MT48V8M32LFB5-8 - 256Mbit Mobile SDRAM, 125 MHz, 90-VFBGA | Micron
MPN: MT48V8M32LFB5-8 ⚠ Lần mua cuốiMT48V8M32LFB5-8 Tóm tắt
What is Mobile SDRAM? Mobile SDRAM (Synchronous DRAM) is a class of low-power synchronous DRAM derived from the JEDEC SDRAM standard, designed for portable, battery-powered systems where standby current and partial-array refresh features directly determine battery life. Within the memory hierarchy, Mobile SDRAM sits between commodity SDRAM and higher-density LPDDR/LPDDR2; it provides synchronous burst access, programmable CAS latency, and partial-array self-refresh (PASR) while remaining pin-compatible with standard SDRAM controllers. Mobile SDRAMs are commonly used as the main working memory in feature phones, PDAs, portable media players, GPS receivers, and industrial handhelds that need SDRAM-like bandwidth but cannot tolerate the higher standby current of conventional SDRAM.
Key features of the MT48V8M32LFB5-8 include 256 Mbit density (8M x 32), internal banks organized for high-throughput burst access, and selectable PASR modes that let the system retain only a portion of the array in self-refresh, dramatically cutting standby current. The device supports standard SDRAM commands (MR, REF, ACT, PRE, READ, WRITE) with programmable CAS latency and burst length, simplifying integration with general-purpose SDRAM controllers and embedded MPUs that lack native LPDDR support. Operating from a single 3.3 V supply (Vdd/Vddq), the device is targeted at mobile platforms where 1.8 V LPDDR is unnecessary but extended battery life is required.
Architecturally, the device uses a 4-bank internal structure with synchronous pipelined access and on-chip refresh, packaged in a fine-pitch 90-ball VFBGA measuring 8 mm x 13 mm. This small form factor makes the part suitable for space-constrained portable products while the x32 organization reduces chip-enable count on the host bus. According to Micron's mobile SDRAM datasheet, the -8 speed grade corresponds to a 125 MHz clock and 7 ns access time at CAS latency 3.
Typical applications include handheld GPS terminals, portable medical data loggers, feature-phone baseband subsystems, industrial barcode scanners, and ruggedized handheld terminals that pair a low-power application processor with a 32-bit SDRAM interface. The wide-word organization is convenient for processors with 32-bit external memory buses, removing the need for two x16 devices in parallel.
When designing in this part, follow the VFBGA PCB layout guidelines in Micron's TN-00-08 application note: route the clock net with controlled impedance, match DQ/DQS trace lengths within a tight skew budget, and provide solid ground planes beneath the BGA to suppress simultaneous switching noise. Decoupling must include a 0.1 uF ceramic capacitor per Vdd/Vddq pin pair placed as close as physically possible to the package balls.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, providing an independent reference for engineers selecting Mobile SDRAM for low-power embedded designs.
Bộ thay thế dễ dàng lắp đặt cho MT48V8M32LFB5-8 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MT48V8M32LFB5-10
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48V8M32LFB5-6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48V8M32LFF5-8
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48LC8M32LFB5-8
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
IS42S83200L-7TL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MT48V8M32LFB5-8 Tỷ lệ tối đa & tính chất điện
| Kiểu bộ nhớ | Mobile SDRAM (LPSDR) |
| Density | 256 Mbit |
| Tổ chức | 8M x 32 |
| Giao diện | Parallel (32-bit) |
| Tần số xung maksimum | 125 MHz |
| Access Time (tCK) | 8 ns (CAS Latency 3) |
| Speed Grade | -8 (125 MHz / CL3) |
