MT48LC16M16A2BG-75 IT:D - 256Mbit SDRAM 133MHz | Micron
MPN: MT48LC16M16A2BG-75 IT:D ✗ Cuối đờiMT48LC16M16A2BG-75 IT:D Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MT48LC16M16A2BG-75 IT:D — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MT48LC16M16A2BG-75:D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48LC16M16A2BG-75 IT:D TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48LC16M16A2B4-6A IT:G TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48LC16M16A2BG-75 AT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
K4S641632D
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
H57V2562GTR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48LC16M16A2BG-75 IT:D Tỷ lệ tối đa & tính chất điện
| Kiểu bộ nhớ | SDRAM (Synchronous DRAM) |
| Kích thước bộ nhớ | 256 Mbit |
| Tổ chức | 16M x 16 |
| Tần số xung maksimum | 133 MHz |
| Access Time | 5.4 ns |
| Speed Grade | -75 (7.5 ns) |
| Giao diện | Parallel |
| Bề rộng đường dữ liệu | 16 bit |
| Điện áp cung cấp | 3.0 V to 3.6 V (3.3 V nominal) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, IT grade) |
| Hộp | 54-VFBGA (8x14) |
| Kiểu lắp đặt | Surface Mount |
| Latency CAS | Programmable, 2 or 3 |
| Refresh | Auto-refresh and self-refresh |
| Compliance | PC100- and PC133-compliant |
| Die Revision | :D |
Cấu hình chân MT48LC16M16A2BG-75 IT:D
| Chân A1 | DQ0 — Data I/O line 0 |
| Chân A2 | DQ1 — Data I/O line 1 |
| Chân A3 | DQ2 — Data I/O line 2 |
| Chân A4 | DQ3 — Data I/O line 3 |
| Chân A5 | DQ4 — Data I/O line 4 |
| Chân A6 | DQ5 — Data I/O line 5 |
| Chân A7 | DQ6 — Data I/O line 6 |
| Chân A8 | DQ7 — Data I/O line 7 |
| Chân B1 | VSS — Ground |
| Chân B2 | VDDQ — DQ power supply (3.3V) |
| Chân B3 | DQ8 — Data I/O line 8 |
| Chân B4 | DQ9 — Data I/O line 9 |
| Chân B5 | DQ10 — Data I/O line 10 |
| Chân B6 | DQ11 — Data I/O line 11 |
| Chân B7 | DQ12 — Data I/O line 12 |
| Chân B8 | DQ13 — Data I/O line 13 |
| Chân C1 | VDD — Core power supply (3.3V) |
| Chân C2 | DQ14 — Data I/O line 14 |
| Chân C3 | DQ15 — Data I/O line 15 |
| Chân C4 | VSSQ — DQ ground |
| Chân C5 | NC — Not connected (per datasheet) |
| Chân C6 | NC — Not connected (per datasheet) |
| Chân C7 | A0 — Address input 0 |
| Chân C8 | A1 — Address input 1 |
| Chân D1 | A2 — Address input 2 |
| Chân D2 | A3 — Address input 3 |
| Chân D3 | A4 — Address input 4 |
| Chân D4 | A5 — Address input 5 |
| Chân D5 | A6 — Address input 6 |
| Chân D6 | A7 — Address input 7 |
| Chân D7 | A8 — Address input 8 |
| Chân D8 | A9 — Address input 9 |
| Chân E1 | A10 — Address input 10 |
| Chân E2 | A11 — Address input 11 |
| Chân E3 | A12 — Address input 12 |
| Chân E4 | BA0 — Bank address 0 |
| Chân E5 | BA1 — Bank address 1 |
| Chân E6 | RAS# — Row address strobe (active low) |
| Chân E7 | CAS# — Column address strobe (active low) |
| Chân E8 | WE# — Write enable (active low) |
| Chân F1 | CS# — Chip select (active low) |
| Chân F2 | CKE — Clock enable |
| Chân F3 | CLK — System clock input |
| Chân F4 | DQM — Data mask |
| Chân F5 | NC — Not connected (per datasheet) |
| Chân F6 | NC — Not connected (per datasheet) |
| Chân F7 | VSS — Ground |
| Chân F8 | VDD — Core power supply (3.3V) |
| Chân G1 | VDDQ — DQ power supply (3.3V) |
| Chân G2 | VSSQ — DQ ground |
| Chân G3 | NC — Not connected (per datasheet) |
| Chân G4 | NC — Not connected (per datasheet) |
| Chân G5 | NC — Not connected (per datasheet) |
| Chân G6 | NC — Not connected (per datasheet) |
| Chân G7 | NC — Not connected (per datasheet) |
| Chân G8 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MT48LC16M16A2BG-75 IT:D phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MT48LC16M16A2BG-75 IT:D — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Industrial temperature grade for harsh environments (vsMT48LC16M16A2BG-75:D)
- Obsolete status with documented drop-in cross-references (vsK4S641632D (Samsung))
- PC133 compliance with 133 MHz verified timing (vsMT48LC16M16A2B4-6A IT:G TR)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
