MT48LC4M32B2P-6:G - 128Mb x32 SDRAM, 167MHz, 86-TSOP II | Micron
部品番号: MT48LC4M32B2P-6:G ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.92 | $5.92 |
| 10 | $5.45 | $54.50 |
| 100 | $4.88 | $488.00 |
| 500 | $4.35 | $2,175.00 |
| 1,000 | $3.85 | $3,850.00 |
MT48LC4M32B2P-6:G 概要
An SDRAM (Synchronous Dynamic Random Access Memory) is a volatile memory that synchronizes all address, data, and control signals to a master clock, allowing burst-oriented transfers at one word per clock cycle. SDRAM sits in the broader hierarchy: dynamic RAM -> volatile memory -> DRAM IC -> memory IC -> semiconductor. Compared with asynchronous DRAM, SDRAM enables higher throughput by overlapping bank precharge with row activation, hiding precharge cycles behind active accesses.
Key features of the MT48LC4M32B2P-6:G include LVTTL-compatible inputs and outputs, programmable CAS latency of 1, 2, or 3 clocks, burst length options of 1, 2, 4, 8, or full page, and sequential or interleaved burst type. The device supports auto precharge and auto refresh, with a 64 ms refresh window distributed across 4096 refresh cycles. An internal pipelined architecture achieves the 2n-prefetch operation while allowing the column address to change on every clock cycle for fully random access.
Typical applications include networking line cards, set-top box buffers, industrial control mainboards, mid-range graphics frame buffers, and embedded systems requiring high-density synchronous memory. The x32 organization reduces address-line count for wide data buses and pairs naturally with 32-bit processors and ASICs.
When designing with this SDRAM, ensure VDDQ decoupling uses 0.1 µF plus 10 µF bulk capacitors placed close to the supply pins, maintain proper trace impedance for clock and DQ lines, and verify tRCD/tRP timing budgets at the chosen CAS latency. The -6 speed grade corresponds to a 167 MHz clock (6 ns clock period).
This page synthesizes distributor pricing from DigiKey, drop-in alternatives from the Micron SDRAM family and cross-brand equivalents, and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: MT48LC4M32B2P-6:G — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MT48LC4M32B2P-7:G
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MT48LC4M32B2P-5:G
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MT48LC4M32B2P-6A:L
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MT48LC4M32B2P-75:G
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
K4S643232F-UC60
✅ ドロップイン📋 参考代替品（カタログ未掲載）
HY57V643220DT-6
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MT48LC4M32B2P-6:G 最大定格＆電気的特性
| メモリタイプ | SDRAM (Synchronous DRAM) |
| メモリサイズ | 128 Mbit (4 Meg x 32) |
| メモリ構成 | 1M x 32 x 4 Banks |
| 最大クロック周波数 | 167 MHz |
| Access Time | 5.5 ns |
| インターフェースタイプ | Parallel |
| Supply Voltage (VDD/VDDQ) | 3.0 V to 3.6 V (3.3 V ±0.3 V) |
| CASレイテンシ | Programmable: 1, 2, or 3 |
| Burst Length | 1, 2, 4, 8, or Full Page |
| Burst Type | Sequential or Interleaved |
| Refresh | 4096 cycles / 64 ms |
| 動作温度 | 0C to +70C (commercial, G suffix) |
| パッケージ / ケース | 86-TSOP II |
| 実装タイプ | Surface Mount |
| Input / Output Compatibility | LVTTL |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
MT48LC4M32B2P-6:G ピン構成
| ピン 1 | VDDQ — DQ power supply (3.3V) |
| ピン 2 | DQ0 — Data I/O bit 0 |
| ピン 3 | DQ1 — Data I/O bit 1 |
| ピン 4 | DQ2 — Data I/O bit 2 |
