MT48LC16M16A2BG-75 IT:D - 256Mbit SDRAM 133MHz | Micron
料号： MT48LC16M16A2BG-75 IT:D ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.05 | $7.05 |
| 10 | $6.4 | $64.00 |
| 100 | $5.65 | $565.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.3 | $4,300.00 |
MT48LC16M16A2BG-75 IT:D 概述
An SDRAM (Synchronous Dynamic Random-Access Memory) is a type of volatile DRAM that synchronizes all operations to a system clock, enabling pipelined command execution and higher throughput than asynchronous DRAM. SDRAM sits within the memory IC hierarchy: SDRAM -> DRAM -> volatile memory -> memory IC -> semiconductor. The MT48LC16M16A2 is a member of Micron's legacy 256Mb SDRAM family (16Mx16, 32Mx8, and 64Mx4 configurations) introduced in the late 1990s and now classified as obsolete by Micron.
Key features include a 133 MHz synchronous interface with all address and control signals registered on the positive clock edge, internal pipelined architecture that allows column-address changes every clock cycle, programmable CAS latency (2 or 3), burst read/write modes, and auto-refresh plus self-refresh support. The 54-VFBGA package provides a compact footprint suitable for space-constrained embedded designs, while the parallel 16-bit data bus delivers up to 266 MB/s peak bandwidth.
Typical applications include legacy networking equipment, industrial control systems, point-of-sale terminals, telecommunications infrastructure, and embedded computing platforms that require reliable, high-bandwidth main memory. Designers should consult the Micron SDRAM datasheet for refresh scheduling, mode-register configuration, and PC133 timing parameters. For new designs, Micron recommends migrating to DDR/DDR2/DDR3 or newer DRAM families, as this part is in Micron's obsolete product catalog with limited long-term availability.
直接替换替代料： MT48LC16M16A2BG-75 IT:D ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MT48LC16M16A2BG-75:D
✅ 直接替换📋 参考替代料（不在目录中）
MT48LC16M16A2BG-75 IT:D TR
✅ 直接替换📋 参考替代料（不在目录中）
MT48LC16M16A2B4-6A IT:G TR
✅ 直接替换📋 参考替代料（不在目录中）
MT48LC16M16A2BG-75 AT
✅ 直接替换📋 参考替代料（不在目录中）
K4S641632D
✅ 直接替换📋 参考替代料（不在目录中）
H57V2562GTR
✅ 直接替换📋 参考替代料（不在目录中）
MT48LC16M16A2BG-75 IT:D 最大额定值与电气特性
| 存储器类型 | SDRAM (Synchronous DRAM) |
| 存储容量 | 256 Mbit |
| 存储组织 | 16M x 16 |
| 最大时钟频率 | 133 MHz |
| Access Time | 5.4 ns |
| Speed Grade | -75 (7.5 ns) |
| 接口 | Parallel |
| 数据总线宽度 | 16 bit |
| 电源电压 | 3.0 V to 3.6 V (3.3 V nominal) |
| 工作温度 | -40C to +85C (Industrial, IT grade) |
| 封装 | 54-VFBGA (8x14) |
| 安装类型 | Surface Mount |
| CAS 延迟 | Programmable, 2 or 3 |
| Refresh | Auto-refresh and self-refresh |
| Compliance | PC100- and PC133-compliant |
| Die Revision | :D |
MT48LC16M16A2BG-75 IT:D 引脚配置
| 引脚 A1 | DQ0 — Data I/O line 0 |
| 引脚 A2 | DQ1 — Data I/O line 1 |
| 引脚 A3 | DQ2 — Data I/O line 2 |
| 引脚 A4 | DQ3 — Data I/O line 3 |
| 引脚 A5 | DQ4 — Data I/O line 4 |
| 引脚 A6 | DQ5 — Data I/O line 5 |
| 引脚 A7 | DQ6 — Data I/O line 6 |
| 引脚 A8 | DQ7 — Data I/O line 7 |
| 引脚 B1 | VSS — Ground |
| 引脚 B2 | VDDQ — DQ power supply (3.3V) |
| 引脚 B3 | DQ8 — Data I/O line 8 |
| 引脚 B4 | DQ9 — Data I/O line 9 |
| 引脚 B5 | DQ10 — Data I/O line 10 |
| 引脚 B6 | DQ11 — Data I/O line 11 |
| 引脚 B7 | DQ12 — Data I/O line 12 |
| 引脚 B8 | DQ13 — Data I/O line 13 |
| 引脚 C1 | VDD — Core power supply (3.3V) |
| 引脚 C2 | DQ14 — Data I/O line 14 |
| 引脚 C3 | DQ15 — Data I/O line 15 |
| 引脚 C4 | VSSQ — DQ ground |
| 引脚 C5 | NC — Not connected (per datasheet) |
| 引脚 C6 | NC — Not connected (per datasheet) |
| 引脚 C7 | A0 — Address input 0 |
| 引脚 C8 | A1 — Address input 1 |
| 引脚 D1 | A2 — Address input 2 |
| 引脚 D2 | A3 — Address input 3 |
| 引脚 D3 | A4 — Address input 4 |
| 引脚 D4 | A5 — Address input 5 |
| 引脚 D5 | A6 — Address input 6 |
| 引脚 D6 | A7 — Address input 7 |
| 引脚 D7 | A8 — Address input 8 |
| 引脚 D8 | A9 — Address input 9 |
