General Description
The S29AL004D is a 4 Mbit, 3.0 volt-only Flash memory organized as 524,288 bytes or 262,144 words. The device is offered in 48-ball FBGA, 44-pin SO, and 48-pin TSOP packages. The word-wide data (x16) appears on DQ15–DQ0; the byte-wide (x8) data appears on DQ7–DQ0. 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.

Distinctive Characteristics
Architectural Advantages
■ Single power supply operation
   — 2.7 to 3.6 volt read and write operations for battery powered applications
■ Manufactured on 200nm process technology
   — Compatible with 320nm Am29LV400B and MBM29LV400T/BC
■ Flexible sector architecture
   — One 16 Kbyte, two 8 Kbyte, one 32 Kbyte, and seven 64 Kbyte sectors (byte mode)
   — One 8 Kword, two 4 Kword, one 16 Kword, and seven 32 Kword sectors (word mode)
   — Supports full chip erase
■ Unlock Bypass Program Command
   — Reduces overall programming time when issuing multiple program command sequences
■ Top or bottom boot block configurations available
■ Embedded Algorithms
   — Embedded Erase algorithm automatically preprograms and erases the entire chip or any combination of designated sectors
   — Embedded Program algorithm automatically writes and verifies data at specified addresses
■ Compatibility with JEDEC standards
   — Pinout and software compatible with single-power supply Flash
   — Superior inadvertent write protection
■ Sector Protection features
   — A hardware method of locking a sector to prevent any program or erase operations within that sector
   — Sectors can be locked in-system or via programming equipment
   — Temporary Sector Unprotect feature allows code changes in previously locked sectors
  
Performance Characteristics
■ High performance
   — Access times as fast as 70 ns
■ Ultra low power consumption (typical values at 5 MHz)
   — 200 nA Automatic Sleep mode current
   — 200 nA standby mode current
   — 9 mA read current
   — 20 mA program/erase current
■ Cycling Endurance: 1,000,000 cycles per sector typical
■ Data Retention: 20 years typical Package Options
■ 48-ball FBGA
■ 48-pin TSOP
■ 44-pin SO

Software Features
■ Data# Polling and toggle bits
   — Provides a software method of detecting program or erase operation completion
■ Erase Suspend/Erase Resume
   — Suspends an erase operation to read data from, or program data to, a sector that is not being erased, then resumes the erase operation

Hardware Features
■ Ready/Busy# pin (RY/BY#)
   — Provides a hardware method of detecting program or erase cycle completion
■ Hardware reset pin (RESET#)
   — Hardware method to reset the device to reading array data