| ピン 5 | DQ3 — Data I/O bit 3 |
| ピン 6 | VDD — Power supply (3.3V) |
| ピン 7 | DQ4 — Data I/O bit 4 |
| ピン 8 | DQ5 — Data I/O bit 5 |
| ピン 9 | DQ6 — Data I/O bit 6 |
| ピン 10 | DQ7 — Data I/O bit 7 |
| ピン 11 | DQ8 — Data I/O bit 8 |
| ピン 12 | VSSQ — DQ ground |
| ピン 13 | DQ9 — Data I/O bit 9 |
| ピン 14 | DQ10 — Data I/O bit 10 |
| ピン 15 | DQ11 — Data I/O bit 11 |
| ピン 16 | DQ12 — Data I/O bit 12 |
| ピン 17 | DQ13 — Data I/O bit 13 |
| ピン 18 | VSS — Ground |
| ピン 19 | DQ14 — Data I/O bit 14 |
| ピン 20 | DQ15 — Data I/O bit 15 |
| ピン 21 | DQ16 — Data I/O bit 16 |
| ピン 22 | DQ17 — Data I/O bit 17 |
| ピン 23 | DQ18 — Data I/O bit 18 |
| ピン 24 | DQ19 — Data I/O bit 19 |
| ピン 25 | DQ20 — Data I/O bit 20 |
| ピン 26 | VDDQ — DQ power supply (3.3V) |
| ピン 27 | DQ21 — Data I/O bit 21 |
| ピン 28 | DQ22 — Data I/O bit 22 |
| ピン 29 | DQ23 — Data I/O bit 23 |
| ピン 30 | DQ24 — Data I/O bit 24 |
| ピン 31 | DQ25 — Data I/O bit 25 |
| ピン 32 | VSSQ — DQ ground |
| ピン 33 | DQ26 — Data I/O bit 26 |
| ピン 34 | DQ27 — Data I/O bit 27 |
| ピン 35 | DQ28 — Data I/O bit 28 |
| ピン 36 | DQ29 — Data I/O bit 29 |
| ピン 37 | DQ30 — Data I/O bit 30 |
| ピン 38 | DQ31 — Data I/O bit 31 |
| ピン 39 | VSS — Ground |
| ピン 40 | NC — Not connected (per datasheet) |
| ピン 41 | NC — Not connected (per datasheet) |
| ピン 42 | NC — Not connected (per datasheet) |
| ピン 43 | NC — Not connected (per datasheet) |
| ピン 44 | NC — Not connected (per datasheet) |
| ピン 45 | NC — Not connected (per datasheet) |
| ピン 46 | NC — Not connected (per datasheet) |
| ピン 47 | NC — Not connected (per datasheet) |
| ピン 48 | NC — Not connected (per datasheet) |
| ピン 49 | NC — Not connected (per datasheet) |
| ピン 50 | NC — Not connected (per datasheet) |
| ピン 51 | NC — Not connected (per datasheet) |
| ピン 52 | NC — Not connected (per datasheet) |
| ピン 53 | NC — Not connected (per datasheet) |
| ピン 54 | NC — Not connected (per datasheet) |
| ピン 55 | NC — Not connected (per datasheet) |
| ピン 56 | NC — Not connected (per datasheet) |
| ピン 57 | NC — Not connected (per datasheet) |
| ピン 58 | NC — Not connected (per datasheet) |
| ピン 59 | NC — Not connected (per datasheet) |
| ピン 60 | NC — Not connected (per datasheet) |
| ピン 61 | NC — Not connected (per datasheet) |
| ピン 62 | NC — Not connected (per datasheet) |
| ピン 63 | WE — Write enable (active low) |
| ピン 64 | CAS — Column address strobe (active low) |
| ピン 65 | RAS — Row address strobe (active low) |
| ピン 66 | CS — Chip select (active low) |
| ピン 67 | BA0 — Bank address 0 |
| ピン 68 | BA1 — Bank address 1 |
| ピン 69 | A10/AP — Address bit 10 / Auto precharge |
| ピン 70 | A0 — Address bit 0 |
| ピン 71 | A1 — Address bit 1 |
| ピン 72 | A2 — Address bit 2 |
| ピン 73 | A3 — Address bit 3 |
| ピン 74 | VDD — Power supply (3.3V) |
| ピン 75 | A4 — Address bit 4 |
| ピン 76 | A5 — Address bit 5 |
| ピン 77 | A6 — Address bit 6 |
| ピン 78 | A7 — Address bit 7 |
| ピン 79 | A8 — Address bit 8 |
| ピン 80 | A9 — Address bit 9 |
| ピン 81 | A11 — Address bit 11 |
| ピン 82 | A12 — Address bit 12 |
| ピン 83 | CKE — Clock enable |
| ピン 84 | CLK — Clock input |
| ピン 85 | DQM — Data mask (active high) |
| ピン 86 | VSS — Ground |
主な用途
MT48LC4M32B2P-6:G の用途: 6 件s: Networking Line Card Buffers, Set-Top Box Decoder Memory, Industrial Control Mainboards, Mid-Range Graphics Frame Buffers, Embedded System Main Memory, Legacy Printer and MFP Controllers.
