AT27BV020-90VU Atmel, AT27BV020-90VU Datasheet - Page 10

• Manufacturer Part Number: AT27BV020-90VU
• Manufacturer: Atmel

Specifications of AT27BV020-90VU

• Organization: 256Kx8
• Interface Type: Parallel
• In System Programmable: External
• Access Time (max): 90ns
• Package Type: VSOP
• Reprogramming Technique: OTP
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (min): 2.7/4.5V
• Operating Supply Voltage (max): 3.6/5.5V
• Supply Current: 25mA
• Pin Count: 32
• Mounting: Surface Mount
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Compliant

18. Rapid Programming Algorithm
A 100 µs PGM pulse width is used to program. The address is set to the first location. V
is
CC
raised to 6.5V and V
is raised to 13.0V. Each address is first programmed with one 100 µs
PP
PGM 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
is then lowered to 5.0V and V
to 5.0V. All bytes are
PP
CC
read again and compared with the original data to determine if the device passes or fails.
AT27BV020
10
0902F–EPROM–12/07