My Inquiry
My Account
Microchip Technology 93AA56B-I/P
- Part No.:
- 93AA56B-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93AA56B-I/P.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,732
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA56B-I/P from Microchip Technology is a 2 Kbit (128 × 16-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and industrial temperature rating (−40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin. Used in microcontroller-based systems for parameter storage, calibration data retention, and configuration memory.
For engineers reviewing the 93AA56B-I/P datasheet, 93AA56B-I/P pinout, 93AA56B-I/P application, or 93AA56B-I/P equivalent, key selection considerations include its fixed 16-bit organization (no ORG pin), PDIP-8 package compatibility, 1 million erase/write endurance, 200-year data retention, and support for sequential read and WRAL/ERAL commands under ≥4.5 V operation.
Technical Context
The 93AA56B-I/P implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals - no ORG pin present, enforcing dedicated 16-bit word access. All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are initiated by a Start bit followed by opcode, address (7-bit), and data (16 bits for WRITE/WRAL), requiring 27 clock cycles for execution.
Internal logic includes power-on reset detection (VPOR ≈ 1.5 V), automatic standby mode when CS is low, and Ready/Busy polling via DO pin after TCSL ≥ 250 ns. Write operations trigger auto-erase prior to programming, and WRAL/ERAL require VCC ≥ 4.5 V for reliable execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit organized as 128 words × 16 bits - enables compact storage of 16-bit configuration registers or sensor calibration coefficients. |
| VCC 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. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems with frequent parameter writes. |
| Data retention | Greater than 200 years at 25°C - guarantees nonvolatile storage integrity across product lifecycles without refresh. |
| Write cycle time | 6 ms typical (TWC) - defines minimum interval between successive WRITE/ERAL/WRAL commands; impacts firmware write-sequence timing. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - requires only four GPIOs and no external components for basic communication. |
| Temperature grade | Industrial (−40°C to +85°C) - validated for deployment in embedded control, industrial HMI, and automotive body electronics. |
Pinout & Package
8-lead PDIP (Plastic Dual In-line Package) with 0.3-inch body width; lead finish is Pb-free matte tin. Pin 1 marked by notch or dot; pin 1 ID confirmed per Microchip DS21794G-page 17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable signal; device enters Standby mode when low, but completes ongoing write cycles before entering sleep. |
| 2 CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data and clocks out read data/status. |
| 3 DI | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; must be stable before first CLK rising edge. |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low or during non-read states. |
| 5 VSS | Ground | Reference return path for all digital and internal analog circuitry; must be low-impedance connection. |
| 6 NC | No Connection | Internally unconnected; must remain floating or tied to ground per layout best practice - not used for ORG function. |
| 7 NC | No Connection | Internally unconnected; no electrical function; avoid routing signals or traces to this pin. |
| 8 VCC | Power Supply | Supplies core logic and memory array; bypass capacitor (0.1 µF ceramic) required within 10 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - firmware waits only for DO high or uses polling, simplifying driver implementation. |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing stale data corruption without explicit command sequencing. |
| Power-on/off data protection | Hardware-level lockout below VPOR ≈ 1.5 V prevents spurious writes during brown-out or power ramp, enhancing system robustness. |
| Ready/Busy status on DO | Enables real-time monitoring of write progress without additional pins or interrupts - reduces MCU resource usage. |
| Sequential read mode | Allows continuous reading of multiple locations with single CS assertion, improving throughput for block data retrieval. |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing meter-specific gain/offset calibration coefficients updated during factory trim or field recalibration. IC Role / Device Role / Timing Role: Nonvolatile parameter register holding 16-bit signed calibration values accessed at power-up and during maintenance mode. Use Value: Enables traceable, field-upgradable calibration without firmware reflash; 200-year retention ensures accuracy over utility infrastructure lifetime. | Use Scenario: Retaining I/O mapping, PID loop parameters, and alarm thresholds across power cycles in modular PLC backplanes. IC Role / Device Role / Timing Role: Dedicated configuration EEPROM interfaced to PLC CPU via GPIO bit-banged Microwire protocol. Use Value: Supports hot-swap module identification and state recovery; 1M endurance accommodates daily parameter logging and updates. |
