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Microchip Technology AT25160B-PU
- Part No.:
- AT25160B-PU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT25160B-PU.pdf
- Description:
- IC EEPROM 16KBIT SPI 20MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,772
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Product details
Overview
AT25160B-PU from Microchip Technology (formerly Atmel) is a 16-Kbit SPI serial EEPROM organized as 2048 words × 8 bits, operating from 1.8 V to 5.5 V, supporting 20 MHz clock rate at 5 V, featuring 32-byte page write and hardware/software write protection. It serves as nonvolatile configuration storage in industrial controllers, sensor nodes, and embedded power management systems.
For engineers reviewing the AT25160B-PU datasheet, AT25160B-PU pinout, AT25160B-PU application, or AT25160B-PU equivalent, this page delivers verified electrical specs, JEDEC PDIP-8 package details, SPI Mode 0/3 timing compliance, block protection mapping, and real-world design implications for low-voltage memory retention and write-cycle reliability.
Technical Context
The AT25160B-PU implements a synchronous slave SPI interface with dedicated SI/SO pins, CS-controlled selection, and HOLD/ WP pins for runtime suspension and hardware-level data protection. Its instruction set includes WREN/WRDI for latch control, RDSR/WRSR for status register access, and READ/WRITE for memory operations - all MSB-first with no erase cycle required.
It uses nonvolatile status register bits (BP0/BP1/WPEN) to configure 1/4, 1/2, or full-array write protection, with WPEN enabling or disabling hardware write protect via the WP pin. Internal self-timed write cycles complete in ≤5 ms, and endurance is rated at 1 million write cycles with 100-year data retention at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit words) - sufficient for firmware boot parameters, calibration tables, or device ID storage in space-constrained designs. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level-shifting. |
| Max Clock Frequency | 20 MHz at VCC = 5 V - enables fast configuration loading during system startup or field updates. |
| Page Write Size | 32 bytes per page - balances write speed and granularity for efficient partial-memory updates without full-chip rewrites. |
| Write Cycle Time | ≤5 ms max - defines minimum interval between successive write commands; impacts real-time logging latency. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life industrial deployments where infrequent but critical writes occur. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including motor drives and environmental sensors. |
Pinout & Package
AT25160B-PU is packaged in an 8-lead JEDEC-standard Plastic Dual Inline Package (PDIP), 0.300" wide body (package code 8P3), lead-free/halogen-free, suitable for through-hole prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept instructions; high-impedance SO when deasserted. |
| SCK | Serial Clock | Master-generated clock input; defines timing for SI sampling and SO output; supports SPI Modes 0 and 3. |
| SI | Serial Data Input | Input-only data line for op-codes, addresses, and write data; MSB-first transmission required. |
| SO | Serial Data Output | Output-only data line for read data and status register contents; tri-stated when CS is high. |
| GND | Ground Reference | Primary return path for VCC and I/O signals; must be low-impedance to maintain noise immunity during SPI bursts. |
| VCC | Power Supply | Single supply input (1.8–5.5 V); powers internal logic and memory array; bypass capacitor recommended. |
| WP | Write Protect | Hardware lock for status register and protected memory blocks when WPEN = 1 and WP = low. |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting sequence; requires SCK low before assertion. |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Compatibility | Interoperates with 68HC11, PIC, ARM Cortex-M, and other common MCU SPI peripherals without protocol translation. |
| Block Write Protection | Four configurable protection levels (none, 1/4, 1/2, full array) prevent accidental overwrites of critical firmware or calibration data. |
| Hardware + Software Write Protection | Combines WP pin control with WRSR-configurable BP0/BP1 bits for layered security against both software bugs and external voltage faults. |
| Self-Timed Write Cycle | No external timing control needed; internal state machine manages programming voltage and verify - simplifies host firmware. |
| Low Standby Current | ≤0.1 µA at 1.8 V (ISB1) - extends battery life in always-on IoT edge devices and portable instrumentation. |
Applications
| Industrial PLC Configuration Storage | Medical Sensor Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during cold boot and runtime parameter updates via SPI. Use Value: Ensures deterministic startup behavior after power loss and supports field recalibration without firmware reflashing. | Use Scenario: Holding factory-trimmed offset/gain coefficients and patient-specific calibration data in portable ECG or pulse oximeter modules. IC Role / Device Role / Timing Role: Secure, low-power memory for precision analog front-end tuning data, accessed only during initialization or service mode. Use Value: Maintains measurement accuracy across device lifetime and eliminates need for external calibration hardware. |
| Smart Energy Meter Firmware Parameters | Automotive Body Control Module Settings |
