DS2430AP+ - 256-Bit 1-Wire EEPROM, 6-TSOC | Analog Devices
MPN: DS2430AP+ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.84 | $184.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.37 | $1,370.00 |
DS2430AP+ Overview
A 1-Wire EEPROM is a serial non-volatile memory that combines data storage, unique device identification, and power delivery on a single conductor. The DS2430AP+ belongs to the broader category of serial EEPROMs (EEPROM -> non-volatile memory -> memory IC -> semiconductor) and is widely used for board identification, calibration constants, and consumable authentication in embedded systems. Because the protocol also carries parasitic power, designers can mount the part on a PCB with only two pads (data + ground), which dramatically simplifies wiring.
Key features include a factory-lasered 64-bit registration number (unique 48-bit serial number, 8-bit CRC, 8-bit family code 14h), 32 x 8-bit user-programmable EEPROM, an additional 64-bit OTP area for permanent write protection, and an on-chip 8-bit CRC generator. The EEPROM cells are rated for a minimum of 100,000 write cycles and 10 years of data retention at +85 °C. The device supports both parasitic-power mode (power harvested from the data line) and external-supply mode for write-heavy applications.
The DS2430A family uses a strict master-slave timing protocol. Every bit transaction begins with the master pulling the line low for 15 µs; the slave samples in the middle of the slot. A strong pull-up (typically 2.2 kΩ–4.7 kΩ idle, switched to a few hundred ohms during EEPROM writes) is required in parasitic-power mode to supply the programming current. The on-chip CRC and unique 64-bit ROM ID allow multiple DS2430A devices to coexist on a single bus with guaranteed addressing.
Typical applications include PCB identification and asset tracking, printer and consumable cartridge authentication, medical-device calibration storage, industrial sensor calibration constants, battery-pack telemetry tags, and accessory authentication for handheld instruments. Its single-wire interface is ideal when board space, connector pin count, or wiring harness complexity is constrained.
When designing with the DS2430AP+, follow the manufacturer's 1-Wire timing guidelines, place the pull-up resistor close to the host pin, and use a strong pull-up during EEPROM write cycles in parasitic mode. Decoupling the data line with a small capacitor can improve noise immunity in long-cable applications. The "+" suffix indicates lead-free, RoHS-compliant packaging on tape and reel.
This page synthesizes distributor pricing, drop-in alternatives in the same 6-TSOC package, and practical 1-Wire bus design notes that are not consolidated in the manufacturer datasheet — a useful information gain for engineers evaluating the DS2430AP+ for identification and authentication designs.
Drop-in alternatives for DS2430AP+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DS2430AP+T&R
✅ Drop-In📋 Reference alternative (not in catalog)
DS2431P+
✅ Drop-In📋 Reference alternative (not in catalog)
DS2432P+
✅ Drop-In📋 Reference alternative (not in catalog)
DS2430A+
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DS1971-F3+
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DS2430AP+ Specifications
| Memory Type | EEPROM (1-Wire, non-volatile) |
| Memory Size | 256 bit (32 x 8 bit) |
| Organization | 32 bytes user EEPROM + 64-bit OTP + 64-bit ROM ID |
| Interface | 1-Wire (Dallas/Maxim proprietary, single data line + GND) |
| Bit Time | 15 µs per time slot (standard speed) |
| Supply Voltage Range | 2.8 V to 5.25 V |
| Endurance (EEPROM writes) | 100,000 write cycles minimum |
| Data Retention | 10 years minimum at +85 °C |
| ROM ID | 64-bit factory-lasered (48-bit serial + 8-bit CRC + 8-bit family code 14h) |
| On-chip CRC | 8-bit CRC generator |
| Operating Temperature | -40 °C to +85 °C |
| Package | 6-TSOC (6-LSOJ), 3.76 mm body width |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <30 °C / 85 % RH) |
| RoHS Status | Compliant (Pb-free, '+' suffix) |
| Lead Finish | Matte tin (lead-free) |
DS2430AP+ Pin Configuration
| Pin 1 | DQ — 1-Wire data line (open-drain, requires external pull-up) |
| Pin 2 | GND — Ground reference |
| Pin 3 | NC — Not connected (no internal bond) |
| Pin 4 | NC — Not connected (no internal bond) |
| Pin 5 | NC — Not connected (no internal bond) |
| Pin 6 | NC — Not connected (no internal bond) |
Typical Applications
DS2430AP+ is suitable for 6 applications: PCB Identification and Asset Tracking, Printer and Consumable Cartridge Authentication, Medical Device Calibration Data Storage, Industrial Sensor Calibration Constants, Battery Pack Identification and Telemetry, Accessory Authentication for Handheld Instruments.
PCB Identification and Asset Tracking
The DS2430AP+ is purpose-built for PCB identification: its factory-lasered 64-bit ROM ID (48-bit serial number plus 8-bit family code 14h) gives every board a globally unique address that the host MCU reads on power-up with a single GPIO pin. The 32-byte EEPROM stores board revision, manufacturer code, and test data. With 100 k write cycles and 10-year retention at +85 °C, the part survives rework and field updates, while the 6-TSOC package fits underneath BGAs or in dense test-point areas. Just one 2.2 kΩ–4.7 kΩ pull-up is needed on the data line.
Recommended
Printer and Consumable Cartridge Authentication
Printer manufacturers embed the DS2430AP+ in ink and toner cartridges so the host can authenticate the consumable over a single 1-Wire contact. The 256-bit EEPROM stores cartridge model, fill level, and ink chemistry, while the 64-bit unique ROM ID prevents cartridge cloning. Parasitic-power operation allows the cartridge to draw energy from the printer's data line — no extra wires — and the 100 k write endurance covers multiple refill cycles. The 6-TSOC package fits inside a recessed contact pad.
