Renesas R1EX25008ATA00I#S0

Overview

R1EX25008ATA00I#S0 from Renesas Electronics is an 8-kbit SPI serial EEPROM (1024 × 8-bit) in TSSOP-8 package, supporting 1.8–5.5 V supply, 3 MHz operation at 1.8 V, and 32-byte page write. It delivers 1,000k write cycles and 100-year data retention at 25°C, deployed in industrial control modules for nonvolatile parameter storage.

For engineers reviewing the R1EX25008ATA00I#S0 datasheet, R1EX25008ATA00I#S0 pinout, R1EX25008ATA00I#S0 application, or R1EX25008ATA00I#S0 equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware write protection via HOLD/W pins, 5 ms write cycle time, low 2.0 μA standby current, and −40°C to +85°C industrial temperature range.

Technical Context

This device implements a MONOS-based floating-gate memory array with integrated SPI interface logic, supporting full-duplex serial communication using separate D (input) and Q (output) lines. Its control logic enforces strict instruction sequencing-WREN must precede WRITE or WRSR-and monitors WIP bit status during self-timed operations.

The dual-voltage AC timing specification reflects distinct performance tiers: 5 MHz max clock frequency applies only above 2.5 V, while 1.8 V operation is limited to 3 MHz with relaxed setup/hold times (e.g., tSLCH ≥ 100 ns). Hardware protection is implemented through SRWD bit + W pin coupling, enabling irreversible Hardware Protected Mode when both are asserted.

Key Specifications

Pinout & Package

Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 3.0 mm × 4.4 mm body, 0.65 mm pitch, lead-free, tape-and-reel (3,000 units/reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with AT25080B-SSHL-T and M95080-DRMN6TP/K, R1EX25008ATA00I#S0 uniquely combines HOLD pin support, true hardware-protected mode (SRWD+W), MONOS-based 1,000k endurance, and guaranteed 3 MHz operation at 1.8 V-making it optimal for safety-critical or ultra-low-power industrial designs requiring robust, interruptible, and tamper-resistant configuration storage.

Availability

R1EX25008ATA00I#S0 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, smart energy meters, and automotive body control units requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R1EX25008ATA00I#S0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The R1EX25xxx Series targets cost-sensitive, high-reliability embedded systems needing SPI EEPROM with advanced data protection, low-voltage operation, and extended endurance-designed specifically for industrial automation and medical instrumentation.

FAQ

What is the maximum clock frequency supported by R1EX25008ATA00I#S0 at 1.8 V?

R1EX25008ATA00I#S0 supports a maximum clock frequency of 3 MHz when operated at 1.8 V supply voltage, as specified in the AC Characteristics table for VCC = 1.8–5.5 V. This is lower than its 5 MHz capability at 2.5–5.5 V, reflecting voltage-dependent timing margins. The device automatically complies with this limit-no software configuration is required to enforce it.

Does R1EX25008ATA00I#S0 support SPI mode 0 and mode 3 only?

Yes, R1EX25008ATA00I#S0 explicitly supports SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1), as stated in the Features section. It does not support mode 1 or mode 2. Data is latched on the rising edge of C (for D input) and output changes on the falling edge of C (for Q output), consistent with these two modes.

How does the HOLD function operate in R1EX25008ATA00I#S0?

In R1EX25008ATA00I#S0, the HOLD pin pauses ongoing SPI communication without deselecting the device: when asserted (low) while S is low and C is low, Q goes high-impedance and D/C become don't-care. Communication resumes upon deassertion (high) under the same clock condition. This enables safe interruption of reads/writes during MCU interrupts without losing state.

What write protection mechanisms are implemented in R1EX25008ATA00I#S0?

R1EX25008ATA00I#S0 implements two layered protections: (1) Software-Protected Mode (SPM) using BP1/BP0 bits to define protected memory blocks (none, upper quarter, upper half, or full array); and (2) Hardware-Protected Mode (HPM), activated when SRWD = 1 and W = low, which locks BP1/BP0/SRWD bits permanently until W is pulled high. Both are enforced by internal logic independent of host software.

Is R1EX25008ATA00I#S0 compatible with standard 8-pin TSSOP footprints?

Yes, R1EX25008ATA00I#S0 uses the PTSP0008JC-B (TTP-8DAV) package, a standard 8-pin TSSOP with 0.65 mm pitch, 3.0 mm × 4.4 mm body, and JEITA code JEP-95. It is mechanically and solder-reflow compatible with industry-standard TSSOP-8 land patterns, including IPC-7351B nominal footprint for TTP-8DAV.