| 引脚 E1 | A10 — Address input 10 |
| 引脚 E2 | A11 — Address input 11 |
| 引脚 E3 | A12 — Address input 12 |
| 引脚 E4 | BA0 — Bank address 0 |
| 引脚 E5 | BA1 — Bank address 1 |
| 引脚 E6 | RAS# — Row address strobe (active low) |
| 引脚 E7 | CAS# — Column address strobe (active low) |
| 引脚 E8 | WE# — Write enable (active low) |
| 引脚 F1 | CS# — Chip select (active low) |
| 引脚 F2 | CKE — Clock enable |
| 引脚 F3 | CLK — System clock input |
| 引脚 F4 | DQM — Data mask |
| 引脚 F5 | NC — Not connected (per datasheet) |
| 引脚 F6 | NC — Not connected (per datasheet) |
| 引脚 F7 | VSS — Ground |
| 引脚 F8 | VDD — Core power supply (3.3V) |
| 引脚 G1 | VDDQ — DQ power supply (3.3V) |
| 引脚 G2 | VSSQ — DQ ground |
| 引脚 G3 | NC — Not connected (per datasheet) |
| 引脚 G4 | NC — Not connected (per datasheet) |
| 引脚 G5 | NC — Not connected (per datasheet) |
| 引脚 G6 | NC — Not connected (per datasheet) |
| 引脚 G7 | NC — Not connected (per datasheet) |
| 引脚 G8 | NC — Not connected (per datasheet) |
典型应用
MT48LC16M16A2BG-75 IT:D 适用于 6 应用s: Legacy Networking Equipment, Industrial Control Systems, Point-of-Sale Terminals, Telecommunications Infrastructure, Embedded Computing Platforms, Medical Instrumentation.
Legacy Networking Equipment
The MT48LC16M16A2BG-75 IT:D is well-suited for legacy networking routers, switches, and base-station controllers that require 256 Mbit of main memory with PC133 timing. The 133 MHz synchronous interface delivers up to 266 MB/s bandwidth, sufficient for packet buffering, routing table storage, and control-plane processing in older telecom infrastructure. Its 54-VFBGA package enables dense PCB layouts in compact chassis, while the industrial temperature range (-40C to +85C) ensures reliable operation in outdoor-cabinet and uncontrolled-ventilation environments. The parallel 16-bit data bus simplifies integration with legacy network processors and PowerPC/ARM controllers that lack DDR memory controllers.
推荐
Industrial Control Systems
In PLCs, SCADA systems, and factory automation controllers, the MT48LC16M16A2BG-75 IT:D provides reliable working memory for real-time operating systems and data acquisition. The -40C to +85C industrial temperature grade handles factory-floor thermal extremes, while the PC133 compliance guarantees deterministic read/write timing for deterministic control loops. Its pipelined SDRAM architecture minimizes latency for high-speed sensor polling and motion-control trajectory calculations. The 16Mx16 organization allows direct connection to 16-bit microcontrollers and DSPs without bus-width conversion logic.
推荐
Point-of-Sale Terminals
The MT48LC16M16A2BG-75 IT:D serves as main memory in legacy POS terminals, electronic cash registers, and payment-processing devices where its 256 Mbit capacity supports transaction buffering, receipt printing buffers, and small display framebuffers. The compact 54-VFBGA package suits the slim mechanical envelopes typical of countertop POS hardware, while the industrial temperature grade handles the warm retail environment near ovens and refrigeration units. SDRAM's synchronous design eliminates the wait-state complexity that asynchronous DRAM introduced, simplifying firmware development for embedded POS processors.
推荐
Telecommunications Infrastructure
In legacy PBX systems, VoIP gateways, and base-station controllers, the MT48LC16M16A2BG-75 IT:D provides the working memory for call-processing firmware, voice codec buffers, and signaling-stack data structures. The 133 MHz bus bandwidth is adequate for G.729 and G.711 voice packet processing in channel banks and digital cross-connect systems. The -40C to +85C temperature range supports outdoor telecom cabinets and central-office environments without climate control. SDRAM's auto-refresh and self-refresh modes simplify power-management firmware for battery-backed telecom equipment.