Use Scenario: Storing tariff schedules, metering constants, and tamper-event logs in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant parameter store with WP/HOLD support for secure field updates and audit trail persistence. Use Value: Meets ANSI/IEC data integrity requirements while enabling remote firmware patching via secure bootloader. | Use Scenario: Saving user preferences (mirror position, seat memory), fault codes, and CAN node configuration in 12 V automotive BCMs. IC Role / Device Role / Timing Role: SPI-connected configuration EEPROM interfaced to an 8-bit or 32-bit automotive MCU with watchdog supervision. Use Value: Survives 12 V battery disconnects and operates reliably across –40°C to +85°C ambient range per AEC-Q100 stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95160-WMN6TP | Same 16 Kbit density, SPI interface, and 1.8–5.5 V operation; differs in AC timing (10 MHz max at 1.8 V vs. AT25160B-PU's 5 MHz), and uses different status register bit layout. | Optimized for STMicroelectronics ecosystem; lacks HOLD pin - requires host-side pause handling. | Select when sourcing from ST-designated supply chains or when HOLD functionality is not required. |
| 25AA160CT-I/P | Microchip's pin-compatible 16 Kbit SPI EEPROM; identical PDIP-8 package and pinout; differs in default WPEN behavior (enabled at power-up vs. AT25160B-PU's disabled state) and slightly higher ISB3 (3 µA vs. 2 µA). | Drop-in replacement with identical footprint and timing; minor firmware adjustment needed for status register initialization. | Choose for seamless second-source availability within Microchip portfolio and guaranteed long-term supply continuity. |
Compared with M95160-WMN6TP and 25AA160CT-I/P, the AT25160B-PU offers unique HOLD pin support for interruptible SPI transfers and a documented 20 MHz clock capability at 5 V - advantageous in high-throughput industrial logging and dual-MCU co-processor architectures.
Availability
AT25160B-PU is available at Aetrix Electronics and suitable for industrial PLCs, medical sensor calibration, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT25160B-PU 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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT25160B-PU belongs to Microchip's legacy Atmel SPI EEPROM product line, engineered for robust, low-power, and pin-efficient configuration storage in resource-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by the AT25160B-PU?
The AT25160B-PU supports up to 20 MHz SCK frequency at VCC = 5.0 V. At lower voltages, the maximum clock rate reduces: 10 MHz at 2.7–5.5 V and 5 MHz at 1.8–5.5 V. These values are specified in Table 0-4 of the official datasheet and reflect guaranteed timing margins across the full industrial temperature range (–40°C to +85°C). The AT25160B-PU must be operated within these limits to ensure reliable read/write operation.
Does the AT25160B-PU require an external erase cycle before writing?
No, the AT25160B-PU does not require a separate erase cycle. All write operations are self-timed and automatically erase and program the target memory location in a single internal sequence. This simplifies firmware implementation - only a WREN instruction followed by WRITE is needed. The AT25160B-PU completes each write in ≤5 ms, after which the RDY bit in the status register clears to indicate readiness for the next command.
How is write protection configured on the AT25160B-PU?
Write protection on the AT25160B-PU is configured using two nonvolatile status register bits (BP0 and BP1) set via the WRSR instruction, enabling four protection levels: none, 1/4 array, 1/2 array, or full array. Hardware protection is enabled only when WPEN = 1 and the WP pin is held low. The AT25160B-PU's WP pin function is inactive unless WPEN is programmed, allowing flexible system-level protection strategies.
What package type is used for the AT25160B-PU?
The AT25160B-PU uses an 8-lead JEDEC-standard Plastic Dual Inline Package (PDIP), 0.300" wide body (package code 8P3), with lead-free/halogen-free finish. It is offered in bulk form only, making it suitable for manual assembly, prototyping, and low-volume industrial repairs. Pin 1 is marked with a notch or dot, and the pinout matches standard JEDEC MS-001 BA variation.
Can the AT25160B-PU operate from a 1.8 V supply?
Yes, the AT25160B-PU is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, it supports SPI communication up to 5 MHz, maintains ≤0.1 µA standby current (ISB1), and retains full functionality including WREN, WRITE, and RDSR. All DC and AC parameters in the datasheet are characterized across this voltage range, and the AT25160B-PU meets its 1 million write cycle and 100-year data retention specifications at 1.8 V and 25°C.
AT25160B-PU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT25160B-PU FAQ
1.How can I place an order for AT25160B-PU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25160B-PU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25160B-PU reliable?
The price and inventory of AT25160B-PU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25160B-PU is usually 5 days.
3.What payment methods are accepted for AT25160B-PU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25160B-PU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25160B-PU?
AT25160B-PU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25160B-PU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25160B-PU?
For technical support, including AT25160B-PU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25160B-PU requirements.
6.How does Aetrix verify that AT25160B-PU is sourced from the original manufacturer or authorized distributors?
All AT25160B-PU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25160B-PU meets industry standards.
7.What is the process for return or replacement of AT25160B-PU?
All AT25160B-PU units undergo pre-shipment inspection (PSI). If there is an issue with AT25160B-PU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25160B-PU part is unused and in its original packaging.
Return procedure for AT25160B-PU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25160B-PU Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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