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Am29DL400B Product Overview
4 Megabit (512 K x 8-Bit/256 K x 16-Bit),
CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory
General Description
The Am29DL400B is a 4 Mbit, 3.0 Volt-only flash memory device. This device requires only a single 3.0 Volt VCC supply to perform read, program, and erase operations. A standard EPROM programmer can also be used to program and erase the device. The standard device offers access times of 70, 80, 90, and 120 ns. The device is offered in 44-pin SO and 48-pin TSOP packages.
Distinctive Characteristics
Architectural Advantages
- Simultaneous Read/Write operations
- Host system can program or erase in one bank, then immediately and simultaneously read from the other bank
- Zero latency between read and write operations
- Read-while-erase
- Read-while-program
- Single power supply operation
- 2.7 to 3.6 Volt read and write operations for battery-powered applications
- Manufactured on 0.23 µm process technology
- Flexible sector architecture
- Two 16 Kword, two 8 Kword, four 4 Kword, and six 32 Kword sectors in word mode
- Two 32 Kbyte, two 16 Kbyte, four 8 Kbyte, and six 64 Kbyte sectors in byte mode
- Any combination of sectors can be erased
- Supports full chip erase
- Top or bottom boot block configurations available
- Compatible with JEDEC standards
- Pinout and software compatible with single-power-supply flash standard
- Superior inadvertent write protection
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Package Options
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Performance Characteristics
- High performance
- Access time as fast 70 ns
- Program time: 7 µs/word typical utilizing Accelerate function
- Low current consumption (typical values at 5 MHz)
- 7 mA active read current
- 21 mA active read-while-program or read-while erase current
- 17 mA active program-while-erase-suspended current
- 200 nA in standby mode
- 200 nA in automatic sleep mode
- Standard tCE chip enable access time applies to transition from automatic sleep mode to active mode
- Minimum 1 million program/erase cycles guaranteed per sector
- 20 Year data retention at 125°C
- Reliable operation for the life of the system
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Software Features
- Unlock Bypass Program Command
- Reduces overall programming time when issuing multiple program command sequences
- Data# Polling and Toggle Bits
- Provides a software method of detecting program or erase cycle completion
- Erase Suspend/Erase Resume
- Suspends or resumes erasing sectors to allow reading and programming in other sectors
- No need to suspend if sector is in the other bank
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Hardware Features
- Sector protection
- Hardware method of locking a sector to prevent any program or erase operation within that sector
- Sectors can be locked in-system or via programming equipment
- Temporary Sector Unprotect feature allows code changes in previously locked sectors
- Ready/Busy# output (RY/BY#)
- Hardware method for detecting program or erase cycle completion
- Hardware reset pin (RESET#)
- Hardware method of resetting the device to reading array data
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