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EPCQ16ASI8N

16Mb FPGA config Flash, AS x1/x4, ISP, 100MHz, SOIC-8, Intel/Altera

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Manufacturer Part：

EPCQ16ASI8N

Package：

SOIC-8 / SI-8 (4.90 x 3.90 x 1.50mm, 1.27mm pitch, 150mil body)

Description

Product Overview

The EPCQ16ASI8N from Intel/Altera is a 16Mb serial configuration device for FPGA programming in an 8-pin SOIC package. Operating from 2.7-3.6V, it supports Active Serial (AS) x1 and x4 configuration modes for Intel FPGAs with in-system programming (ISP) capability.

Key Specifications

Memory Density	16 Mbit (2 MB)
Memory Type	Non-volatile Flash
Operating Voltage	2.7V to 3.6V
Max Clock Frequency	100 MHz
Configuration Modes	AS x1, AS x4 (Active Serial)
ISP Support	Yes (via JTAG through FPGA)
Erase/Program Cycles	>100,000 cycles
Data Retention	>20 years
Sector Organization	64KB sectors, 4KB/32KB subsectors
Quad Read Support	Yes (extended quad input fast read)
Dual Read Support	Yes (extended dual input fast read)
Operating Temperature	-40 to +85°C (I suffix)
Package	SOIC-8 (3.9mm width, SI suffix)

Features

16Mb serial Flash for Intel FPGA configuration
Active Serial (AS) x1 and x4 modes
2.7-3.6V single supply operation
In-system programming (ISP) via JTAG
Reprogrammable >100,000 erase/program cycles
Fast read, dual input fast read, quad input fast read
Write protection via status register bits
4KB, 32KB, 64KB erase granularity
Low-cost, low-pin-count configuration solution
20-year data retention minimum

Applications

Intel Cyclone/Arria FPGA configuration storage
Industrial control FPGA boot Flash
Communication equipment FPGA programming
Automotive ECU FPGA configuration

Product Introduction:EPCQ16ASI8N Product Introduction

The EPCQ16ASI8N from Intel/Altera is a 16Mb serial configuration device for FPGA programming in SOIC-8. Supports Active Serial (AS) x1 and AS x4 configuration modes for Intel Cyclone and Arria FPGAs. 2.7-3.6V operation at up to 100MHz clock. ISP via JTAG through the FPGA. >100K erase cycles with >20 year retention. A suffix denotes 64KB sectors, S suffix denotes standard security, I suffix denotes -40 to 85°C industrial temperature, 8 suffix denotes pin config option 8 (RESET# and HOLD#), N suffix denotes SOIC-8 package. Ideal for Intel FPGA configuration storage.

Working Principle:EPCQ16ASI8N Working Principle

The EPCQ16A stores the FPGA configuration bitstream in non-volatile Flash memory. During power-up, the Intel FPGA initiates configuration by driving the AS interface — the FPGA acts as the master, providing clock (DCLK) and reading data from the EPCQ. In AS x1 mode, 1 bit per clock is read; in AS x4 mode, 4 bits per clock are read for 4x faster configuration. The EPCQ also supports ISP: the FPGA can reprogram the EPCQ through the JTAG interface using Intel’s Quartus Programmer software. The write-protection feature uses status register bits (BP[3:0] and TB) to define protected sectors, preventing accidental corruption of critical configuration data. The 4KB subsector erase allows efficient partial updates without erasing the entire device.

Pin Description:EPCQ16ASI8N Pin Definition and Functions

Pin	Name	Type	Function
1	S# (Chip Select)	Input	Chip select (active low, from FPGA nCSO)
2	DATA[1]	I/O	Serial data output / DATA1 in quad mode
3	DATA[2]	I/O	DATA2 in quad mode / HOLD# function
4	VSS (Ground)	Ground	Ground
5	DATA[0]	I/O	Serial data input/output / DATA0 in quad mode
6	DCLK	Input	Serial clock (from FPGA)
7	DATA[3]	I/O	DATA3 in quad mode / RESET# function
8	VCC (Supply)	Power	Supply voltage (2.7-3.6V)

Application Scenarios:In which products and applications isEPCQ16ASI8N used

Cyclone V FPGA AS x4 configuration with 16Mb EPCQ at 100MHz
Industrial Cyclone 10 LP FPGA boot storage with ISP update
Arria 10 GX partial reconfiguration data storage
Automotive Cyclone V SoC FPGA configuration with write protection

Alternative Models:What chips are recommended as replacements for EPCQ16ASI8N

Manufacturer	Part Number	Package	Notes
Intel/Altera	EPCQ32ASI8N	SOIC-8	32Mb, pin-compatible density upgrade
Intel/Altera	EPCQ16ASI8	SOIC-8	Same device, tube packaging
Micron	MT25QL128ABA1EW7-0SIT	W-PDFN-8	128Mb SPI NOR Flash (generic alternative)