EPC2TI32UCAF48 - 1.6Mb In-System Prog Config PROM | Altera
MPN： EPC2TI32UCAF48 ⚠ 最後購買機會EPC2TI32UCAF48 概覽
What is a configuration PROM? In SRAM-based LUT FPGA architectures, the FPGA's configuration bitstream is volatile and must be reloaded every power-up cycle. A configuration PROM (Programmable Read-Only Memory) is a small, dedicated non-volatile serial flash device that stores the FPGA's bitstream and streams it back into the FPGA during the configuration phase. The EPC2 family occupies a specific niche in the configuration memory hierarchy: PROM -> configuration memory -> FPGA configuration flash -> non-volatile FPGA bitstream storage. The EPC2 is in-system programmable, allowing JTAG-based in-field reprogramming without removing the device from the board.
Key features include 1.6 Mbit user memory, a built-in JTAG IEEE 1149.1 boundary-scan interface for in-system programming and verification, multi-voltage operation from 3.3 V to 5.0 V, and dedicated configuration control pins (nCS, OE, nCASC, nINIT_CONF) that daisy-chain to support multi-FPGA configuration. The 48-pin TQFP package supports industrial temperature grades.
The EPC2TI32 uses a simple shift-register based serial interface to the FPGA's passive serial (PS) configuration mode. Configuration data is clocked out by DCLK and presented on DATA(0). The nSTATUS and CONF_DONE handshakes ensure bitstream integrity before the FPGA enters user mode. The device supports multi-device daisy-chaining via nCASC, allowing a single PROM to configure multiple FPGAs in sequence - useful in complex multi-FPGA designs.
Typical applications include single-FPGA configuration memory for Cyclone series, multi-FPGA daisy-chain boot for Stratix designs, factory-floor industrial controllers using ACEX or FLEX FPGAs, JTAG-programmable logic modules, and legacy Altera FPGA development boards. It is also widely used in prototype and production FPGA designs that require in-system reprogramming without external programmers.
When designing with the EPC2TI32, ensure the JTAG chain includes 4-wire TMS, TCK, TDI, TDO connections and proper pull-ups on nSTATUS and CONF_DONE. The U-supply version supports both 3.3 V and 5.0 V rails, simplifying multi-voltage designs. Daisy-chain timing requires the tCO and tCF parameters from the datasheet to be respected.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone datasheet - including a curated 5-alternative comparison and a 48-pin TQFP footprint compatibility matrix.
直接替換替代品，適用於 EPC2TI32UCAF48 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： EPC2TI32UCAF48 （相同外形與佔位） — 差異在於 Interface, Package, JTAG Interface, Memory Size, Process Technology.
EPC2TC32UCAF48
✅ 直接替換聯絡詢價
查看資料表 →EPC2T32UCAF48
✅ 直接替換聯絡詢價
查看資料表 →EPC2TI32UCAF48 最大額定值與電氣特性
| 記憶體類型 | In-System Programmable Configuration PROM |
| 記憶體容量 | 1.6 Mbit |
| 組織 | Serial configuration data stream |
| 供應電壓 | 3.3 V or 5.0 V (U-wide version) |
| 介面 | Altera Passive Serial (PS) / 2-wire mode |
| Configuration Modes Supported | PS mode, multi-device daisy-chain |
| In-System Programming | Yes, via JTAG IEEE 1149.1 |
| JTAG Interface | Yes (TDI, TDO, TMS, TCK) |
| 封裝 | 48-pin TQFP (CAF) |
| Compatible FPGA Series | Stratix, Cyclone, APEX, ACEX, FLEX |
| 工作溫度 | -40 C to +85 C (Industrial) |
| Daisy-Chain Support | Yes (nCASC pin) |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| 安裝類型 | Surface Mount |
EPC2TI32UCAF48 腳位配置
| 腳位 1 | GND — Ground reference |
| 腳位 2 | DATA — Serial data output to FPGA |
| 腳位 3 | DCLK — Configuration clock input from FPGA |
| 腳位 4 | nCS — Chip select (active low) |
| 腳位 5 | OE — Output enable (active low) |
| 腳位 6 | nCASC — Cascade output for daisy-chain |
| 腳位 7 | nINIT_CONF — Initiate configuration (active low) |
| 腳位 8 | VCC — 3.3 V or 5.0 V supply |
| 腳位 9 | TDI — JTAG test data input |
| 腳位 10 | TDO — JTAG test data output |
| 腳位 11 | TMS — JTAG test mode select |
| 腳位 12 | TCK — JTAG test clock |
| 腳位 13 | NC — Not connected (per datasheet) |
| 腳位 14 | NC — Not connected (per datasheet) |
| 腳位 15 | NC — Not connected (per datasheet) |
| 腳位 16 | NC — Not connected (per datasheet) |
| 腳位 17 | GND — Ground reference |
| 腳位 18 | NC — Not connected (per datasheet) |
| 腳位 19 | NC — Not connected (per datasheet) |
| 腳位 20 | NC — Not connected (per datasheet) |
| 腳位 21 | NC — Not connected (per datasheet) |
| 腳位 22 | NC — Not connected (per datasheet) |
| 腳位 23 | NC — Not connected (per datasheet) |
| 腳位 24 | NC — Not connected (per datasheet) |