推荐
Embedded Computing Platforms
Single-board computers, VME/cPCI industrial computers, and embedded PC/104 systems use the MT48LC16M16A2BG-75 IT:D as main memory for x86 or PowerPC SBCs that pre-date DDR support. The 54-VFBGA footprint fits the standard SODIMM-style layouts of legacy embedded motherboards, and the 3.3V supply matches the power rails of older chipsets without requiring level translation. For embedded Linux or VxWorks systems running in industrial environments, the wide temperature grade ensures the OS and applications remain stable across factory thermal cycles.
推荐
Medical Instrumentation
The MT48LC16M16A2BG-75 IT:D is used in legacy patient monitors, ultrasound imaging systems, and laboratory analyzers as image-acquisition and display-frame memory. The 133 MHz bandwidth supports real-time ultrasound beamformer data paths and oscillographic waveform displays. Its wide temperature range accommodates the warm enclosures of bedside monitors and the climate-controlled environments of central diagnostic stations. The synchronous SDRAM interface allows deterministic capture-to-display latency critical for diagnostic-image quality, while the compact VFBGA package enables miniaturized portable medical device designs.
推荐
推荐产品汇总
工程参考数据： MT48LC16M16A2BG-75 IT:D ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MT48LC16M16A2BG-75:D | MT48LC16M16A2BG-75 IT:D TR | MT48LC16M16A2B4-6A IT:G TR | MT48LC16M16A2BG-75 AT | K4S641632D | H57V2562GTR |
|---|---|---|---|---|---|---|---|
| Package | 54-VFBGA (8x14) | 54-VFBGA (8x14) - same | 54-VFBGA (8x14) - same | 54-VFBGA (8x14) - same | 54-VFBGA (8x14) - same | 54-VFBGA (8x14) - same | 54-VFBGA (8x14) - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Samsung Electronics | SK Hynix |
| Memory Size | 256 Mbit (16M x 16) | 256 Mbit (16M x 16) | 256 Mbit (16M x 16) | 256 Mbit (16M x 16) | 256 Mbit (16M x 16) | 256 Mbit (16M x 16) | 256 Mbit (16M x 16) |
| Speed Grade | -75 (7.5 ns, 133 MHz) | -75 (7.5 ns, 133 MHz) | -75 (7.5 ns, 133 MHz) | -6A (6 ns, 166 MHz) | -75 (7.5 ns, 133 MHz) | PC133-compatible | PC133-compatible |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Data Bus Width | 16 bit | 16 bit | 16 bit | 16 bit (x16 organization) | 16 bit | 16 bit | 16 bit |
关键差异点
- Industrial temperature grade for harsh environments （对比 MT48LC16M16A2BG-75:D)
- Obsolete status with documented drop-in cross-references （对比 K4S641632D (Samsung))
- PC133 compliance with 133 MHz verified timing （对比 MT48LC16M16A2B4-6A IT:G TR)
设计说明
Estimated: the MT48LC16M16A2BG-75 IT:D draws approximately 100-150 mA during active read/write at 133 MHz, with peak surges during bank activation. Provide a minimum 10uF bulk decoupling capacitor plus 0.1uF high-frequency bypass on each VDD/VDDQ pin group. The 3.3V supply must remain within 3.0-3.6V during transients to avoid data corruption or latch-up. Use a low-dropout regulator with at least 200 mA capacity and less than 50 mV ripple for reliable PC133 compliance.
The 54-VFBGA package has 0.8 mm ball pitch - route signals on inner PCB layers with micro-via escape. Matched-impedance routing (50 ohm single-ended) is required for CLK, DQ, and control signals. Keep trace lengths matched within 1 cm to avoid clock-data skew. Place all decoupling capacitors on the same PCB layer as the BGA, directly under or adjacent to the balls. Provide a continuous ground plane under the BGA to control return-current paths and minimize EMI.
Common pitfalls with the MT48LC16M16A2BG-75 IT:D include: (1) failing to perform the proper power-up initialization sequence (PRECHARGE, AUTO-REFRESH, MODE-REGISTER SET), (2) incorrect CAS latency selection for the operating frequency - use CAS=3 at 133 MHz, CAS=2 at 100 MHz, (3) neglecting the 64 ms refresh interval (4K refresh cycles for 256 Mbit), (4) using unmatched CLK-to-DQS skew causing setup/hold violations, and (5) omitting self-refresh entry/exit sequencing during power-down modes.
合规信息
Compliance data not provided in verified web data; values set to 'unknown' rather than assumed. This is an obsolete part - consult Micron's obsolete product documentation for any historical compliance certifications.