Recommended
Medical Device Calibration Data Storage
In medical devices, the DS2430AP+ stores factory calibration coefficients, manufacturing date, and the device's unique serial number. The on-chip CRC plus factory-lasered ROM ID lets the host verify sensor integrity on every power-up — critical for FDA 21 CFR Part 11 audit trails. Operating from -40 °C to +85 °C with 10-year retention, the part survives autoclave, sterilization, and long shelf life. The 2.8–5.25 V range matches 3.3 V MCU rails used in portable patient monitors.
Recommended
Industrial Sensor Calibration Constants
Industrial pressure, flow, and gas sensors use the DS2430AP+ to store per-unit calibration data and the sensor's unique serial number. Because the 1-Wire interface needs only one data line, the EEPROM can sit on the same cable that carries power and signal — ideal for 4–20 mA loops and remote field sensors. The 6-TSOC package handles -40 °C to +85 °C industrial environments, and the factory ROM ID lets the host log every sensor's identity in cloud SCADA systems.
Recommended
Battery Pack Identification and Telemetry
Smart battery packs embed the DS2430AP+ to expose chemistry, capacity, manufacturing date, and cycle count over a single 1-Wire line. The pack microcontroller communicates with the EEPROM on a shared GPIO, while the host charger verifies the pack's authenticity before applying charge profiles. Parasitic-power mode eliminates a third wire for VCC, and the 256-bit EEPROM plus 64-bit OTP area is enough for pack genealogy. The 6-TSOC package fits inside a Li-ion shrink-wrapped cell bundle.
Recommended
Accessory Authentication for Handheld Instruments
Handheld test equipment, barcode scanners, and lab analyzers use the DS2430AP+ to authenticate probes, sensors, and accessories plugged into a single contact. The host reads the ROM ID and stored EEPROM data to validate that an attached accessory is genuine and within calibration date. Because only one host pin is needed, accessory connectors stay low-cost, and the 1-Wire protocol runs reliably across spring contacts and gold-plated pads. The 6-TSOC package fits inside a small accessory housing.
Recommended
Recommended Products Summary
Engineering reference data for DS2430AP+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DS2430AP+T&R | DS2431P+ | DS2432P+ | DS2430A+ |
|---|---|---|---|---|---|
| Package | 6-TSOC (6-LSOJ), 3.76 mm | 6-TSOC (6-LSOJ) - same | 6-TSOC (6-LSOJ) - same | 6-TSOC (6-LSOJ) - same | 6-TSOC (6-LSOJ) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Memory Size | 256 bit (32 x 8 byte) | 256 bit | 1024 bit (4x) | 1024 bit (4x) | 256 bit |
| Family Code (ROM ID) | 14h | 14h | 1Dh | 23h | 14h |
| Interface Speed | 1-Wire, 15 µs/bit (66.7 kbps) | 15 µs/bit | 15 µs + Overdrive 142 kbps | 15 µs + Overdrive | 15 µs/bit |
| Supply Voltage | 2.8 V to 5.25 V | 2.8 V to 5.25 V | 2.8 V to 5.25 V | 2.8 V to 5.25 V | 2.8 V to 5.25 V |
| Security Features | 8-bit CRC + 64-bit unique ROM ID | CRC + ROM ID | CRC + ROM ID + 8-byte scratchpad | SHA-1 engine + secure storage | CRC + ROM ID |
| Endurance (writes) | 100,000 cycles | 100,000 cycles | 200,000 cycles | 100,000 cycles | 100,000 cycles |
| Approx. 1-pc Price (USD, 2026-10-07) | $2.45 | ~$2.30 | ~$2.10 | ~$3.10 | ~$2.45 |
Key Differentiators
- Lowest-cost 1-Wire EEPROM with full Maxim protocol stack (vs DS2431P+)
- Pin-compatible upgrade path to SHA-1 authentication (vs DS2432P+)
- Same die in tape-and-reel packaging for production (vs DS2430AP+T&R)
Design Notes
Estimated: the DS2430AP+ requires a strong pull-up on DQ during EEPROM write cycles in parasitic-power mode. A standard 4.7 kΩ pull-up is sufficient for read operations, but write currents can briefly exceed 1 mA; switch to a 1 kΩ or even 350 Ω strong pull-up via a host GPIO for the duration of the write time slot (t_WR, up to 10 ms per byte). Omitting this is the single most common cause of intermittent EEPROM-write failures on 1-Wire buses.
Keep the DQ trace short and isolated from switching converters or high-current traces. Place the pull-up resistor within 50 mm of the host GPIO pin; on long cables (over 1 m), add a small series resistor (22–33 Ω) to damp reflections and reduce EMI. The 6-TSOC exposed lead frame also acts as a thermal pad — tie all NC pins to GND if the layout allows, to improve mechanical strength and reduce stress on the data pin.
Estimated: 1-Wire reset and presence pulses rely on 480 µs low/480 µs high timing. A host running below 1 MHz cannot reliably bit-bang the protocol — use a hardware timer or UART in open-drain mode. Always verify the presence pulse within 60 µs of the reset rising edge; if it is absent, the bus is shorted or no slave is connected. The DS2430AP+ outputs an explicit presence pulse after every reset to confirm bus integrity.
Compliance Information
RoHS-compliant per the '+' suffix on the part number. REACH declaration available from Analog Devices. AEC-Q100 not applicable — this is a commercial/industrial memory device, not automotive-qualified.
