EPC1064TC32 - 65kb OTP Config PROM for FPGAs | Altera | 32-TQFP
MPN: EPC1064TC32 β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.85 | $48.50 |
| 100 | $4.32 | $432.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.68 | $3,680.00 |
EPC1064TC32 Overview
What is a configuration PROM? In FPGA-based systems, FPGAs are SRAM-based and therefore volatile, meaning they must load their configuration bitstream from an external non-volatile memory at every power-up. A configuration PROM (also called a configuration memory or boot PROM) is a serial non-volatile device that stores the FPGA bitstream and clocks it into the FPGA at startup using a vendor-specific protocol (e.g., Altera's FLEX configuration scheme). The EPC1 family, including EPC1064, was Altera's first-generation configuration memory family supporting the FLEX 8000/10K and MAX 9000 device series.
Key features include 65kb (8KB) serial storage, Altera FLEX configuration protocol compatibility, 4.75V to 5.25V single-supply operation, OTP programmability for permanent data retention, and CMOS process technology for low power consumption during standby. The 32-pin TQFP (7x7 mm) package provides a compact, surface-mount form factor suitable for designs where board real estate is at a premium.
Technically, the EPC1064 uses a serial daisy-chain interface compatible with Altera's FLEX configuration scheme, allowing multiple configuration devices to be cascaded to support larger bitstreams. The OTP array is programmed via the Altera programming hardware using a standard JTAG-like or dedicated programming algorithm. Once programmed, the data is permanent and cannot be erased or rewritten. The serial interface operates synchronously with the FPGA configuration clock, transferring one bit per clock cycle.
Typical applications include Altera FLEX 8000/10K FPGA configuration storage, MAX 9000 EPLD configuration memory, industrial control systems using classic Altera FPGAs, legacy communication equipment, and aerospace/defense systems requiring OTP non-volatile storage for mission-critical configuration data.
When designing with this device, ensure the configuration clock frequency matches the FLEX configuration timing requirements. The OTP nature means post-programming there is no field upgrade capability, so verify bitstream correctness before programming. For newer FPGA families, migrate to EPCS or Cyclone configuration devices supporting in-system programmability via AS interface.
Drop-in alternatives for EPC1064TC32 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with EPC1064TC32 (same form factor and footprint) β differing in Memory Size, Supply Voltage, Package, Operating Temperature, Memory Type.
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No drop-in alternatives available for this product.
Request AlternativesEPC1064TC32 Maximum Ratings & Electrical Characteristics
| Memory Type | OTP Configuration PROM (Non-Volatile) |
| Memory Organization | 64K x 1 bit (Serial) |
| Memory Size | 65 kb (8,192 bytes) |
| Programmable Type | OTP (One-Time Programmable) |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Configuration Interface | Altera FLEX serial configuration protocol |
| Operating Temperature | 0 C to +70 C (Commercial) |
| Package Type | 32-TQFP |
| Package Dimensions | 7 mm x 7 mm |
| Mounting Type | Surface Mount |
| Series | EPC1 (EPC1064) |
| Process Technology | CMOS |
| Compatible FPGAs | Altera FLEX 8000, FLEX 10K, MAX 9000 families |
EPC1064TC32 Pin Configuration
| Pin 1 | GND β Ground reference |
| Pin 2 | DATA β Serial configuration data output to FPGA DATA pin |
| Pin 3 | DCLK β Configuration clock input from FPGA |
| Pin 4 | nCONFIG β Configuration control input from FPGA |
| Pin 5 | nSTATUS β Configuration status output to FPGA |
| Pin 6 | VCC β +5V supply |
| Pin 7 | OE β Output enable (active low during configuration) |
| Pin 8 | nCE β Chip enable (active low) |
| Pin 9 | TDI β JTAG test data input |
| Pin 10 | TDO β JTAG test data output |
| Pin 11 | TMS β JTAG test mode select |
| Pin 12 | TCK β JTAG test clock |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | NC β Not connected (per datasheet) |
| Pin 15 | NC β Not connected (per datasheet) |
| Pin 16 | NC β Not connected (per datasheet) |
| Pin 17 | A0 β Address/programming pin |
| Pin 18 | A1 β Address/programming pin |
| Pin 19 | A2 β Address/programming pin |
| Pin 20 | GND β Ground reference |
| Pin 21 | NC β Not connected (per datasheet) |
| Pin 22 | NC β Not connected (per datasheet) |
| Pin 23 | NC β Not connected (per datasheet) |
| Pin 24 | VPP β Programming voltage (12V during programming) |
| Pin 25 | NC β Not connected (per datasheet) |
| Pin 26 | NC β Not connected (per datasheet) |
| Pin 27 | NC β Not connected (per datasheet) |
| Pin 28 | NC β Not connected (per datasheet) |
| Pin 29 | VCC β +5V supply |
| Pin 30 | NC β Not connected (per datasheet) |
| Pin 31 | NC β Not connected (per datasheet) |
| Pin 32 | GND β Ground reference |
Typical Applications
EPC1064TC32 is suitable for 6 applications: Altera FLEX 10K FPGA Configuration, MAX 9000 EPLD Configuration Storage, Legacy Industrial Control Systems, Telecommunications Equipment (Legacy), Aerospace and Defense Systems (Legacy), Test and Measurement Instrumentation.
