W29C040P-90B Winbond Electronics, W29C040P-90B Datasheet - Page 22

• Manufacturer Part Number: W29C040P-90B
• Manufacturer: Winbond Electronics

Specifications of W29C040P-90B

• Density: 4Mb
• Access Time (max): 90ns
• Interface Type: Parallel
• Boot Type: Bottom/Top
• Address Bus: 19b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PLCC
• 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: 512K
• Supply Current: 50mA
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Reset Software Data Protection Timing Diagram
5 Volt-only Software Chip Erase Timing Diagram
Address A18-0
Address A18-0
DQ7-0
#WE
#OE
#CE
DQ7-0
#WE
#CE
#OE
5555
5555
T
SW0
T
SW0
WP
WP
AA
AA
T
T
WPH
WPH
2AAA
2AAA
SW1
SW1
T
55
T
55
BLC
BLC
Six-byte code for 5V-only software
Six-byte sequence for resetting
software data protection mode
5555
5555
SW2
SW2
80
80
- 22 -
chip erase
5555
5555
SW3
SW3
AA
AA
2AAA
SW4
2AAA
SW4
55
55
5555
SW5
5555
SW5
10
20
Internal programming starts
Internal erasing starts
T
WC
T
W29C040
WC