Asahi Kasei Microdevices/AKM AK6510CL

Overview

AK6510CL from Asahi Kasei is a 32Kbit (4096 × 8) SPI serial CMOS EEPROM in an 8-pin SONW package, operating from 1.8V to 5.5V with 0.8µA standby current and 5ms max self-timed write cycle. It supports page write (32-byte), block write protection (1/4, 1/2, or full array), and dual write protection via software (WPEN bit) and hardware (WP pin). It is used for configuration storage in industrial controllers and embedded sensor nodes.

For engineers reviewing the AK6510CL datasheet, AK6510CL pinout, AK6510CL application, or AK6510CL equivalent, key selection criteria include its 1.8V–5.5V supply range, SONW thermal performance, HOLD pin support for multi-master SPI arbitration, and verified 1,000,000-cycle endurance at 25°C.

Technical Context

The AK6510CL implements a standard SPI slave interface with MSB-first data transfer, requiring CS low-to-high edge to latch instructions and initiate internal programming. Its instruction set includes READ, WRITE, WREN, WRDI, RDSR, and WRSR - all encoded as 8-bit op-codes followed by 16-bit address and 8-bit data fields.

It features a status register with RDY (busy flag), WEN (write enable state), BP0/BP1 (block protect bits), and WPEN (write protect enable), all programmable via WRSR. Block protection applies to fixed memory regions (e.g., C00h–FFFh for AK6510CL), and WP pin behavior is conditional on WPEN bit state.

Key Specifications

Pinout & Package

AK6510CL uses an 8-pin Plastic SONW (Small Outline No-Lead) package, measuring 3.0mm × 3.0mm × 0.8mm, optimized for space-constrained PCBs and improved thermal dissipation vs. SSOP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC320A-I/SN and M95320-DFMN6TP, the AK6510CL uniquely combines 1.8V operation, SONW packaging, HOLD functionality, and dual (software + hardware) write protection - making it optimal for space-constrained, low-power, and security-sensitive embedded systems.

Availability

AK6510CL is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AK6510CL 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

Asahi Kasei is a Japanese semiconductor manufacturer specializing in analog, mixed-signal, and non-volatile memory ICs for industrial, automotive, and medical applications.

The AK6510C/12C product line delivers cost-effective, high-reliability SPI EEPROMs targeting low-density data storage where robustness, wide voltage operation, and small footprint are critical design constraints.

FAQ

What is the maximum SPI clock frequency supported by the AK6510CL across its full voltage range?

The AK6510CL supports up to 5MHz at VCC ≥ 4.5V, 2.5MHz at 2.5V ≤ VCC < 4.5V, and 1.0MHz at 1.8V ≤ VCC < 2.5V. These limits ensure reliable setup/hold timing per AC specifications - exceeding them risks data corruption during READ or WRITE sequences. The AK6510CL's timing margins are validated across -40°C to +85°C.

How does the HOLD pin function during an active AK6510CL write operation?

The HOLD pin cannot pause an internal programming cycle once initiated; it only suspends SPI data transfer before or after the CS high-to-low transition that triggers write execution. During active write (RDY = 1), HOLD has no effect - the AK6510CL ignores HOLD transitions until the self-timed 5ms cycle completes and RDY returns to 0.

Can the AK6510CL's block write protection be overridden by asserting WREN without regard to BP bits?

No. Even with WREN executed and WEN = 1, the AK6510CL rejects WRITE instructions targeting addresses within protected blocks (e.g., C00h–FFFh when BP1/BP0 = 10). The block protection logic gates the write enable signal - no software workaround exists. Protection is enforced at the memory decoder level, independent of status register state.

What happens to the AK6510CL's SO pin when CS is high and HOLD is asserted simultaneously?

When CS is high, the AK6510CL forces SO into Hi-Z regardless of HOLD state. HOLD only affects SO behavior during active transfers (CS low); its assertion while CS high has no electrical impact. This ensures clean bus release for multi-slave SPI configurations, preventing contention even if HOLD remains active between transactions.

Is the AK6510CL's 1,000,000-cycle endurance rating guaranteed per memory address or per device?

The endurance rating is specified per address - meaning each of the 4096 bytes in the AK6510CL can endure 1,000,000 write/erase cycles independently. This is confirmed in the datasheet's "Endurance" specification ("1000K E/W cycles / Address"). Wear leveling must be implemented in firmware if uniform usage across all addresses is required.