 256K (32K x 8)
• Speed: 120ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.600", 15.24mm)
• 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 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT27C256R12PI

18. Rapid Programming Algorithm
0014M–EPROM–12/07
A 100 µs CE pulse width is used to program. The address is set to the first location. V
raised to 6.5V and V
CE pulse without verification. Then a verification/reprogramming loop is executed for each
address. In the event a byte fails to pass verification, up to 10 successive 100 µs pulses are
applied with a verification after each 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
are read again and compared with the original data to determine if the device passes or fails.
PP
is raised to 13.0V. Each address is first programmed with one 100 µs
PP
is then lowered to 5.0V and V
AT27C256R
CC
to 5.0V. All bytes
CC
is
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