W29C040P-90B Winbond Electronics, W29C040P-90B Datasheet - Page 2

• 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

1. GENERAL DESCRIPTION
The W29C040 is a 4-megabit, 5-volt only CMOS page mode Flash Memory organized as 512K × 8
bits. The device can be written (erased and programmed) in-system with a standard 5V power supply.
A 12-volt V
program) operations with extremely low current consumption (compared to other comparable 5-volt
flash memory products.) The device can also be erased and programmed by using standard EPROM
programmers.
2. FEATURES
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Single 5-volt write (erase and program)
operations
Fast page-write operations
− 256 bytes per page
− Page write (erase/program) cycle: 5 mS
− Effective byte-write (erase/program) cycle
− Optional software-protected data write
Fast chip-erase operation: 50 mS
Two 16 KB boot blocks with lockout
Page write (erase/program) cycles: 50K (typ.)
Read access time: 70/90/120 nS
Ten-year data retention
(typ.)
time: 19.5 μS
PP
is not required. The unique cell architecture of the W29C040 results in fast write (erase/
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Available packages: 32-pin 600 mil DIP, TSOP
and PLCC
Software and hardware data protection
Low power consumption
− Active current: 25 mA (typ.)
− Standby current: 20 μA (typ.)
Automatic write (erase/program) timing with
internal V
End of write (erase/program) detection
− Toggle bit
− Data polling
Latched address and data
All inputs and outputs directly TTL compatible
JEDEC standard byte-wide pinouts
PP
generation
W29C040