| Automotive Body Control Module | Medical Device Usage Log |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock settings in 12 V automotive systems with LDO-regulated 3.3 V rail. IC Role / Device Role / Timing Role: Low-power serial EEPROM operating at 3.3 V, accessed during ignition-on initialization and user input events. Use Value: Industrial temp grade ensures reliability under hood-adjacent mounting; 1.8 V min VCC allows direct use with wide-input DC/DC converters. | Use Scenario: Recording cumulative operational hours, error codes, and calibration timestamps in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory storing auditable usage history with deterministic write timing (6 ms max). Use Value: Meets IEC 62304 data integrity requirements; hardware write-protection (EWDS) prevents accidental overwrite during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B-I/P | VCC range 2.5–5.5 V (vs. 1.8–5.5 V); identical 128 × 16-bit organization, pinout, and instruction set. | Not suitable for 1.8 V systems; otherwise drop-in compatible in 3.3 V/5 V designs with same timing and software. | Select when higher minimum VCC is acceptable and legacy 93LC family qualification is required. |
| AT25020B-MAU-T | SPI interface (4-wire), 2 Kbit × 8-bit organization, 1.8–5.5 V, 20 MHz max clock; no ERAL/WRAL commands. | Requires SPI peripheral instead of bit-banged Microwire; lacks bulk-erase functionality - firmware must manage page-by-page erase. | Choose for higher-speed communication or existing SPI infrastructure; accept added firmware complexity for erase management. |
Compared with 93LC56B-I/P, the 93AA56B-I/P extends low-voltage operation to 1.8 V for battery-powered devices; compared with AT25020B-MAU-T, it offers native Microwire compatibility and hardware-accelerated bulk operations but at lower maximum clock rate.
Availability
93AA56B-I/P is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical device configuration storage requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for 93AA56B-I/P 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona.
The 93XX series EEPROMs were designed for cost-sensitive, low-power embedded systems requiring simple, reliable nonvolatile storage with minimal GPIO overhead and robust data integrity.
FAQ
What is the memory organization of the 93AA56B-I/P?
The 93AA56B-I/P has a fixed 128 × 16-bit organization - meaning it stores 128 words of 16 bits each, totaling 2,048 bits. Unlike 'C' variants, it lacks an ORG pin and does not support runtime switching between 8-bit and 16-bit modes. This configuration is optimized for systems using 16-bit data paths or requiring aligned word storage.
Does the 93AA56B-I/P require an external pull-up resistor on the DO pin?
No, the 93AA56B-I/P does not require an external pull-up on DO. The DO pin actively drives high/low during READ or Ready/Busy polling and enters High-Z when inactive. However, if DI and DO are shorted (shared bus), a current-limiting resistor (e.g., 10 kΩ) is recommended to prevent bus conflict during dummy-zero read phases.
Can the 93AA56B-I/P operate reliably at 1.8 V during write operations?
Yes, the 93AA56B-I/P supports full functionality - including WRITE, ERASE, ERAL, and WRAL - across its entire rated VCC range of 1.8 V to 5.5 V. However, ERAL and WRAL commands require VCC ≥ 4.5 V per datasheet specification (DS21794G, Sections 2.5 and 2.9), so those bulk operations are disabled below that threshold.
How is write protection implemented on the 93AA56B-I/P?
Write protection on the 93AA56B-I/P is enforced through the Erase/Write Enable (EWEN) and Erase/Write Disable (EWDS) instructions. The device powers up in EWDS mode, blocking all erase/write commands until EWEN is issued. After any write, executing EWDS restores protection - a critical safeguard against accidental overwrites during noise events or firmware faults.
What package type does the '-I/P' suffix indicate for the 93AA56B-I/P?
For the 93AA56B-I/P, the '-I/P' suffix denotes Industrial temperature grade (−40°C to +85°C) and 8-lead PDIP (Plastic Dual In-line Package) with 0.3-inch width. This through-hole package is suited for prototyping, legacy board designs, and applications requiring mechanical robustness and hand-solderability.
93AA56B-I/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 128 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- 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
93AA56B-I/P FAQ
1.How can I place an order for 93AA56B-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56B-I/P 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 93AA56B-I/P reliable?
The price and inventory of 93AA56B-I/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56B-I/P is usually 5 days.
3.What payment methods are accepted for 93AA56B-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56B-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56B-I/P?
93AA56B-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56B-I/P 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 93AA56B-I/P?
For technical support, including 93AA56B-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56B-I/P requirements.
6.How does Aetrix verify that 93AA56B-I/P is sourced from the original manufacturer or authorized distributors?
All 93AA56B-I/P 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 93AA56B-I/P meets industry standards.
7.What is the process for return or replacement of 93AA56B-I/P?
All 93AA56B-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56B-I/P, 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 93AA56B-I/P part is unused and in its original packaging.
Return procedure for 93AA56B-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA56B-I/P Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