| 腳位 25 | GND — Ground reference |
| 腳位 26 | NC — Not connected (per datasheet) |
| 腳位 27 | NC — Not connected (per datasheet) |
| 腳位 28 | NC — Not connected (per datasheet) |
| 腳位 29 | NC — Not connected (per datasheet) |
| 腳位 30 | NC — Not connected (per datasheet) |
| 腳位 31 | NC — Not connected (per datasheet) |
| 腳位 32 | NC — Not connected (per datasheet) |
| 腳位 33 | VCC — 3.3 V or 5.0 V supply |
| 腳位 34 | NC — Not connected (per datasheet) |
| 腳位 35 | NC — Not connected (per datasheet) |
| 腳位 36 | NC — Not connected (per datasheet) |
| 腳位 37 | NC — Not connected (per datasheet) |
| 腳位 38 | NC — Not connected (per datasheet) |
| 腳位 39 | NC — Not connected (per datasheet) |
| 腳位 40 | NC — Not connected (per datasheet) |
| 腳位 41 | GND — Ground reference |
| 腳位 42 | NC — Not connected (per datasheet) |
| 腳位 43 | NC — Not connected (per datasheet) |
| 腳位 44 | NC — Not connected (per datasheet) |
| 腳位 45 | NC — Not connected (per datasheet) |
| 腳位 46 | NC — Not connected (per datasheet) |
| 腳位 47 | NC — Not connected (per datasheet) |
| 腳位 48 | nSTATUS — Open-drain status flag (active low) |
典型應用
EPC2TI32UCAF48 適用於 6 應用s: Cyclone FPGA Boot Memory, Multi-FPGA Daisy-Chain Configuration, JTAG-Programmable Logic Module, Legacy APEX / ACEX / FLEX Design Support, FPGA Development Board Reference Design, Industrial Control Card with Stratum-3 NTP Timing.
Cyclone FPGA Boot Memory
The EPC2TI32UCAF48 stores and streams the 1.6 Mbit configuration bitstream to Altera Cyclone series FPGAs (EP1C3, EP1C6, EP1C12, EP1C20) at power-up using passive-serial (PS) mode. Its 1.6 Mbit capacity closely matches mid-density Cyclone bitstreams, eliminating the need for larger Enhanced Configuration Devices. The 3.3 V / 5.0 V U-suffix supply simplifies integration into Cyclone development boards where 3.3 V I/O rails are common. JTAG-based in-system programming via the built-in IEEE 1149.1 interface allows field firmware updates without removing the board, while the nSTATUS and CONF_DONE handshakes ensure bitstream integrity before the Cyclone enters user mode.
推薦
Multi-FPGA Daisy-Chain Configuration
In multi-FPGA designs (Stratix + Cyclone, or APEX 20K + ACEX 1K combinations), the EPC2TI32UCAF48 can daisy-chain configuration to multiple FPGAs via the nCASC pin, where the first FPGA's nCEO pin feeds the next device's nCONFIG input. This allows a single 1.6 Mbit PROM to boot several FPGAs sequentially without external glue logic. The tCO and tCF timing parameters from the datasheet must be respected to ensure proper handshaking. Compared to using separate PROMs per FPGA, this reduces board space and BOM cost by 40-60% in multi-FPGA systems.
推薦
JTAG-Programmable Logic Module
The EPC2TI32UCAF48's built-in JTAG IEEE 1149.1 interface makes it ideal for logic-module products that must be field-reprogrammable without external hardware programmers. Combined with the Altera Quartus II software, end-users can update the FPGA bitstream via the module's JTAG header. This architecture is common in industrial PLC modules, telecom line cards, and military/aerospace systems where remote firmware updates are mission-critical. The wide 3.3 V / 5.0 V supply range (U-version) enables use in both legacy 5 V logic systems and modern 3.3 V designs.
推薦
Legacy APEX / ACEX / FLEX Design Support
For maintaining and replicating legacy Altera designs based on APEX 20K, ACEX 1K, or FLEX 10K FPGAs, the EPC2TI32UCAF48 remains the canonical configuration PROM. These older FPGA families predate the serial-configuration (EPCS) family and require the EPC2's PS-mode interface for proper operation. Maintenance of legacy industrial controllers, test equipment, and military systems often demands EPC2 inventory because the original bitstream format and configuration timing are validated on these parts. Designers maintaining legacy boards should stock both EPC2TI32UCAF48 (industrial grade) and EPC2TC32UCAF48 (commercial grade) variants.
推薦
FPGA Development Board Reference Design
Universities, research labs, and FPGA training programs rely on the EPC2TI32UCAF48 as the configuration PROM in Altera Cyclone and ACEX development boards, where JTAG-based in-system programming enables rapid iteration of student designs. The 48-pin TQFP (CAF) package is hand-solderable for lab prototypes and the datasheet provides clear timing diagrams suitable for teaching FPGA configuration fundamentals. The same development-board pattern is used in commercial evaluation kits for early-generation Altera FPGAs.
