HN58S256AT-20 HITACHI [Hitachi Semiconductor], HN58S256AT-20 Datasheet - Page 13

• Manufacturer Part Number: HN58S256AT-20
• Description: 256 k EEPROM (32-kword x 8-bit)
• Manufacturer: HITACHI [Hitachi Semiconductor]

Data Protection
1. Data Protection against Noise on Control Pins (CE, OE, WE) during Operation
During readout or standby, noise on the control pins may act as a trigger and turn the EEPROM to
programming mode by mistake.
To prevent this phenomenon, this device has a noise cancelation function that cuts noise if its width is 20
ns or less in program mode.
Be careful not to allow noise of a width of more than 20 ns on the control pins.
WE
CE
OE
20 ns max
V
0 V
V
0 V
IH
IH
HN58S256A Series