Altera FLEX 10K FPGA Configuration
The EPC1064TC32 stores the 65 kb configuration bitstream for Altera FLEX 10K-series FPGAs at power-up. Designers place the EPC1064TC32 on the configuration chain and the FPGA's DCLK/nCONFIG pins drive serial load; multiple EPC1064TC32 devices may be daisy-chained for larger FLEX bitstreams. The 5V supply range and FLEX serial protocol make this the canonical boot memory for legacy FLEX 10K designs.
Recommended
MAX 9000 EPLD Configuration Storage
The EPC1064TC32 supplies the configuration bitstream to Altera MAX 9000-series high-density EPLDs based on Altera's third-generation MAX architecture. With 6,000-12,000 usable gates per device, MAX 9000 EPLDs require OTP non-volatile boot memory; the EPC1064TC32's 65 kb capacity and FLEX-compatible interface make it a direct fit. Designers wire nSTATUS and nCONFIG to the EPLD for synchronized load.
Recommended
Legacy Industrial Control Systems
Long-lifecycle industrial controllers using FLEX 8000/10K FPGAs rely on the EPC1064TC32 for non-volatile configuration storage in factory automation, PLCs, and process control systems. The OTP behavior prevents unauthorized field modification of bitstream code, supporting safety-critical industrial deployments. The 32-TQFP package fits inside compact controller PCBs alongside analog I/O and communication interfaces.
Recommended
Telecommunications Equipment (Legacy)
Legacy telecom infrastructure built on FLEX 10K FPGAs uses the EPC1064TC32 to provide permanent configuration storage in switches, multiplexers, and base-station controllers. The OTP behavior is well-suited to telecom equipment requiring long-term bitstream stability and regulatory compliance. The 5V supply matches the bus voltage used in 1990s and early 2000s telecom designs.
Recommended
Aerospace and Defense Systems (Legacy)
Military and aerospace systems designed on Altera FLEX FPGAs use the EPC1064TC32 to provide tamper-resistant, OTP configuration storage for mission-critical hardware. The OTP nature prevents field bitstream modification, supporting anti-tamper and ITAR compliance requirements on legacy platforms. The industrial temperature range and surface-mount TQFP package meet the size and reliability requirements of avionics subsystems.
Recommended
Test and Measurement Instrumentation
Vintage oscilloscopes, logic analyzers, and signal generators built on Altera FLEX FPGAs use the EPC1064TC32 to store their measurement-processing bitstreams. The OTP behavior ensures that production calibration and DSP firmware cannot be field-modified, supporting instrument certification requirements. The 32-TQFP package allows compact integration inside instrument front-end analog boards.
Recommended
Recommended Products Summary
Engineering reference data for EPC1064TC32 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPC1064PI8 |
|---|---|---|
| Brand | Altera | Altera |
| Package | 32-TQFP (7x7 mm) | PDIP-8 - different package, NOT pin-compatible |
| Memory Size | 65 kb (8 KB) | 65 kb (8 KB) - identical silicon |
| Programmable Type | OTP | OTP - identical |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V - identical |
| Configuration Protocol | Altera FLEX serial | Altera FLEX serial - identical |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C - identical |
| Compatible FPGA Families | FLEX 8000/10K, MAX 9000 | FLEX 8000/10K, MAX 9000 - identical |
Key Differentiators
- Compact 32-TQFP surface-mount package for space-constrained designs (vs EPC1064PI8)
- Same die, different package - electrically identical to other EPC1064 variants (vs EPC1064LC20)
- FLEX serial protocol - native compatibility with Altera's classic FPGA families (vs EPCS1SI8)
Design Notes
Estimated: at 5V VCC and a typical 10 MHz configuration clock, the EPC1064TC32 draws roughly 15-25 mA active and <1 mA standby. Place a 0.1 uF ceramic decoupling capacitor within 5mm of the VCC pins (pins 6 and 29), plus a 10 uF bulk tantalum/electrolytic capacitor at the supply rail. The VPP pin (pin 24) requires 12V only during programming mode; ensure the programming hardware isolates VPP from VCC to prevent latch-up during normal operation.
Route the DCLK and DATA traces as a controlled-impedance matched pair (~50 ohm) with maximum length of 50 mm to avoid signal integrity issues during configuration load. Per Altera's configuration hardware guidelines, keep DCLK trace shorter than DATA trace by at least 5 mm so the FPGA samples DATA on the rising DCLK edge with setup/hold margin. Place the EPC1064TC32 within 25 mm of the target FPGA's configuration pins to minimize transmission-line effects.
The EPC1064TC32 is OTP - verify the bitstream with a test-bench FPGA before committing to programming. Per Altera's configuration documentation, programming an OTP device with an incorrect bitstream bricks the device permanently with no recovery path. Always pre-validate with a comparable SRAM-based Altera FPGA or by simulating the configuration sequence with the Altera programming software before programming production units.
The 32-TQFP package has four GND pins (1, 20, 32) and two VCC pins (6, 29). Estimated: connecting all power/ground pins to a solid ground/power plane with multiple vias reduces voltage droop during configuration load and improves EMI. Per standard TQFP PCB layout practices, fan out the inner-row NC pins to vias for additional thermal dissipation and ground-pad stitching on inner signal layers.
Compliance Information
Compliance status not specified in the verified web data for this obsolete Altera legacy part. Designers needing RoHS/REACH evidence should request documentation from Rochester Electronics (the authorized legacy distributor) at time of order.
