JS28F320J3F75A - 32Mbit Parallel NOR Flash, 75ns, 56-TSOP | Micron
部品番号: JS28F320J3F75A ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.88 | $4.88 |
| 10 | $4.39 | $43.90 |
| 100 | $3.78 | $378.00 |
| 500 | $3.25 | $1,625.00 |
| 1,000 | $2.86 | $2,860.00 |
JS28F320J3F75A 概要
A parallel NOR flash is a non-volatile memory type that supports random read access (execute-in-place / XIP), byte-level program, and sector erase operations. Within the memory hierarchy, NOR flash sits between SRAM (volatile, fastest) and NAND flash (non-volatile, higher density, sequential access). NOR is preferred when a microprocessor needs to fetch code directly from the array without first copying to RAM, and when reliable long-term data retention with low software complexity is required.
Key features include symmetric 128-Kbyte uniform blocks (parameter blocks) or 64-Kword blocks, top or bottom boot block configurations, hardware write protection, a deep power-down mode for low standby current, and command-set compatibility with the Common Flash Interface (CFI). The device supports 100,000 program/erase cycles per block and a minimum 20-year data retention. Its 75 ns access time makes it suitable for microprocessors and ASICs operating at bus frequencies up to approximately 50 MHz without wait states, or higher with proper handshaking.
Typical applications include set-top boxes, networking equipment, industrial controllers, automotive infotainment, printers, and any embedded design requiring execute-in-place boot storage. The 56-TSOP footprint is widely supported on legacy and new PCBs, simplifying hardware integration.
When designing with this device, ensure the host microcontroller supplies a clean 3.3 V rail within the 2.7 V-3.6 V tolerance, and respect the program/erase timing budget. Adding a 0.1 uF decoupling capacitor close to VCC and VCCQ pins is recommended for reliable operation across temperature.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. All values are referenced to current Micron datasheet and live distributor inventory as of 2026-10-05.
ドロップイン代替品: JS28F320J3F75A — 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:
JS28F320J3F75B
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
JS28F320J3F70A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
JS28F320J3D75A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
JS28F640J3F75A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
JS28F320J3F75A
✅ ドロップイン✓ 在庫あり
$2.86 / 個
データシートを見る →JS28F128J3F75A
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
JS28F320J3F75A 最大定格＆電気的特性
| メモリタイプ | Non-Volatile NOR Flash |
| メモリサイズ | 32 Mbit (4 MB) |
| メモリ構成 | 4M x 8 / 2M x 16 (configurable) |
| Technology | NOR, Single Bit per Cell (SBC), 65 nm |
| Access Time (Initial) | 75 ns |
| インターフェースタイプ | Parallel (Async) |
| Supply Voltage (VCC) | 2.7 V to 3.6 V (typ. 3.0 V / 3.3 V) |
| Program/Erase Cycles | 100,000 per block (typ.) |
| Data Retention | 20 years (min) |
| Block Size | 128 Kbyte / 64 Kword uniform blocks |
| Boot Block Configuration | Top or Bottom (variant dependent) |
| パッケージ | 56-pin TSOP Type I (Tape & Reel) |
| 動作温度 | -40 C to +85 C (Industrial) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
JS28F320J3F75A ピン構成
| ピン 1 | A21 — Address input 21 |
| ピン 2 | A20 — Address input 20 |
| ピン 3 | A19 — Address input 19 |
| ピン 4 | A18 — Address input 18 |
| ピン 5 | A17 — Address input 17 |
| ピン 6 | A7 — Address input 7 |
| ピン 7 | A6 — Address input 6 |
| ピン 8 | A5 — Address input 5 |
| ピン 9 | A4 — Address input 4 |
| ピン 10 | A3 — Address input 3 |
| ピン 11 | A2 — Address input 2 |
| ピン 12 | A1 — Address input 1 |
| ピン 13 | A0 — Address input 0 |
| ピン 14 | CE# — Chip Enable (active low) |
| ピン 15 | DQ0 — Data I/O 0 (x16: DQ0) |
| ピン 16 | DQ8 — Data I/O 8 (x16: DQ8 / x8: NC) |
| ピン 17 | DQ1 — Data I/O 1 |
| ピン 18 | DQ9 — Data I/O 9 (x16) / NC (x8) |
| ピン 19 | DQ2 — Data I/O 2 |
| ピン 20 | DQ10 — Data I/O 10 (x16) / NC (x8) |
| ピン 21 | DQ3 — Data I/O 3 |
| ピン 22 | DQ11 — Data I/O 11 (x16) / NC (x8) |
