Microchip Technology AT49LD3200B-13TI

Overview

AT49LD3200B-13TI 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), operating at 3.0–3.6 V with programmable RAS/CAS latencies and burst lengths. It features an independent 8K × 16-bit asynchronous boot block, sector erase architecture (eight 4-Mbit sectors), and supports 100 MHz burst read (tSAC = 7 ns) in double-word mode for embedded boot code storage.

For engineers reviewing the AT49LD3200B-13TI datasheet, AT49LD3200B-13TI pinout, AT49LD3200B-13TI application, or AT49LD3200B-13TI equivalent, this device serves as a high-bandwidth, drop-in-capable replacement for SDRAM-bus-compatible Flash in boot-critical industrial controllers, FPGA configuration storage, and real-time firmware update systems requiring deterministic timing and hardware lockout protection.

Technical Context

The AT49LD3200B-13TI implements a synchronous DRAM-style interface with rising-edge clock sampling, supporting programmable RAS latency (1 or 2), CAS latency (2–8), burst length (4 or 8), and burst type (sequential or interleaved). Its dual-mode organization (x16/x32) is selected via the WORD pin at power-up, and all commands-including Mode Register Set, sector erase, and program-are synchronized to CLK with CKE-controlled power-down entry/exit.

It integrates an autonomous asynchronous boot block (8K × 16 bits, A0–A12 addressable) that activates automatically on power-up, enabling immediate code fetch without clock initialization. Sector erase (2.5 s @ 3 V) and fast program (100 µs/word @ 3 V) are executed via six-cycle and four-cycle command sequences respectively, with DATA polling (DQ7 complement) for cycle completion detection.

Key Specifications

Pinout & Package

86-pin TSOP Type II package with off-center parting line (OCPL) for enhanced solder joint integrity and thermal cycling reliability. Pinout conforms to JEDEC MO-142 standard for synchronous Flash devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETXGI-90G, the AT49LD3200B-13TI delivers higher bandwidth via synchronous burst reads, deterministic boot timing through its auto-activated boot block, and hardware-enforced firmware protection-making it uniquely suited for real-time embedded systems requiring both performance and security.

Availability

AT49LD3200B-13TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, FPGA configuration memory, medical device bootloaders, and automotive ECU update storage requiring stable component supply across extended product lifecycles.

Supply support for AT49LD3200B-13TI 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 maintains full support for the legacy SFlash™ product family, including long-term manufacturing, documentation, and technical resources.

The AT49LD3200B-13TI belongs to Atmel's SFlash™ synchronous Flash memory line, designed specifically to replace slower asynchronous Flash on SDRAM buses while delivering boot-critical reliability, hardware-based security, and seamless integration with existing memory controllers.

FAQ

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

The AT49LD3200B-13TI automatically activates its 8K × 16-bit asynchronous boot block on power-up, whereas the AT49LD3200-13TI requires explicit Mode Register Set (MRS) command to enable the same boot block. This makes AT49LD3200B-13TI ideal for systems needing guaranteed immediate boot code access without software intervention. Both share identical density, timing specs, and pinout.

Does AT49LD3200B-13TI support true synchronous burst reads at 100 MHz in x32 mode?

Yes, AT49LD3200B-13TI supports burst reads up to 100 MHz in double-word (x32) mode with RAS latency = 2 and CAS latency = 6, achieving a 10 ns cycle time and 7 ns tSAC. This is validated in the official datasheet (Rev. 1940B) under AC Read Characteristics and requires proper VCCQ decoupling and matched trace routing to sustain.

How is hardware lockout enabled on the boot block of AT49LD3200B-13TI?

Hardware lockout on the AT49LD3200B-13TI boot block is enabled by issuing the five-cycle Boot Block Lockout command (0xAA, 0x55, 0xAA, 0x55, 0x40) while VPP = 12 V and MR = 12 V. Once locked, the boot block cannot be programmed or erased using ≤3.6 V signals. Verification is performed via Boot Block Lockout Verify command reading DQ0–DQ7.

Can AT49LD3200B-13TI operate without connecting VPP?

Yes, AT49LD3200B-13TI operates fully at 3.0–3.6 V without VPP connection. VPP is optional and used only to enable 12 V fast programming (30 µs/word) or 12 V boot block lockout. In standard 3 V operation, program time is 100 µs/word and sector erase takes 2.5 seconds-both fully functional with VPP left unconnected or tied to VCC.

What does the "-13" suffix in AT49LD3200B-13TI signify?

The "-13" in AT49LD3200B-13TI denotes the maximum supported clock frequency grade: 13 ns minimum CLK cycle time, corresponding to ≤75 MHz operation (RAS=2, CAS=5). This is confirmed in the DC and AC Operating Range table (page 5), where AT49LD3200(B)-13 is specified for 0°C–70°C commercial and -40°C–85°C industrial temperature ranges at 3.0–3.6 V.