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Microchip Technology AT45DB161-JC
- Part No.:
- AT45DB161-JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT45DB161-JC.pdf
- Description:
- IC FLASH 16MBIT SPI 13MHZ 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,292
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Product details
Overview
AT45DB161 from Microchip Technology is a 16-Mbit serial DataFlash® memory IC optimized for in-system reprogramming via SPI interface. It features 4096 pages × 528 bytes (17,301,504 bits), dual 528-byte SRAM buffers, 2.7V–3.6V single-supply operation, and hardware page write protection. It is used in digital voice, image, and embedded data logging systems where low pin count, sequential access, and buffer-assisted streaming are critical.
For engineers reviewing the AT45DB161 datasheet, AT45DB161 pinout, AT45DB161 application, or AT45DB161 equivalent, this page delivers verified electrical specs, validated SPI timing (Modes 0/3), confirmed buffer-to-page transfer latency (120 µs), real-world erase/program behavior (7 ms page program), and precise pin-level functional mapping - all directly traceable to Microchip's official AT45DB161 documentation.
Technical Context
The AT45DB161 implements a serial Flash architecture with two independent 528-byte SRAM buffers enabling concurrent data reception and nonvolatile memory reprogramming. Its memory is organized into 4096 pages (528 B/page), grouped into 512 blocks (8 pages/block) and 16 sectors (32 blocks/sector), supporting page-, block-, and sector-level erase granularity.
It uses a standard 3-wire SPI interface (CS, SCK, SI/SO) compatible with Modes 0 and 3, with internal self-timed programming cycles eliminating external timing control. The RDY/BUSY pin and status register (bit 7) provide hardware- and software-based busy-state monitoring during all Group A operations including page program, block erase, and buffer transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (17,301,504 bits), organized as 4096 × 528-byte pages |
| Supply Voltage | 2.7V–3.6V single supply - enables direct integration with 3.3V logic without level shifters |
| Max Clock Frequency | 13 MHz - supports up to 1.625 MB/s serial throughput in burst read mode |
| Page Program Time | 7 ms typical - defines minimum interval between successive page writes |
| Page-to-Buffer Transfer | 120 µs typical - enables rapid preload of next page while current page programs |
| Standby Current | 3 µA typical - ensures ultra-low power retention in battery-backed data loggers |
| Operating Temp | -40°C to +85°C (industrial grade) - qualified for automotive body electronics and industrial controllers |
Pinout & Package
AT45DB161 is available in TSOP-28, PLCC-32, SOIC-28, and CBGA packages. All variants share identical pin functions and signal definitions per Microchip's Rev. 0807E datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must remain low during full instruction sequence |
| SCK | Serial Clock | Master-generated clock; supports both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) |
| SI | Serial Input | Input for opcodes, addresses, and data; MSB-first, sampled on SCK rising edge in Mode 0, falling edge in Mode 3 |
| SO | Serial Output | Tri-state open-drain output for read data and status register; requires external pull-up |
| WP | Hardware Page Write Protect | Low = protects first 256 pages from accidental overwrite; internally pulled high |
| RESET | Chip Reset | Active-low asynchronous reset; terminates ongoing operation and returns state machine to idle |
| RDY/BUSY | Ready/Busy Indicator | Open-drain output driven low during self-timed operations (e.g., tEP, tBE, tXFR); used for polling or interrupt |
| VCC / GND | Power Supply | Single 2.7–3.6V supply; decoupling capacitor required within 1 cm of VCC pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 528-byte buffers allow simultaneous data streaming into one buffer while programming the other into Flash |
| Single-Cycle Reprogram | Integrated erase+program in one command (e.g., opcode 83H) eliminates separate erase step and simplifies firmware |
| Hardware Write Protection | WP pin physically disables programming of first 256 pages - prevents corruption of boot or configuration data |
| Buffer-to-Page Compare | Status register bit 6 reports match/mismatch after comparing main memory page vs. buffer content - enables integrity verification |
| Auto Page Rewrite | Opcode 58H/59H performs atomic read-modify-write on a single page - essential for field-updatable firmware patches |
Applications
| Digital Voice Recorder | Industrial Data Logger |
|---|---|
Use Scenario: Embedded voice prompt storage in HVAC controllers with field-upgradable audio assets. IC Role / Device Role / Timing Role: Nonvolatile serial memory storing compressed PCM or ADPCM voice clips; accessed sequentially via SPI during playback. Use Value: Dual-buffer architecture enables seamless audio streaming - next clip loads into buffer while current clip plays from Flash - eliminating playback gaps. |
Use Scenario: Battery-powered sensor node recording temperature, humidity, and pressure at 1 Hz for 30 days. IC Role / Device Role / Timing Role: High-reliability data sink using page-erase-and-program cycle to append timestamped sensor records without wear leveling overhead. Use Value: 3 µA standby current extends battery life beyond 1 year; hardware WP pin safeguards calibration data in first 256 pages. |
| Medical Diagnostic Device | Automotive Infotainment UI |
Use Scenario: Portable ECG monitor storing waveform snapshots for post-acquisition analysis. IC Role / Device Role / Timing Role: Burst-mode data capture buffer: raw ADC samples stream into SRAM buffer, then transferred to Flash pages in background. Use Value: 120 µs page-to-buffer transfer time allows >8 kHz effective sampling rate with zero dropped frames during Flash write. |
Use Scenario: In-dash display unit storing localized UI strings, icons, and theme assets across multiple languages. IC Role / Device Role / Timing Role: Firmware-accessible asset repository; updated via bootloader using block-erase for fast language-pack replacement. Use Value: Block erase (7–15 ms) clears 4224-byte language sections 5× faster than individual page erases - reduces OTA update time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB161B | Successor revision with improved endurance (100K cycles vs. 10K), faster tP (5 ms typ), and extended voltage range (2.5–3.6V) | Required for new designs per Microchip recommendation; not drop-in due to minor timing and endurance spec changes | Select AT45DB161B for production builds; AT45DB161 remains valid for legacy repair or cost-sensitive replacements where 10K cycles suffice. |
| W25Q16JV-IQ | 16 Mbit Quad SPI NOR Flash; supports x4 I/O, DTR, and 104 MHz clock; no SRAM buffers or auto-rewrite capability | Better raw speed and density scalability, but lacks concurrent buffer/Flash operation - requires external buffering logic for streaming use cases | Choose W25Q16JV-IQ when maximum read bandwidth or future upgrade path to higher densities is prioritized over seamless streaming. |
Compared with AT45DB161B, the AT45DB161 offers proven reliability in long-lifecycle industrial deployments but trades off endurance and speed; versus W25Q16JV-IQ, it delivers unique buffer-assisted streaming at lower system complexity, though with lower peak throughput and no quad-SPI support.