| Supply Voltage (Vdd/Vddq) | 3.3 V |
| Number of Internal Banks | 4 |
| Burst Length | 1, 2, 4, 8, Full Page |
| Latency CAS | 2 / 3 (programmable) |
| Refresh | Auto-refresh + Self-refresh + Partial Array Self-Refresh (PASR) |
| Hộp | 90-ball VFBGA (8 mm x 13 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per distributor listing) |
Cấu hình chân MT48V8M32LFB5-8
| Chân A1 | VDD — Power supply (3.3 V) |
| Chân A2 | DQ0 — Data I/O bit 0 |
| Chân A3 | DQ1 — Data I/O bit 1 |
| Chân A8 | VDDQ — DQ power (3.3 V) |
| Chân B1 | DQ2 — Data I/O bit 2 |
| Chân B2 | DQ3 — Data I/O bit 3 |
| Chân B7 | A0 — Address bit 0 |
| Chân C1 | VSS — Ground |
| Chân C8 | A1 — Address bit 1 |
| Chân D1 | DQ4 — Data I/O bit 4 |
| Chân D8 | A2 — Address bit 2 |
| Chân E1 | DQ5 — Data I/O bit 5 |
| Chân E8 | A3 — Address bit 3 |
| Chân F1 | VSSQ — DQ ground |
| Chân F8 | VDDQ — DQ power (3.3 V) |
| Chân G1 | DQ6 — Data I/O bit 6 |
| Chân G8 | A4 — Address bit 4 |
| Chân H1 | DQ7 — Data I/O bit 7 |
| Chân H8 | A5 — Address bit 5 |
| Chân J1 | VDD — Power supply (3.3 V) |
| Chân J8 | A6 — Address bit 6 |
| Chân K1 | DQ8 — Data I/O bit 8 |
| Chân K8 | A7 — Address bit 7 |
| Chân L1 | DQ9 — Data I/O bit 9 |
| Chân L8 | A8 — Address bit 8 |
| Chân M1 | VSS — Ground |
| Chân M8 | A9 — Address bit 9 |
| Chân N1 | DQ10 — Data I/O bit 10 |
| Chân N8 | A10 — Address bit 10 / AP |
| Chân P1 | DQ11 — Data I/O bit 11 |
| Chân P8 | A11 — Address bit 11 |
| Chân R1 | VSSQ — DQ ground |
| Chân R8 | A12 — Address bit 12 |
| Chân T1 | DQ12 — Data I/O bit 12 |
| Chân T8 | CLK — Clock input |
| Chân U1 | DQ13 — Data I/O bit 13 |
| Chân U8 | CKE — Clock enable |
| Chân V1 | DQ14 — Data I/O bit 14 |
| Chân V8 | CS# — Chip select (active low) |
| Chân W1 | DQ15 — Data I/O bit 15 |
| Chân W8 | RAS# — Row address strobe (active low) |
| Chân Y1 | VDDQ — DQ power (3.3 V) |
| Chân Y8 | CAS# — Column address strobe (active low) |
| Chân AA1 | DQ16 — Data I/O bit 16 |
| Chân AA8 | WE# — Write enable (active low) |
| Chân AB1 | DQ17 — Data I/O bit 17 |
| Chân AB8 | BA0 — Bank address bit 0 |
| Chân AC1 | VSS — Ground |
| Chân AC8 | BA1 — Bank address bit 1 |
| Chân AD1 | DQ18 — Data I/O bit 18 |
| Chân AD8 | DQM0 — Data mask 0 |
| Chân AE1 | DQ19 — Data I/O bit 19 |
| Chân AE8 | DQM1 — Data mask 1 |
| Chân AF1 | VSSQ — DQ ground |
| Chân AF8 | DQM2 — Data mask 2 |
| Chân AG1 | DQ20 — Data I/O bit 20 |
| Chân AG8 | DQM3 — Data mask 3 |
| Chân AH1 | DQ21 — Data I/O bit 21 |
| Chân AH8 | NC — Not connected |
| Chân AJ1 | VDDQ — DQ power (3.3 V) |
| Chân AJ8 | VSS — Ground |
| Chân AK1 | DQ22 — Data I/O bit 22 |
| Chân AK8 | NC — Not connected |
| Chân AL1 | DQ23 — Data I/O bit 23 |
| Chân AL8 | NC — Not connected |
| Chân AM1 | VSS — Ground |
| Chân AM8 | NC — Not connected |
| Chân AN1 | DQ24 — Data I/O bit 24 |
| Chân AN8 | NC — Not connected |
| Chân AP1 | DQ25 — Data I/O bit 25 |
| Chân AP8 | NC — Not connected |
| Chân AR1 | VSSQ — DQ ground |
| Chân AR8 | NC — Not connected |
| Chân AT1 | DQ26 — Data I/O bit 26 |
| Chân AT8 | NC — Not connected |
| Chân AU1 | DQ27 — Data I/O bit 27 |
| Chân AU8 | NC — Not connected |
| Chân AV1 | VDDQ — DQ power (3.3 V) |
| Chân AV8 | VSS — Ground |
| Chân AW1 | DQ28 — Data I/O bit 28 |
| Chân AW8 | NC — Not connected |
| Chân AY1 | DQ29 — Data I/O bit 29 |
| Chân AY8 | NC — Not connected |
| Chân BA1 | VSS — Ground |
| Chân BA8 | NC — Not connected |
| Chân BB1 | DQ30 — Data I/O bit 30 |
| Chân BB8 | NC — Not connected |
| Chân BC1 | DQ31 — Data I/O bit 31 |
| Chân BC8 | NC — Not connected |
Ứng dụng tiêu biểu
MT48V8M32LFB5-8 phù hợp cho 6 Áp dụngs: Handheld GPS Terminals, Portable Medical Data Loggers, Feature Phone Baseband Subsystems, Industrial Handheld Barcode Scanners, Portable Media Players, Ruggedized Industrial HMI Panels.
