Product Summary

The W29C040T-90B is a 4-megabit, 5-volt only CMOS page mode EEPROM organized as 512K X 8 bits. The device can be written (erased and programmed) in-system with a standard 5V power supply. A 12-volt VPP is not required. The unique cell architecture of the W29C040T-90B results in fast write (erase/program) operations with extremely low current consumption compared to other comparable 5-volt flash memory products. The W29C040T-90B can also be written (erased and programmed) by using standard EPROM programmers.

Parametrics

W29C040T-90B absolute maximum ratings: (1)Power Supply Voltage to Vss Potential:-0.5V to +7.0V; (2)Operating Temperature:0℃ to +70℃; (3)Storage Temperature:-65℃ to +150℃; (4)D.C. Voltage on Any Pin to Ground Potential Except A9:-0.5V to VDD +1.0V; (5)Transient Voltage (<20 nS ) on Any Pin to Ground Potential:-1.0V to VDD +1.0V; (6)Voltage on A9 and OE Pin to Ground Potential:-0.5V to 12.5V.

Features

W29C040T-90B features: (1)Single 5-volt write (erase and program) operations; (2)Fast page-write operations: 256 bytes per page, Page write (erase/program) cycle: 5 mS (typ.), Effective byte-write (erase/program) cycle time: 19.5 mS, Optional software-protected data write; (3)Fast chip-erase operation: 50 mS; (4)Two 16 KB boot blocks with lockout; (5)Typical page write (erase/program) cycles: 1K/10K (typ.); (6)Read access time: 90/120 nS; (7)Ten-year data retention; (8)Software and hardware data protection; (9)Low power consumption: Active current: 25 mA (typ.), Standby current: 20 mA (typ.); (10)Automatic write (erase/program) timing with internal VPP generation; (11)End of write (erase/program) detection: Toggle bit, Data polling; (12)Latched address and data; (13)All inputs and outputs directly TTL compatible; (14)JEDEC standard byte-wide pinouts; (15)Available packages: TSOP and PLCC.

Diagrams

W29C040T-90B block diagram

W29C011A
W29C011A

Other


Data Sheet

Negotiable 
W29C020
W29C020

Other


Data Sheet

Negotiable 
W29C020C
W29C020C

Other


Data Sheet

Negotiable 
W29C020CP90B
W29C020CP90B


IC FLASH 2MBIT 90NS 32PLCC

Data Sheet

Negotiable 
W29C022
W29C022

Other


Data Sheet

Negotiable 
W29C040
W29C040

Other


Data Sheet

Negotiable