Microchip Technology AT49BV001ANT-55VU

Overview

AT49BV001ANT-55VU from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 55 ns read access time, 30 µs typical byte programming, and sector-erasable architecture including one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). It supports DATA polling and toggle-bit erase/program status detection and is used in embedded firmware storage for industrial microcontroller systems requiring field-upgradable code.

For engineers reviewing the AT49BV001ANT-55VU datasheet, AT49BV001ANT-55VU pinout, AT49BV001ANT-55VU application, or AT49BV001ANT-55VU equivalent, key selection criteria include boot-block lockout capability (enabled via command sequence), 50 µA CMOS standby current, hardware data protection (VCC sense, noise filtering), sector erase timing (3 s max), and compatibility with standard EPROM-like CE/OE/WE control interface.

Technical Context

The AT49BV001ANT-55VU implements a nonvolatile CMOS Flash architecture with internal program control logic and autonomous erase timing-no external clocks required. Its sector organization enables selective erasure of the boot block (16K bytes, address range 1C000H–1FFFFH), parameter blocks (8K × 2), and main memory blocks (32K + 64K bytes), all managed via six-cycle software command sequences.

It operates in standard EPROM read mode (CE/OE low, WE high) and supports byte-by-byte programming using 4-cycle command entry. Boot block lockout-once enabled-is persistent under ≤5.5 V supply and requires 12 V on RESET to override, a feature absent in the AN(T) variant but confirmed active in the ANT variant per datasheet Section 4.6.2 and Ordering Code mapping.

Key Specifications

Pinout & Package

AT49BV001ANT-55VU is packaged in a 32-lead VSOP (8 × 14 mm, package code 32V), RoHS-compliant and Pb/halide-free. Pin 9 is No Connect (NC) per datasheet Section 2.2 and Figure 2.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Flash memory applications.

Compared with SST39VF010-55-4C-NHE and MX29LV010BTC-55G, the AT49BV001ANT-55VU uniquely integrates boot block lockout controllable via RESET pin voltage (not VPP), retains EPROM-compatible timing, and delivers deterministic 3 s erase with dual status detection-making it optimal for industrial firmware where physical security and interface compatibility are mandatory.

Availability

AT49BV001ANT-55VU is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, and telecom line cards requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AT49BV001ANT-55VU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.

The AT49BV001A(N)(T) series was designed as a drop-in EPROM replacement for 8-bit embedded systems needing in-system reprogrammability, low-voltage operation, and hardware-secured boot code storage.

FAQ

What is the boot block address range for AT49BV001ANT-55VU?

The boot block for AT49BV001ANT-55VU occupies addresses 1C000H to 1FFFFH (16K bytes), distinct from the AT49BV001AN(T)'s 00000H–03FFFH range. This relocation ensures backward compatibility while enabling separate firmware partitioning in newer designs. The AT49BV001ANT-55VU datasheet explicitly confirms this mapping in Section 4.6 and Table 5 (Command Definition).

Does AT49BV001ANT-55VU support 12 V boot block override?

Yes, AT49BV001ANT-55VU supports 12 V ± 0.5 V applied to the RESET pin to override boot block lockout during chip erase, sector erase, or byte programming-enabling factory reflash without hardware modification. This feature is documented in Section 4.6.2 and is functional only on the ANT variant, not the AN(T) version.

What package type does AT49BV001ANT-55VU use?

AT49BV001ANT-55VU uses a 32-lead VSOP (8 × 14 mm) package, designated as package code 32V per Atmel's Ordering Information (Section 27.2). Pin 9 is NC, and the package is Pb/halide-free, meeting RoHS Directive 2011/65/EU requirements.

How is end-of-program detected on AT49BV001ANT-55VU?

AT49BV001ANT-55VU provides two hardware methods: DATA polling (I/O7 returns complement of programmed data until completion, then true data) and toggle-bit detection (I/O6 toggles during active programming and stabilizes upon completion). Both are usable concurrently and require no external timing components.

Is AT49BV001ANT-55VU compatible with standard EPROM timing?

Yes, AT49BV001ANT-55VU operates in EPROM read mode with identical CE/OE/WE control timing: CE and OE low, WE high. Its tACC (55 ns), tCE (55 ns), and tOE (≤30 ns) match industry-standard 27C010 EPROMs, enabling direct socket replacement without timing adjustments in legacy 8-bit systems.