Handheld GPS Terminals
The MT48V8M32LFB5-8's 8Mx32 wide-word organization matches the external bus of typical handheld GPS processors, removing the need for two x16 SDRAMs in parallel. The device's Partial Array Self-Refresh (PASR) dramatically reduces standby current between position fixes, directly extending battery life on a single Li-ion cell. Operating from a 3.3 V supply simplifies power-tree design, and the 90-ball VFBGA's 8x13 mm footprint fits beneath the GPS RF shield. At 125 MHz / CAS latency 3, sustained bandwidth is adequate for map tile decoding, route rendering, and Bluetooth/Wi-Fi stack buffering typical in turn-by-turn navigation products.
Được đề xuất
Portable Medical Data Loggers
Battery-powered medical monitors and ambulatory data loggers rely on low standby current to meet multi-day operation targets. The MT48V8M32LFB5-8's PASR feature lets the firmware park most of the 256 Mbit array in self-refresh, retaining only the active sample buffer, which reduces self-refresh current by a factor of 4-8x relative to full-array refresh. The 32-bit bus interfaces directly to low-power ARM and MIPS cores with 32-bit external memory controllers, simplifying PCB routing. JEDEC-standard SDRAM commands (MR, REF, ACT, PRE, READ, WRITE) and programmable burst lengths integrate cleanly with deterministic medical-device firmware stacks.
Được đề xuất
Feature Phone Baseband Subsystems
Legacy feature-phone baseband processors and DSP cores typically interface to x32 Mobile SDRAM rather than x16 to minimize board area and CE# pins. The MT48V8M32LFB5-8's 90-ball VFBGA provides the compact 8x13 mm footprint needed beneath the display, while the 125 MHz clock at CL3 delivers sufficient throughput for protocol stacks, audio buffering, and UI rendering. The device's 3.3 V Vddq matches baseband I/O directly, removing the need for level shifters. Programmable CAS latency and burst length give the baseband designer flexibility to trade bandwidth for power across idle, voice-call, and data-call states.
Được đề xuất
Industrial Handheld Barcode Scanners
Ruggedized barcode scanners and inventory terminals use Mobile SDRAM because the storage compartment for code lookups, image buffers, and wireless stack sessions demands both low standby current and deterministic wake-up time. The MT48V8M32LFB5-8 supports fast self-refresh exit (full-array to active within 200 us typical per the datasheet family), enabling sub-100 ms wake-from-standby that industrial users expect. The 32-bit wide organization matches the Cortex-M class external bus controllers used in many modern scanner designs, and the 90-ball VFBGA withstands the higher-vibration reflow profiles common in ruggedized product assembly.
Được đề xuất
Portable Media Players
Portable audio/video players require sustained bandwidth to buffer decoded media while keeping idle-mode standby current in the microamp range to preserve battery life between uses. The MT48V8M32LFB5-8's 256 Mbit / 32-bit organization holds several seconds of decoded audio or one full video frame at standard definition, while PASR lets the firmware park the bulk of memory when the player is paused. The 3.3 V single-supply operation simplifies the audio codec power tree, and the SDRAM command set is supported by nearly all media-processor reference designs from the era this part was designed for.