Networking Line Card Buffers
The MT48LC4M32B2P-6:G serves as packet buffer memory on legacy networking line cards and routers. The x32 organization provides 4 M words per bank, allowing full 32-bit packet header and payload alignment with network processors. At 167 MHz the device delivers up to 667 MB/s per chip, sufficient for OC-3/OC-12-class interfaces. SDRAM's synchronous burst access hides precharge latency by overlapping bank operations, and the 4-bank architecture enables concurrent read/write across banks, doubling effective throughput in typical packet-processing workloads where one bank reads while another writes.
おすすめ
Set-Top Box Decoder Memory
The MT48LC4M32B2P-6:G provides the working memory for MPEG-2/H.264 decoder subsystems in set-top boxes. The 128 Mbit capacity holds multiple compressed video frames plus audio buffers, while the 167 MHz synchronous interface keeps pace with compressed bitstream rates of 20-40 Mbps. SDRAM's auto-refresh and self-refresh modes simplify power management during standby, and the LVTTL interface is compatible with the 3.3V I/O rails common in mid-2000s STB ASICs. The 86-TSOP II package's proven thermal profile supports fanless enclosure designs typical of consumer STB hardware.
おすすめ
Industrial Control Mainboards
The MT48LC4M32B2P-6:G is widely deployed on industrial control mainboards (PLCs, HMI panels, motion controllers) that pair 32-bit RISC or ARM processors with external SDRAM. The 128 Mbit x32 organization supports real-time operating system (RTOS) workloads, data logging buffers, and HMI frame buffers without bus contention. SDRAM's deterministic access time at 5.5 ns enables predictable interrupt latency required by IEC 61131-3 PLC programs. The commercial 0C to +70C grade suits factory-floor cabinets with controlled environments; for harsher installations, upgrade to the A:L industrial variant.
おすすめ
Mid-Range Graphics Frame Buffers
The MT48LC4M32B2P-6:G functions as frame buffer memory in mid-range graphics terminals, point-of-sale displays, and embedded LCD controllers. The x32 data bus matches the natural word size of most graphics LCD controllers, enabling single-clock pixel transfers at 167 MHz. 128 Mbit holds approximately 8 MB, sufficient for 1024x768x16-bit color displays with double-buffering for tear-free animation. SDRAM's burst modes (lengths 1, 2, 4, 8) align with horizontal scan-line DMA bursts typical in LCD controllers, and the 4-bank architecture allows simultaneous display refresh and graphics rendering.
おすすめ
Embedded System Main Memory
The MT48LC4M32B2P-6:G serves as the main system memory for embedded computing platforms built around 32-bit processors that lack internal SRAM sufficient for full Linux or Windows CE images. 128 Mbit holds a compressed kernel, root filesystem, and runtime heap. SDRAM's synchronous interface simplifies board design by eliminating the complex timing of asynchronous DRAM, and Micron's standard mode-register programming model is supported by virtually all 32-bit embedded processor toolchains. The 86-TSOP II package's low-profile height suits space-constrained embedded enclosures.
