Microchip Technology AT49LD3200B-13TC

Overview

AT49LD3200B-13TC from Microchip (formerly Atmel) is a 32-Mbit synchronous Flash memory organized as 2,097,152 × 16 bits (word mode) or 1,048,576 × 32 bits (double word mode), supporting burst read up to 100 MHz with RAS latency = 2 and CAS latency = 6, tSAC = 7 ns, and 3.0–3.6 V operation. It integrates an independent 8K × 16-bit asynchronous boot block with hardware lockout and sector erase architecture for embedded boot code storage in SDRAM-bus-compatible systems.

For engineers reviewing the AT49LD3200B-13TC datasheet, AT49LD3200B-13TC pinout, AT49LD3200B-13TC application, or AT49LD3200B-13TC equivalent, this device serves as a high-bandwidth, drop-in synchronous replacement for legacy SDRAM-coupled Flash in industrial control, network boot loaders, and FPGA configuration storage - requiring precise clock-synchronized timing, programmable burst length (4/8), and dual-mode x16/x32 organization.

Technical Context

The AT49LD3200B-13TC implements a synchronous DRAM-style interface with all operations aligned to the rising edge of CLK, enabling gapless burst reads and eliminating shadow RAM requirements. Its Mode Register Set (MRS) allows runtime configuration of RAS latency (1–2), CAS latency (2–8), burst length (4/8), and burst type (sequential/interleaved).

It features dual-voltage programming (3 V typical / 12 V fast), sector-erase architecture with eight 4-Mbit sectors, and hardware-protected asynchronous boot block (8K × 16) activated automatically at power-up. Input/output pins are LVTTL-compatible, and DQM enables cycle-accurate output masking during partial bursts.

Key Specifications

Pinout & Package

86-pin TSOP Type II package with off-center parting line (OCPL) for improved mechanical reliability and thermal cycling performance in industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX29LV320ETTI-70G and IS42S16160F-7BL, the AT49LD3200B-13TC uniquely combines nonvolatile storage, synchronous burst capability, and programmable timing - enabling single-chip boot+runtime memory architectures where clock-aligned throughput and firmware persistence are both essential.

Availability

AT49LD3200B-13TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, network router boot loader deployment, FPGA configuration memory, and medical imaging system BIOS requiring stable component supply across extended product lifecycles.

Supply support for AT49LD3200B-13TC 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 acquired Atmel in 2016 and continues to manufacture and support the SFlash™ family, leveraging high-performance CMOS process technology for reliable nonvolatile memory solutions.

The AT49LD3200B-13TC belongs to Microchip's synchronous Flash (SFlash™) product line, designed specifically to replace asynchronous Flash in SDRAM-bus-based systems - delivering boot code integrity, high-bandwidth firmware execution, and industrial-grade reliability.

FAQ

What is the key functional difference between AT49LD3200B-13TC and AT49LD3200-13TC?

The AT49LD3200B-13TC automatically activates its 8K × 16-bit asynchronous boot block at power-up, whereas the AT49LD3200-13TC requires explicit Mode Register Set (MRS) command to enable the same boot block. This makes AT49LD3200B-13TC more suitable for systems requiring guaranteed boot code availability without software intervention during cold start. Both share identical timing, pinout, and electrical specifications.

How does the WORD pin affect memory organization in AT49LD3200B-13TC?

In AT49LD3200B-13TC, the WORD pin selects data bus width: logic high configures x32 organization (1,048,576 × 32 bits), while logic low configures x16 organization (2,097,152 × 16 bits). The pin state must be set and stabilized before power-up or first command; changing it mid-operation is undefined. Address mapping and burst behavior adapt accordingly, with column address bits differing between modes (CA6 for x32, CA7 for x16).

Can AT49LD3200B-13TC operate without a 12 V supply?

Yes - AT49LD3200B-13TC operates fully at 3.0–3.6 V for read, write, and erase functions. The 12 V supply on VPP is optional and used only to accelerate programming (30 µs/word vs. 100 µs/word at 3 V) and sector erase (1.6 s vs. 2.5 s). Systems without 12 V capability can rely entirely on 3 V operation, though firmware update times will increase proportionally.

What is the purpose of the DQM pin in AT49LD3200B-13TC?

The DQM (Data-out Mask) pin in AT49LD3200B-13TC enables cycle-accurate suppression of output data during burst reads. When asserted high two clocks before a desired data cycle, it forces DQ0–DQ31 into high-impedance for that cycle - useful for masking invalid or unused words in partial bursts. It functions synchronously with CLK and does not affect internal memory state or timing parameters like tSAC or tOH.

How is boot block lockout verified and disabled in AT49LD3200B-13TC?

Boot block lockout status is verified using the Boot Block Lockout Verify command (5-cycle sequence ending in 90H), which outputs 00H/02H if unlocked or 01H/03H if locked on DQ0–DQ7. To disable lockout, the MR pin must be temporarily driven to 12 V after boot block activation - this overrides hardware protection. Once MR returns to TTL levels, lockout re-engages unless explicitly cleared via new programming.