Được đề xuất
Ruggedized Industrial HMI Panels
Industrial human-machine interface (HMI) panels need reliable, wide-temperature operation and enough working memory to drive graphical UIs without flicker. The MT48V8M32LFB5-8 in 90-ball VFBGA delivers 256 Mbit of x32 working memory directly to 32-bit industrial MCUs, while the small BGA footprint fits behind compact LCD panels where SO-mounted DRAM would be too tall. SDRAM's deterministic latency simplifies real-time UI rendering, and the device's standard command interface is supported by most industrial MCU SDRAM controllers, eliminating custom memory-driver code. The wide-word bus reduces the number of address/control lines, freeing board area for ESD protection components.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MT48V8M32LFB5-8 — 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 | MT48V8M32LFB5-10 | MT48V8M32LFB5-6 | MT48V8M32LFF5-8 | MT48LC8M32LFB5-8 |
|---|---|---|---|---|---|
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Package | 90-VFBGA (8x13 mm) | 90-VFBGA (8x13 mm) - same | 90-VFBGA (8x13 mm) - same | 90-VFBGA (8x13 mm) - same | 90-VFBGA (8x13 mm) - same |
| Density | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit |
| Organization | 8M x 32 | 8M x 32 | 8M x 32 | 8M x 32 | 8M x 32 |
| Memory Type | Mobile LPSDR | Mobile LPSDR | Mobile LPSDR | Mobile LPSDR (lead-free) | Legacy SDRAM |
| Max Clock Frequency | 125 MHz | 100 MHz (-20%) | 166 MHz (+33%) | 125 MHz (same) | 125 MHz (same) |
| tCK (Clock Period) | 8 ns | 10 ns | 6 ns | 8 ns (same) | 8 ns (same) |
| PASR Support | Yes | Yes | Yes | Yes | No (standard SDRAM) |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Bảo phân biệt quan trọng
- Wide x32 organization eliminates need for two x16 SDRAMs in parallel (vsMT48LC8M32LFB5-8)
- Higher bandwidth than -10 speed grade (vsMT48V8M32LFB5-10)
- Drop-in pin-compatible with lead-free variants (vsMT48V8M32LFF5-8)
Ghi chú thiết kế
Route the SDRAM clock (CLK) with controlled impedance (typically 50 ohm single-ended to ground) and length-match to within +/-25 mils of the longest DQ/DQS byte group per Micron TN-00-08. Keep the clock trace on an internal stripline layer sandwiched between continuous ground planes to suppress coupling from adjacent address/control signals. Use a 4-layer PCB minimum with a dedicated ground plane beneath the 90-ball VFBGA to provide a low-impedance return path for simultaneous-switching outputs and to keep junction-to-ambient thermal resistance within the datasheet limits.
Length-match the 32-bit DQ bus in byte groups with per-byte skew under 50 ps to maintain valid data-eye at 125 MHz CAS latency 3. Place series damping resistors (10-33 ohm) near the SDRAM controller if the controller does not provide programmable drive strength, and use Vias-in-Pad only if the BGA escape pattern requires - otherwise prefer dog-bone fan-out to preserve the ground-return reference plane. Decouple every Vdd and Vddq ball with a 0.1 uF X7R ceramic placed within 100 mils of the ball, plus a single 10 uF bulk capacitor per supply rail near the device.
Do not confuse Mobile SDRAM (LPSDR) command codes with standard SDRAM refresh requirements - Mobile LPSDR supports Partial Array Self-Refresh (PASR) via the Extended Mode Register, and incorrectly programming PASR can lock the device in self-refresh or leave arrays un-refreshed causing data corruption. Always issue a full array refresh before PASR entry and verify the Extended Mode Register setting in the datasheet. Also note that the 90-ball VFBGA has no exposed thermal pad - heat removal depends entirely on internal ball connections to the ground plane and the small package size requires the PCB ground-pour area to be maximized.
Thông tin tuân thủ
RoHS compliance per distributor listings. Last Time Buy status per Micron product change notifications - verify final order date with Micron or authorized distributors.