| ピン 23 | VCC — Power supply (2.7 V - 3.6 V) |
| ピン 24 | DQ4 — Data I/O 4 |
| ピン 25 | DQ12 — Data I/O 12 (x16) / NC (x8) |
| ピン 26 | DQ5 — Data I/O 5 |
| ピン 27 | DQ13 — Data I/O 13 (x16) / NC (x8) |
| ピン 28 | DQ6 — Data I/O 6 |
| ピン 29 | DQ14 — Data I/O 14 (x16) / NC (x8) |
| ピン 30 | DQ7 — Data I/O 7 |
| ピン 31 | DQ15 — Data I/O 15 (x16) / DQ7 in x8 |
| ピン 32 | VSS — Ground |
| ピン 33 | BYTE# — x8 (low) / x16 (high) mode select |
| ピン 34 | A16 — Address input 16 |
| ピン 35 | A15 — Address input 15 |
| ピン 36 | A14 — Address input 14 |
| ピン 37 | A13 — Address input 13 |
| ピン 38 | A12 — Address input 12 |
| ピン 39 | A11 — Address input 11 |
| ピン 40 | A10 — Address input 10 |
| ピン 41 | A9 — Address input 9 |
| ピン 42 | A8 — Address input 8 |
| ピン 43 | OE# — Output Enable (active low) |
| ピン 44 | RP# — Reset / Deep Power-Down (active low) |
| ピン 45 | WE# — Write Enable (active low) |
| ピン 46 | VCCQ — Output buffer supply (tie to VCC) |
| ピン 47 | WP# — Write Protect (active low) |
| ピン 48 | STS — Status output (RY/BY# equivalent) |
| 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 | VSS — Ground |
主な用途
JS28F320J3F75A の用途: 7 件s: Embedded Boot / Firmware Storage, Set-Top Box Firmware Storage, Industrial PLC / Controller Data Logging, Networking Router / Switch Firmware, Printer Controller Firmware, Automotive Infotainment / Cluster Storage, Medical Device Firmware / Parameter Storage.
Embedded Boot / Firmware Storage
The JS28F320J3F75A's 75 ns parallel access and 32 Mbit capacity suit it for boot ROM replacement in embedded systems where the host microcontroller (MCU/MPU) fetches code directly from flash via execute-in-place (XIP). Its 56-TSOP footprint fits standard 32-bit microcontroller buses, and the CFI command set allows generic flash drivers to identify block geometry without vendor-specific code. With 100,000 program/erase cycles per block, this NOR flash supports robust in-field firmware updates over the product lifetime.
おすすめ
Set-Top Box Firmware Storage
Set-top boxes and digital TV receivers traditionally use parallel NOR flash to store the bootloader, real-time operating system kernel, and configuration data because of fast XIP access and proven reliability. The JS28F320J3F75A's 32 Mbit capacity holds typical STB firmware images plus channel maps and DRM certificates. The 2.7 V to 3.6 V VCC range aligns with STB 3.3 V power rails, and the 56-TSOP package is well established in legacy and current STB designs.
おすすめ
Industrial PLC / Controller Data Logging
Industrial PLCs, HMIs, and motor controllers use parallel NOR flash like the JS28F320J3F75A for parameter storage, fault logs, and recipe data that must survive power cycling. The 128 Kbyte uniform block size is efficient for storing fixed-size log records, and 100,000 P/E cycles per block supports years of continuous write activity. Industrial temperature rating (-40 C to +85 C) and high data retention (20 years) make it suitable for factory-floor environments.
おすすめ
Networking Router / Switch Firmware
Routers, switches, and wireless access points use parallel NOR flash for primary boot and recovery images because the deterministic access time is critical for fast power-on-to-forwarding-time. The JS28F320J3F75A's 75 ns access supports zero-wait-state reads at typical networking bus frequencies, and 32 Mbit fits a full routing-stack firmware with management agents. The top/bottom boot block options protect the bootloader region from accidental erase during field upgrades.
おすすめ
Printer Controller Firmware
Laser printers, multifunction devices, and industrial label printers store their main firmware, font tables, and user macros in parallel NOR flash because of fast random read access during page rendering. The JS28F320J3F75A's 4 MB capacity accommodates embedded fonts and PostScript interpreters, while 100,000 P/E cycles support firmware updates over the printer's lifetime. The 56-TSOP package integrates easily onto printer controller boards alongside DRAM and the print engine ASIC.
