W29C020-90 Winbond Electronics, W29C020-90 Datasheet - Page 14

• Manufacturer Part Number: W29C020-90
• Manufacturer: Winbond Electronics

Specifications of W29C020-90

• Density: 2Mb
• Access Time (max): 90ns
• Interface Type: Parallel
• Boot Type: Bottom/Top
• Address Bus: 18b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PDIP
• Program/erase Volt (typ): 5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 256K
• Supply Current: 50mA
• Mounting: Through Hole
• Pin Count: 32
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Timing Waveforms, continued
WE Controlled Write Cycle Timing Diagram
CE Controlled Write Cycle Timing Diagram
Address A17-0
DQ7-0
WE
CE
OE
Address A17-0
DQ7-0
WE
CE
OE
High Z
T
AS
T
OES
T
CS
T
T
OES
AS
T
CS
T
T
AH
AH
T
WP
- 14 -
T
CP
Data Valid
Data Valid
T
DS
T
DS
T
T
T
CH
OEH
T
DH
WPH
T
T
DH
CH
T
T
OEH
WPH
Internal Write Starts
T
WC
Internal write starts
T
WC
W29C020