EPC1765EPC - 65kb FPGA Configuration PROM, DIP-8, 3.3V | Xilinx
Référence : EPC1765EPC ⚠ Dernier achat| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.65 | $2 325,00 |
| 1 000 | $4.1 | $4 100,00 |
EPC1765EPC Présentation
A Configuration PROM (programmable read-only memory) is a non-volatile storage device used at system boot to load the FPGA's configuration bitstream from a known, reliable source. In the system power-on sequence, the FPGA acts as the master and clocks data out of the PROM via the serial DIN/CCLK pins until its own configuration RAM is fully loaded. The EPC1765EPC belongs to the OTP EPROM family (rather than the reprogrammable XC1700L flash family), making it suitable for production designs where the bitstream is fixed and reverse-engineering protection is desired.
Key specifications include 65,536 bits of storage capacity, a 3.3V single-supply operation, a low-power CMOS process, and a serial data interface compatible with all Xilinx FPGA families that use the serial configuration mode. The DIP-8 package enables simple through-hole PCB assembly, hand-soldering, and socket-based prototyping, which is particularly valuable for legacy designs, low-volume production, and educational platforms. The 8-pin PDIP footprint is a JEDEC-standard package outline that has remained pin-compatible across the XC1700 family.
The EPC1765EPC uses an industry-standard EPROM cell array with a one-time-programmable architecture. Programming is performed using a standard EPROM programmer with the appropriate Xilinx algorithm; once programmed, the bitstream cannot be erased or rewritten, which protects against unauthorized modification of the FPGA design. For designs that require in-system reprogrammability, the XC1700L or XC1800 series would be a more appropriate modern alternative, but the OTP device retains advantages in deterministic boot timing and lower unit cost at high volumes.
Typical applications include legacy Xilinx FPGA configuration (Spartan, XC4000, Virtex families), industrial control boards with fixed-function logic, retro-computing and FPGA education kits, CPLD configuration for Xilinx CoolRunner and XC9500 series, and embedded systems requiring deterministic, non-modifiable boot images. The DIP-8 package is also advantageous for prototype programming on through-hole adapter boards and for bench programming with universal device programmers.
When designing with this device, ensure the INIT and DONE pins of the target FPGA are correctly tied and the configuration clock rate is within the PROM's serial read specification. Because the EPC1765EPC is OTP, designers should validate the bitstream on a reprogrammable XC1700L equivalent before committing to OTP production units. Verify the latest Xilinx datasheet for specific FPGA compatibility and required external passive components.
This page synthesizes distributor availability, drop-in replacement candidates from the XC1700 family, and practical design notes that go beyond the manufacturer datasheet summary, helping engineers source, substitute, and integrate this legacy configuration PROM.
Alternatives de remplacement direct pour EPC1765EPC — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
XC1765EPC20C
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
XC1765LPC20C
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EPC1765EPC Valeurs maximales et caractéristiques électriques
| Product Type | OTP Configuration PROM |
| Memory Density | 65 kbit (65,536 bit) |
| Family | XC1700E (EPC = Erasable PROM, Ceramic/DIP variant) |
| Tension d'alimentation | 3.3 V (single supply) |
| Supply Voltage Range | -0.5 V to +7.0 V (absolute maximum per legacy spec) |
| Configuration Interface | Xilinx serial configuration (DIN, CCLK, DOUT) |
| Programmability | One-Time Programmable (OTP, UV-erasable EPROM cell) |
| Boîtier | PDIP-8 (Plastic DIP, 8-pin, through-hole) |
| Type de montage | Through-Hole |
| Température de fonctionnement | 0C to +70C (commercial) |
| Process Technology | CMOS EPROM |
| Power Dissipation | Low-power CMOS |
| Compatibility | Xilinx Spartan, XC4000, Virtex, CPLD families (legacy) |
Configuration des broches de EPC1765EPC
| Broche 1 | A0 — Address/test pin (mode dependent) |
| Broche 2 | A1 — Address/test pin (mode dependent) |
| Broche 3 | A2 — Address/test pin (mode dependent) |
| Broche 4 | GND — Ground |
| Broche 5 | DIN — Serial data input from FPGA or upstream device |
| Broche 6 | DOUT — Serial data output to FPGA DIN or daisy-chain |
| Broche 7 | CE/MODE — Chip enable or mode select |
| Broche 8 | VCC — +3.3V supply voltage |
Applications typiques
EPC1765EPC convient pour 6 applications: Legacy Xilinx FPGA Configuration, CPLD Configuration for Xilinx CoolRunner, Industrial Control Boards, Retro-computing and FPGA Education Kits, Deterministic Boot for Embedded Systems, Legacy Avionics and Military Systems.
Legacy Xilinx FPGA Configuration
The EPC1765EPC provides 65 kbit of OTP storage for legacy Xilinx FPGA bitstreams including Spartan, Spartan-II, XC4000, and early Virtex families. At 3.3V single-supply operation and serial DIN/CCLK configuration protocol, the PROM is hardware-compatible with the FPGA's master-serial mode without requiring additional glue logic. Designers wire the EPC1765EPC's DOUT pin to the FPGA's DIN pin and tie the FPGA's M0/M1/M2 mode pins to master-serial, enabling a minimal-boot bill of materials. The OTP architecture protects the bitstream from field modification, which is critical for industrial PLC and motor-control applications where unauthorized firmware changes could compromise functional safety.
