Model No: MX29F040CQI-70G

Macronix MX29F040CQI-70G

Manufacturer: Macronix
SEMICON NO.: MX29F040CQI-70G
Package: 32-PLCC
Stock: In stock
Description: IC FLASH 4M-Bit Parallel 32PLCC
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 Mfr  Macronix 
 Device Type NOR Flash Memory   
 Memory Size / Density  4 Mbit 
 Memory Organization 512K x 8 (512K words × 8 bits)
 Interface Type  Parallel
 Architecture Uniform Sector
 Access Time (Max)  70 ns 
 Byte Programming Time (Typ) 9 µs    
 Supply Voltage (Vcc) 4.5 V to 5.5 V (5.0V nominal)
 Active Current (Max) 30 mA 
 Programming Voltage 4.5V to 5.5V (single supply)
 Operating Temperature -40°C to +85°C 
 Package 32-PLCC
 Mounting Type
 Surface Mount
 Compliance    
 RoHS Compliant
MX29F040CQI-70G 4M-Bit Parallel NOR Flash Memory 
TheMX29F040CQI-70G is a high-reliability 4M-bit (512K×8) parallel NOR flash memory from Macronix, engineered for non-volatile code storage and data retention in legacy embedded and industrial systems. Operating on a single 5.0V supply for read, erase, and program operations, it features a 70ns fast access time to support quick data retrieval, with eight uniform 64K-byte sectors for flexible erase management. Built with advanced CMOS technology, it delivers a minimum of 100,000 erase/program cycles and 20-year data retention, paired with erase suspend/resume functionality and JEDEC-standard command compatibility. Housed in a 32-pin PLCC surface-mount package, this RoHS-compliant device offers seamless drop-in replacement for legacy flash designs and supports in-system programming for easy firmware updates.
Operating across a 0°C to 70°C commercial temperature range, the MX29F040CQI-70G features low power consumption with a 30mA maximum active current and 1µA typical standby current to minimize energy usage. It includes hardware sector protection, temporary sector unprotect, and low VCC write inhibit (≤3.2V) to prevent accidental data modification, along with latch-up protection (-1V to VCC+1V) and robust ESD resilience. The MX29F memory chip uses a command register architecture with auto program/erase verification, data polling, and toggle bit status feedback for reliable operation control, fully complying with JEDEC parallel flash standards for broad microcontroller compatibility.
Alternative parallel flash memoryModels
● Macronix MX29F040CQC-70G: 32-PLCC 4M-bit parallel flash, identical electrical specs with enhanced thermal performance for industrial use.
● AMD AM29F040B-70PC: 32-PLCC 4M-bit NOR flash, pin-compatible JEDEC-standard substitute for legacy system upgrades.
● Winbond W29EE040-70B: 32-PLCC 4M-bit parallel flash, low-power alternative with matching 70ns access time.
● SST SST29EE040-70-4C-PHE: 32-PLCC 4M-bit flash, cost-effective replacement with robust data retention and cycle life.