Microchip Technology AT49BV6416T-70TI

Overview

AT49BV6416T-70TI from Microchip Technology is a 64-megabit (4M × 16) asynchronous Flash memory IC operating from 2.7V to 3.6V, featuring 70 ns asynchronous access time and 20 ns page-mode read performance. It implements four-plane architecture with sector erase, suspend/resume capability, and CFI-compliant interface - deployed in embedded boot code storage, firmware update partitions, and industrial controller BIOS retention.

For engineers reviewing the AT49BV6416T-70TI datasheet, AT49BV6416T-70TI pinout, AT49BV6416T-70TI application, or AT49BV6416T-70TI equivalent, key selection criteria include TSOP-48 package compatibility, 2.2V I/O support via VCCQ, dual-word programming at 10V VPP, 128-bit protection register security, and concurrent read across three non-active memory planes.

Technical Context

The AT49BV6416T-70TI uses a four-plane memory organization (A–D, each 16 Mbit), enabling simultaneous read from any three planes while one undergoes program/erase. Its command-set architecture supports six-bus-cycle sector/plane erase, four-bus-cycle word programming, and single-pulse mode entry for accelerated writes.

Hardware data protection includes VCC sense (<1.8V inhibit), 10 ms power-on delay, noise filtering (<15 ns pulse rejection), and VPP-dependent program enable (≥1.65V required; 10V enables dual-word mode). Status detection relies on Data Polling (I/O7) and Toggle Bit (I/O6), configurable via a two-bit status register.

Key Specifications

Pinout & Package

AT49BV6416T-70TI is housed in a 48-pin Thin Small Outline Package (TSOP Type I, 12 × 20 mm), compliant with JEDEC MO-141AC, with gull-wing leads and standard 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SST39VF6401B-70-4C-EKE and MX29LV640ETTI-70G, the AT49BV6416T-70TI uniquely delivers concurrent plane access, VCCQ-controlled I/O voltage scaling, and integrated 128-bit security - making it optimal for real-time embedded systems requiring secure, low-latency firmware updates without bus arbitration delays.

Availability

AT49BV6416T-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot loaders, automotive infotainment head units, and telecom base station configuration requiring stable component supply across extended lifecycle programs.

Supply support for AT49BV6416T-70TI 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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.

The AT49BV6416T-70TI belongs to Microchip's legacy parallel-interface Flash memory product line, designed specifically for embedded systems requiring deterministic boot timing, in-system programmability, and hardware-enforced firmware integrity.

FAQ

What is the maximum operating temperature range for the AT49BV6416T-70TI?

The AT49BV6416T-70TI is rated for operation from –40°C to +85°C ambient temperature, with absolute maximum bias temperature up to +125°C. This industrial-grade thermal specification supports deployment in harsh environments such as factory automation controllers and automotive under-dash modules. The device maintains full 70 ns access time and reliable sector erase functionality across this range, verified per Microchip's qualification testing per AEC-Q100 stress conditions.

Does the AT49BV6416T-70TI support true 2.2V I/O operation?

Yes, the AT49BV6416T-70TI supports true 2.2V I/O operation via its dedicated VCCQ pin, which can be independently supplied from 2.2V to 3.6V while VCC remains at 2.7V–3.6V. This enables direct interfacing with low-voltage microcontrollers and FPGAs without level shifters. Output high levels are guaranteed at VCCQ – 0.1V, and input thresholds remain compatible with TTL/CMOS logic down to 2.2V, as confirmed in the DC Characteristics table of the 3451D datasheet.

How does the four-plane architecture improve system performance in the AT49BV6416T-70TI?

The four-plane architecture in the AT49BV6416T-70TI allows concurrent read operations from any three memory planes while the fourth is undergoing program or erase. This eliminates mandatory wait states during firmware updates - for example, a host processor can fetch real-time sensor data from Plane A while Plane B is being erased. Each plane contains 16 Mbit (1M × 16), and plane selection is implicit via address bits A21–A20, enabling seamless background operations without software intervention or additional hardware arbitration.

Can the AT49BV6416T-70TI be used as a drop-in replacement for the AT49BV6416-70TI?

No, the AT49BV6416T-70TI is not a drop-in replacement for the AT49BV6416-70TI. While both share identical density, timing, and pinout, the "T" suffix denotes top-boot configuration (boot sectors at highest address), whereas the non-T version uses bottom-boot (boot sectors at lowest address). This affects reset vector mapping and requires corresponding changes to bootloader initialization code and sector protection settings. The datasheet explicitly distinguishes their sector address maps (AT49BV6416T uses xxxx = 3F80H for Product ID Entry, vs. 0000H for AT49BV6416).

What happens to the AT49BV6416T-70TI during power loss mid-erase or mid-program?

During power loss mid-erase or mid-program, the AT49BV6416T-70TI enters an undefined state in the affected sector(s), with potential partial bit corruption. The device does not implement power-loss protection circuitry or auto-rollback. Recovery requires host firmware to detect failed status bits (I/O5 = 1 after Product ID Exit), verify sector integrity via checksum, and reissue the erase/program command. Critical applications must implement external brown-out detection and controlled shutdown to ensure command completion before power removal.