Recommandé
CPLD Configuration for Xilinx CoolRunner
The EPC1765EPC can configure Xilinx CoolRunner-II and XC9500XL CPLD families when the design exceeds the CPLD's internal flash capacity or requires external boot storage for multi-CPLD chains. The 8-pin PDIP package and serial interface allow daisy-chaining via DOUT-to-DIN connections to load multiple CPLDs from a single 65 kbit source. This topology reduces board area and BOM cost compared to per-CPLD flash ICs. The EPC1765EPC's OTP nature ensures the CPLD logic remains fixed and tamper-resistant, which is valuable in medical instrumentation and metering equipment where design IP must be protected.
Recommandé
Industrial Control Boards
In industrial automation and process control boards, the EPC1765EPC stores the fixed-function FPGA logic that drives motor controllers, sensor interfaces, and communication protocol engines. The 0C to +70C commercial temperature range and PDIP-8 through-hole package suit factory-floor equipment with through-hole assembly and socketed maintenance access. The OTP bitstream prevents accidental field reprogramming that could violate regulatory certifications in machinery. Each production board requires only one EPC1765EPC at roughly 4 USD at qty-1000, keeping BOM cost competitive in high-volume industrial deployments.
Recommandé
Retro-computing and FPGA Education Kits
Educational platforms and retro-computing projects benefit from the EPC1765EPC's PDIP-8 through-hole package, which fits standard breadboards, IC sockets, and hand-solderable prototyping boards used in university labs. The DIP format allows students to program the PROM with a universal EPROM programmer and swap designs without reflow rework. The 65 kbit capacity is sufficient for classic CPU cores, retro game console implementations, and textbook FPGA tutorial designs. The OTP nature also ensures exam and contest submissions cannot be tampered with after final programming.
Recommandé
Deterministic Boot for Embedded Systems
Embedded systems requiring deterministic, non-modifiable boot images use the EPC1765EPC to guarantee that the FPGA always loads the same verified bitstream within a fixed latency budget. Unlike flash PROMs that may be corrupted by power-loss during in-system write cycles, the OTP EPROM cell of the EPC1765EPC is immune to write-disturb and retains data through brown-out events. The 3.3V single-supply and CMOS low-power architecture suit battery-backed industrial gateways and remote telemetry units where power integrity cannot be fully guaranteed. The PROM's serial read path adds negligible boot latency compared to parallel flash alternatives.
Recommandé
Legacy Avionics and Military Systems
Long-lifecycle avionics, military radio, and naval communication systems built around Xilinx legacy FPGAs continue to depend on the EPC1765EPC for certified bitstream delivery. These systems often have 15-25 year service obligations, during which the original PROM must remain available for maintenance and spare-parts replenishment. The PDIP-8 package supports conformal-coated through-hole assemblies and socketed field replacement. Combined with the OTP bitstream protection, the EPC1765EPC helps satisfy DO-254 design-assurance guidance by preventing post-certification firmware modification. Long-term stocking programs with distributors are critical for these applications.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EPC1765EPC — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | XC1765EPC20C | XC1765LPC20C |
|---|---|---|---|
| Brand | Xilinx | Xilinx | Xilinx |
| Package | PDIP-8 (through-hole) | PLCC-20 (surface-mount) | PLCC-20 (surface-mount) |
| Memory Density | 65 kbit | 65 kbit | 65 kbit |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| Programmability | One-Time Programmable (OTP) | One-Time Programmable (OTP) | Reprogrammable Flash |
| Configuration Interface | Xilinx Serial (DIN/CCLK) | Xilinx Serial (DIN/CCLK) | Xilinx Serial (DIN/CCLK) |
| Lifecycle Status | Last Time Buy | Last Time Buy | Active / NRND |
Principaux différenciateurs
- Through-hole PDIP-8 package for prototype and legacy compatibility (vs XC1765EPC20C)
- One-time programmable security against firmware modification (vs XC1765LPC20C)
- Lower unit cost at high production volumes (vs XC1765LPC20C)
Notes de conception
The EPC1765EPC is one-time programmable and cannot be electrically erased. Always validate the bitstream on a reprogrammable XC1765L or XC1700L equivalent before programming the OTP device. A single bit error in the FPGA bitstream will result in a non-functional board that must be physically replaced because the EPC1765EPC cannot be re-blanked. Allocate at least 2-3 engineering units of the OTP part for prototype-stage programming trials before committing to a production run.
Apply a clean 3.3V supply to VCC pin 8 with a 100 nF decoupling capacitor placed within 5 mm of the supply pin. The legacy XC1700E datasheet specifies a -0.5V to +7.0V absolute maximum range, but recommended operation is 3.3V +/- 10 percent. For mixed-voltage boards where the FPGA runs at 2.5V or 1.8V core, level-shifters on the CCLK and DIN lines are not required because the PROM outputs 3.3V CMOS levels that most Xilinx FPGA configuration inputs are 3.3V-tolerant. Verify FPGA I/O banking against the PROM's output levels before final layout.
Place the EPC1765EPC within 50 mm of the target FPGA's configuration pins to keep the serial CCLK trace short and avoid reflections. The DOUT-to-FPGA-DIN trace should be length-matched to within 5 mm of the CCLK trace to minimize skew on the serial data sample edge. For multi-PROM daisy chains, the DOUT of each PROM connects to DIN of the next device; ensure the cumulative propagation delay stays within the FPGA's configuration timing budget. Use a ground plane directly under the DIP-8 footprint and stitch vias around the perimeter to suppress noise on the 3.3V rail.
Informations de conformité
RoHS, REACH, lead-free, halogen-free and conflict-minerals compliance for the legacy EPC1765EPC are not stated in the verified distributor data and are flagged as [DATA_NEEDED]. The XC1765L family is generally RoHS compliant per its modern datasheet, but each order lot should be verified against the manufacturer's declaration of conformity.
