AT27LV520-90XI Atmel, AT27LV520-90XI Datasheet - Page 9

• Manufacturer Part Number: AT27LV520-90XI
• Description: IC OTP 512KBIT 90NS 20TSSOP
• Manufacturer: Atmel

Specifications of AT27LV520-90XI

• Format - Memory: EPROMs
• Memory Type: OTP EPROM
• Memory Size: 512K (64K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT27LV52090XI

18. Rapid Programming Algorithm
0911G–EPROM–8/07
A 50 µs ALE pulse width is used to program. The address is set to the first location. V
to 6.5V and OE/V
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 50 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. OE/V
pared with the original data to determine if the device passes or fails.
PP
INCREMENT ADDRESS
INCREMENT ADDRESS
PP
is raised to 13.0V. Each address is first programmed with one 50 µs ALE
is then lowered to V
YES
NO
ADDR.?
LAST
PROGRAM ONE 50 µS PULSE
PROGRAM ONE 50 µS PULSE
PASS
ADDR = FIRST LOCATION
ADDR = FIRST LOCATION
NO
TO ORIGINAL
PASS
VPP = 13.0V
IH
ALL BYTES
VCC = 6.5V
COMPARE
VCC = 5.0V
VPP = 5.0V
PASSED
VERIFY
DEVICE
ADDR.?
START
and V
DATA
X = 0
BYTE
LAST
YES
CC
to 5.0V. All bytes are read again and com-
FAIL
FAIL
INCREMENT X
NO
DEVICE
FAILED
X = 10?
YES
AT27LV520
CC
is raised
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