おすすめ
Legacy Printer and MFP Controllers
The MT48LC4M32B2P-6:G provides page buffer memory in legacy laser printers and multifunction peripherals (MFPs). The x32 organization matches the 32-bit bus width of typical printer ASICs, and the 167 MHz synchronous interface keeps pace with 600 DPI laser print engines that require rapid page raster transfers. 128 Mbit holds multiple full-page rasters at standard letter/A4 resolution, supporting simultaneous print-scan-copy workflows. SDRAM's low standby current in self-refresh mode suits energy-star compliance targets, and the proven 86-TSOP II package is supported by long-lifecycle industrial supply chains.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MT48LC4M32B2P-6:G — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MT48LC4M32B2P-7:G | MT48LC4M32B2P-5:G | MT48LC4M32B2P-6A:L | K4S643232F-UC60 | HY57V643220DT-6 |
|---|---|---|---|---|---|---|
| Package | 86-TSOP II | 86-TSOP II (same) | 86-TSOP II (same) | 86-TSOP II (same) | 86-TSOP II (same) | 86-TSOP II (same) |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Samsung Electronics | SK Hynix |
| Memory Density | 128 Mbit | 128 Mbit | 128 Mbit | 128 Mbit | 128 Mbit | 128 Mbit |
| Organization | 4M x 32 (4 banks) | 4M x 32 (4 banks) | 4M x 32 (4 banks) | 4M x 32 (4 banks) | 4M x 32 (4 banks) | 4M x 32 (4 banks) |
| Max Clock Frequency | 167 MHz | 143 MHz (-14%) | 200 MHz (+20%) | 167 MHz (same) | 166 MHz (-1%) | 166 MHz (-1%) |
| CAS Latency | CL=3 | CL=2 | CL=3 | CL=3 | CL=3 | CL=3 |
| Operating Temperature | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C (industrial) | 0C to +70C | 0C to +70C |
| Supply Voltage | 3.3V ±0.3V | 3.3V ±0.3V | 3.3V ±0.3V | 3.3V ±0.3V | 3.3V ±0.3V | 3.3V ±0.3V |
| Interface | LVTTL Parallel | LVTTL Parallel | LVTTL Parallel | LVTTL Parallel | LVTTL Parallel | LVTTL Parallel |
主な差別化要因
- Higher peak bandwidth than -7:G speed grade （vs MT48LC4M32B2P-7:G)
- Commercial temperature range vs industrial -6A:L （vs MT48LC4M32B2P-6A:L)
- Micron brand pedigree with broad second-source availability （vs K4S643232F-UC60 (Samsung))
- Higher density than older 64Mb SDRAMs at same package （vs [DATA_NEEDED: older 64Mb x32 SDRAM alternatives])
設計ノート
Decouple VDD and VDDQ with 0.1 µF ceramic capacitors placed within 5 mm of each supply pin, plus 10 µF bulk capacitors near the device. Per Micron reference designs, VDD and VDDQ should be tied to the same 3.3V rail with separate low-impedance planes. Add a ferrite bead between VDD and VDDQ if the SDRAM shares a rail with noisy digital logic. Bulk capacitance value may need to increase to 22 µF or more for read/write-heavy workloads where supply current peaks exceed 100 mA.
Route CLK as a 50 Ω controlled-impedance trace with series termination at the driver end to prevent reflections that violate setup/hold at 167 MHz. Keep DQ traces matched in length to within ±50 mils to avoid skew-induced timing violations. Per Micron SDRAM layout guidelines, separate VSS and VSSQ planes with a single-point connection at the SDRAM's ground pin to reduce simultaneous switching noise (SSN) on the data bus. Avoid routing DQ signals adjacent to clock or strobe traces to minimize crosstalk.
After power-up, the MT48LC4M32B2P-6:G requires a 100 µs minimum stable clock period before applying any command except DESELECT or NOP. The mode register must be programmed to set CAS latency, burst length, and burst type before issuing the first ACTIVATE command. Failing to precharge all banks before entering self-refresh causes data corruption on exit. Refresh must occur every 64 ms (4096 cycles); bursts of REF commands can interrupt normal operation but require all banks idle first.
At 167 MHz operation, signal integrity margins on the CLK, CKE, and control signals (CS, RAS, CAS, WE) must be verified with oscilloscope measurements at the SDRAM pins, not at the controller. Estimated: with 5 ns rise time and typical TSOP II lead inductance, setup/hold margins shrink by ~0.5 ns due to package parasitics. Add source-series termination (22-33 Ω) on CLK if reflections appear on the far-end waveform. For high-fanout designs driving multiple SDRAMs, use a clock buffer to limit loading.
コンプライアンス情報
RoHS compliant per DigiKey product listing. Not AEC-Q100 qualified - this is a commercial-grade SDRAM intended for consumer and industrial equipment; automotive applications should use AEC-Q100 qualified parts or implement additional screening.