Availability
AT45DB161 is available at Aetrix Electronics and suitable for digital voice recorders, industrial data loggers, medical diagnostic devices, and automotive infotainment UIs requiring stable component supply across extended product lifecycles.
Supply support for AT45DB161 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions with broad industrial and automotive qualification.
The AT45DB161 belongs to Microchip's DataFlash® family - designed specifically for embedded systems needing reliable, low-pin-count serial Flash with integrated SRAM buffers to simplify streaming data acquisition and firmware updates.
FAQ
What is the maximum SPI clock frequency supported by the AT45DB161?
The AT45DB161 supports a maximum SCK frequency of 13 MHz under standard operating conditions (VCC = 2.7–3.6V, TA = -40°C to +85°C). This is specified in the AC Characteristics table of the official datasheet (Rev. 0807E), and corresponds to a theoretical serial data rate of ~1.625 MB/s in continuous read mode. Exceeding 13 MHz may cause timing violations in setup/hold windows and is not guaranteed to function reliably.
Does the AT45DB161 require a high-voltage programming signal?
No, the AT45DB161 does not require any high-voltage programming signal. It operates entirely from a single 2.7–3.6V supply for both read and program/erase operations. All programming cycles - including page program, block erase, and auto page rewrite - are internally self-timed and executed using standard SPI commands without external voltage boosting or special programming pulses. This simplifies system design and eliminates need for charge pumps or HV generators.
How does the dual-buffer architecture of the AT45DB161 improve system performance?
The AT45DB161's two independent 528-byte SRAM buffers enable true concurrency: while one buffer streams data into Flash (e.g., via Buffer-to-Main-Memory-Page-Program), the host processor can simultaneously load new data into the second buffer via Buffer-Write commands. This eliminates idle wait states during Flash programming (tEP ≈ 10–20 ms), allowing uninterrupted data acquisition or playback - a key advantage over conventional serial NOR/NAND Flash without integrated buffers.
Can the AT45DB161 be used in SPI Mode 0, or only Mode 3?
The AT45DB161 is explicitly compatible with both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in the "Serial Peripheral Interface (SPI) Compatible – Modes 0 and 3" feature list and timing diagrams in the datasheet. The device automatically detects the inactive clock polarity on each CS falling edge and adapts accordingly - no configuration register or hardware strap is needed to select mode.
What happens if the WP pin is left unconnected on the AT45DB161?
If the WP pin is left unconnected, the AT45DB161 operates normally because the WP pin has an internal pull-up resistor. However, the first 256 pages remain unprotected - meaning they can be erased or programmed at any time. To safeguard critical firmware or calibration data stored in those pages, Microchip recommends externally driving WP high (e.g., tie to VCC) if protection is not needed, or pulling it low only when intentional write-lock is required. Leaving it floating is electrically safe but forfeits hardware-level security.
AT45DB161-JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 528 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 13 MHz
- Write Cycle Time - Word, Page:
- 15ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT45DB161-JC FAQ
1.How can I place an order for AT45DB161-JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161-JC 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 AT45DB161-JC reliable?
The price and inventory of AT45DB161-JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161-JC is usually 5 days.
3.What payment methods are accepted for AT45DB161-JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161-JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161-JC?
AT45DB161-JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161-JC 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 AT45DB161-JC?
For technical support, including AT45DB161-JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161-JC requirements.
6.How does Aetrix verify that AT45DB161-JC is sourced from the original manufacturer or authorized distributors?
All AT45DB161-JC 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 AT45DB161-JC meets industry standards.
7.What is the process for return or replacement of AT45DB161-JC?
All AT45DB161-JC units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161-JC, 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 AT45DB161-JC part is unused and in its original packaging.
Return procedure for AT45DB161-JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45DB161-JC Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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