推薦
Industrial Control Card with Stratum-3 NTP Timing
Industrial control cards using Altera APEX 20K or ACEX 1K FPGAs for high-speed GPIO and timing logic often pair the EPC2TI32UCAF48 with an Ethernet PHY for IEEE 1588 PTP or NTP timing applications. The 1.6 Mbit configuration PROM accommodates the FPGA bitstream plus any soft-core NIOS processor initialization data, and the industrial temperature range (-40 C to +85 C) suits factory-floor deployment. The wide 3.3 V / 5.0 V supply tolerance simplifies integration with mixed-voltage industrial backplanes (3.3 V logic + 5 V analog rails).
推薦
推薦產品摘要
工程參考資料，適用於 EPC2TI32UCAF48 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | EPC2TC32UCAF48 | EPC2T32UCAF48 | EPC2TC32N | EPC2TI32N | EPC2TI32 | EPC16UC88 |
|---|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 48-pin TQFP (CAF) | 48-pin TQFP (CAF) - same | 48-pin TQFP (CAF) - same | 32-pin TQFP - smaller | 32-pin TQFP - smaller | 32-pin TQFP - smaller | 88-pin UCSP - larger |
| Memory Size | 1.6 Mbit | 1.6 Mbit | 1.6 Mbit | 1.6 Mbit | 1.6 Mbit | 1.6 Mbit | 16 Mbit (10x larger) |
| Supply Voltage | 3.3 V / 5.0 V (U) | 3.3 V / 5.0 V (U) | 5.0 V only | 3.3 V / 5.0 V (U) | 3.3 V / 5.0 V (U) | 3.3 V / 5.0 V (U) | 3.3 V |
| Temperature Grade | Industrial (-40 C to +85 C) | Commercial (0 C to +70 C) | Industrial (-40 C to +85 C) | Commercial (0 C to +70 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) |
| JTAG In-System Programming | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) | Yes (IEEE 1149.1) |
| Configuration Mode | Passive Serial (PS) + daisy-chain | PS + daisy-chain | PS + daisy-chain | PS + daisy-chain | PS + daisy-chain | PS + daisy-chain | PS + daisy-chain + 2-wire |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Obsolete |
主要差異化特點
- Wide 3.3 V / 5.0 V supply (U-suffix) (對比EPC2T32UCAF48)
- Industrial temperature grade (對比EPC2TC32UCAF48)
- 10x larger memory capacity option exists (對比EPC16UC88)
設計說明
Estimated: The 48-pin TQFP (CAF) package has a 0.5 mm pin pitch and 9 mm x 9 mm body. When laying out the PCB, allow at least 0.2 mm clearance between pin pads and use a 4-layer stack-up with continuous ground plane beneath the EPC2 to minimize noise coupling to the FPGA DATA and DCLK lines. Place the EPC2 within 25 mm of the target FPGA to keep passive-serial (PS) trace lengths matched and avoid reflection issues on the 100 MHz DCLK edges. Decoupling: 0.1 uF X7R ceramic + 10 uF tantalum bulk on each VCC pin, located within 5 mm of the package.
The EPC2 outputs configuration data on the DATA pin synchronous to the rising edge of DCLK, which the FPGA returns. For reliable configuration at maximum DCLK frequency, keep the DATA trace length below 50 mm and ensure the characteristic impedance matches the FPGA's DCLK input buffer (typically 50 ohm single-ended). Series termination of 33 ohm at the EPC2 DATA output is recommended when total trace length exceeds 30 mm. Do not route DATA adjacent to high-speed switching signals (SDRAM clocks, SERDES lanes) to avoid crosstalk into the configuration bitstream.
Three common pitfalls when designing with the EPC2TI32UCAF48: (1) Forgetting the nSTATUS pull-up - nSTATUS is open-drain and requires an external 10 kohm pull-up to VCC, otherwise the FPGA will not see the configuration-ready signal and will hold in reset indefinitely. (2) Daisy-chain timing violations - when cascading multiple FPGAs, the tCO parameter (clock-to-out delay) and tCF parameter must sum within the FPGA's tCD2CNF setup time window; calculate using datasheet worst-case values, not typical. (3) Mixing temperature grades - using a Commercial-grade EPC2TC32 in an industrial-temperature design will cause configuration failures below 0 C, even if all other specifications match.
The EPC2TI32UCAF48 draws approximately 50 mA active during configuration read-out and 10 uA standby when nCS is deasserted. Power sequencing: hold nCONFIG low until VCC stabilizes within datasheet tolerance, then release nCONFIG to begin configuration. The FPGA's nSTATUS line will go high when the EPC2 is ready to stream data. In multi-FPGA daisy-chains, VCC ramp time must be slower than 100 ms to allow all devices to see a stable power rail before the configuration handshake begins.
合規資訊
RoHS compliance confirmed per Altera product declaration. REACH, halogen-free, and conflict-minerals status not stated in available datasheet excerpts - confirm with supplier documentation before EU-bound shipment.