おすすめ
Automotive Infotainment / Cluster Storage
Head units, instrument clusters, and telematics modules historically used parallel NOR flash such as the JS28F320J3F75A to hold boot loaders, audio codecs, and navigation data. The 75 ns access time supports fast boot of critical displays, and the 32 Mbit capacity fits typical cluster software plus graphic assets. Although the standard part is industrial-grade (not AEC-Q100), it is widely used in cabin electronics where -40 C to +85 C is sufficient. For under-hood or powertrain applications, use AEC-Q100 qualified alternatives.
おすすめ
Medical Device Firmware / Parameter Storage
Patient monitors, infusion pumps, and diagnostic equipment require deterministic, reliable non-volatile storage for boot code, calibration tables, and audit logs. The JS28F320J3F75A's symmetric block architecture and long data retention (20 years) suit regulated medical designs where traceability of parameter storage is required. Parallel NOR allows XIP boot from the flash, minimizing RAM requirements and BOM cost in portable medical devices.
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: JS28F320J3F75A — 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 | JS28F320J3F75B | JS28F320J3F70A | JS28F320J3D75A | JS28F640J3F75A | JS28F320J3F75A (Alliance) | JS28F128J3F75A |
|---|---|---|---|---|---|---|---|
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Alliance Memory | Micron Technology |
| Package | 56-TSOP | 56-TSOP | 56-TSOP | 56-TSOP | 56-TSOP | 56-TSOP | 56-TSOP |
| Memory Size | 32 Mbit | 32 Mbit | 32 Mbit | 32 Mbit | 64 Mbit | 32 Mbit | 128 Mbit |
| Access Time | 75 ns | 75 ns | 70 ns | 75 ns | 75 ns | 75 ns | 75 ns |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Process Technology | 65 nm SBC | 65 nm SBC | 65 nm SBC | 130 nm SBC | 65 nm SBC | 65 nm SBC | 65 nm SBC |
| Boot Block Configuration | Top or Bottom | Top or Bottom | Top or Bottom | Top or Bottom | Top or Bottom | Top or Bottom | Top or Bottom |
| P/E Cycles | 100,000 | 100,000 | 100,000 | 100,000 | 100,000 | 100,000 | 100,000 |
| Data Retention | 20 years | 20 years | 20 years | 20 years | 20 years | 20 years | 20 years |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
主な差別化要因
- Wide distributor availability via Alliance Memory second source （vs JS28F320J3F75A (Micron original))
- 65 nm SBC process with low active current （vs JS28F320J3D75A (130 nm D revision))
- Cost-efficient 32 Mbit density in standard 56-TSOP （vs JS28F640J3F75A (64 Mbit))
設計ノート
JS28F320J3F75A requires a clean 3.3 V supply within 2.7 V - 3.6 V. Place a 0.1 uF ceramic decoupling capacitor close to each VCC and VCCQ pin, plus a bulk 4.7 uF tantalum or ceramic near the package. Hold RP# high during power-up ramp and for at least tPHQV (typically 150 us per Micron datasheet) before issuing the first read command. Failure to sequence RP# can leave the device in an undefined state.
Route the 56-TSOP address, data, and control traces with matched lengths to avoid bus skew. Keep CE#, OE#, and WE# traces short and route DQ0-DQ15 as a matched bus. The 56-TSOP Type I footprint has 0.5 mm pitch; use 0.2-0.3 mm trace width with clear reference to the GND plane. Place the flash as close as possible to the host MCU to minimize bus capacitance, and provide a solid VSS plane under the package for thermal dissipation and signal integrity.
Avoid toggling BYTE# while CE# is asserted - this can cause bus contention. After issuing a program or erase command, poll the Status Register (DQ7) or wait for STS to go low before accessing the array. Do not exceed the maximum program/erase cycles of 100,000 per block; implement wear-leveling in firmware for data logging use cases. When migrating designs to JS28F640J3F75A (64 Mbit), update your flash driver to use additional address bits and verify boot block configuration matches.
Parallel NOR flash buses are susceptible to reflections at high bus frequencies. For designs operating above 40 MHz, add 22-33 ohm series damping resistors near the MCU DQ outputs. Maintain VIL/VIH thresholds (VIL max 0.4 V, VIH min 2.4 V at 3.3 V) on all control signals. The CE# signal must use a clean edge - avoid RC delays that could violate tCE (chip enable access time). Use IBIS models from Micron for SI simulation.
コンプライアンス情報
Standard JS28F320J3F75A is industrial grade (-40C to +85C) and not AEC-Q100 qualified. RoHS and lead-free per Micron product page. For halogen-free status, contact Micron directly.
