My Inquiry
My Account
Microchip Technology AT45DB161B-CC
- Part No.:
- AT45DB161B-CC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 24-LBGA, CSPBGA
- Datasheet:
-
AT45DB161B-CC.pdf
- Description:
- IC FLASH 16MBIT SPI 20MHZ 24CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT45DB161B-CC from Microchip Technology (formerly Atmel) is a 16-Mbit serial DataFlash memory IC with SPI interface, organized as 4096 pages × 528 bytes, featuring dual 528-byte SRAM buffers and hardware write protection. It operates from a single 2.5V–3.6V or 2.7V–3.6V supply, supports up to 20 MHz clock frequency, and enables continuous array read for code shadowing in embedded microcontroller systems.
For engineers reviewing the AT45DB161B-CC datasheet, AT45DB161B-CC pinout, AT45DB161B-CC application, or AT45DB161B-CC equivalent, this page delivers verified electrical parameters, buffer-assisted reprogrammability, ready/busy signaling, 5.0V-tolerant control pins, and industrial temperature support - all critical for firmware storage, data logging, and boot code retention in resource-constrained designs.
Technical Context
The AT45DB161B-CC implements a two-level memory architecture: main Flash array (4096 × 528 B) plus two independent 528-byte SRAM buffers, enabling simultaneous data reception into one buffer while programming the other into nonvolatile memory. Its SPI interface complies with Mode 0 and Mode 3, with MSB-first framing and self-timed internal erase/program cycles.
It uses page-granularity programming (528 B/page), supports optional page or block (8-page) erase, and provides status register polling via RDY/BUSY bit (bit 7) and compare result flag (bit 6). Hardware write protection (WP pin) locks the first 256 pages, and RESET pin forces state-machine reset without power cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (17,301,504 bits), organized as 4096 pages × 528 bytes - enables firmware image storage with built-in sector flexibility. |
| Supply Voltage | 2.5V–3.6V or 2.7V–3.6V single supply - eliminates need for charge pumps or dual-rail regulators in low-voltage systems. |
| Max Clock Frequency | 20 MHz SPI clock - supports high-throughput data streaming without parallel bus overhead. |
| SRAM Buffers | Two independent 528-byte buffers - allow pipelined write operations: receive new data while programming previous buffer to Flash. |
| Read Current (Typ) | 4 mA active read current - enables low-power operation during code execution or data retrieval in battery-backed applications. |
| Standby Current (Typ) | 2 µA CMOS standby current - ensures minimal quiescent draw during system sleep modes. |
| Input Tolerance | 5.0V-tolerant SI, SCK, CS, RESET, WP pins - simplifies level-shifting design when interfacing with 5V controllers. |
| Temperature Range | Commercial (0°C to +70°C) and Industrial (–40°C to +85°C) grades - validated for deployment in automotive body electronics and industrial HMIs. |
Pinout & Package
AT45DB161B-CC is packaged in a 28-pin TSOP (Thin Small Outline Package), Type 1, with 0.55 mm pitch and standard JEDEC MO-153 footprint. Pin functions are electrically defined and validated per Atmel datasheet Rev. 2224G.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command initiation; must remain low during full instruction sequence (opcode + address + data). |
| SCK | Serial Clock | Input-only clock; data latched on rising edge (SI), output shifted on falling edge (SO); supports SPI Mode 0/3. |
| SI | Serial Input | Input-only data line for opcodes, addresses, and buffer writes; MSB-first protocol required. |
| SO | Serial Output | Output-only data line for reads and status register; tri-stated when CS is high. |
| WP | Write Protect | Hardware lock for first 256 pages; low = protected, high = programmable - no software dependency. |
| RESET | Chip Reset | Asynchronous active-low reset of internal state machine; no external pull-up required due to internal POR circuit. |
| RDY/BUSY | Ready/Busy Indicator | Open-drain output; pulled low during self-timed operations (erase, program, transfer, compare) - enables polling or interrupt-driven flow control. |
| VCC / GND | Power Supply | Single 2.5–3.6V supply; decoupling capacitor recommended near VCC pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Array Read | Enables seamless code shadowing: auto-incrementing internal address counter eliminates host-side address management during sequential reads. |
| Buffer-Assisted Reprogramming | Allows concurrent data buffering and Flash programming - reduces effective write latency by overlapping I/O and nonvolatile storage phases. |
| Page-Level Erase/Program | Eliminates requirement for full-chip erase before update; supports field firmware patching without erasing unrelated sectors. |
| Hardware Write Protection | Physical pin-based lock for boot-critical pages (0–255), preventing accidental overwrite during field updates or recovery sequences. |
| 5.0V-Tolerant Control Pins | Permits direct connection to legacy 5V microcontrollers without external level shifters - lowers BOM count and layout complexity. |
| Status Register Polling | Bit 7 (RDY/BUSY) allows precise timing control without fixed delays; avoids worst-case timeout assumptions in real-time systems. |
Applications
| Firmware Storage | Data Logging |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M or PIC microcontrollers requiring reliable, field-upgradable code images. IC Role / Device Role / Timing Role: Nonvolatile storage medium accessed via SPI during boot or OTA update; RDY/BUSY signal synchronizes host CPU with internal Flash programming. Use Value: Dual-buffer architecture enables zero-downtime firmware swap: new image loaded into buffer while old image executes, then atomic page-programmed to Flash. |
Use Scenario: Capturing sensor readings (temperature, pressure, voltage) at 100 Hz in industrial monitoring nodes with limited RAM. IC Role / Device Role / Timing Role: High-endurance sequential write target using Continuous Array Read and page-erase minimization; WP pin secures configuration metadata. Use Value: 2 µA standby current extends battery life in wireless sensor nodes; 528-byte page size aligns with typical packetized telemetry payloads. |
| Code Shadowing | Embedded Configuration Storage |
Use Scenario: Executing application code directly from external memory on MCUs lacking sufficient internal Flash (e.g., early AVR or MSP430 variants). IC Role / Device Role / Timing Role: SPI slave providing linear, wrap-around read access across full 16 Mbit array; RDY/BUSY idle during reads enables deterministic fetch timing. Use Value: Continuous Array Read mode eliminates per-byte address overhead - sustains >1.5 MB/s effective throughput at 20 MHz SCK with no gaps at page boundaries. |
Use Scenario: Retaining calibration coefficients, user preferences, and network credentials across power cycles in smart home hubs and medical devices. IC Role / Device Role / Timing Role: EEPROM-emulation via Read-Modify-Write using buffer compare and auto-rewrite; WP pin prevents corruption of safety-critical settings. Use Value: Page-level granularity (528 B) allows storing multiple parameter sets per page; hardware protection ensures factory defaults survive accidental writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB161D-CU | Same density and pinout, but in 8-lead SOIC package; lacks RDY/BUSY pin (uses status register polling only); supports 2.7–3.6V only. | No dedicated busy indicator pin - requires additional software polling overhead; smaller footprint suits space-constrained PCBs. | Select when board area is critical and host firmware can tolerate status-register polling instead of hardware interrupt signaling. |
| W25Q16JVSSIQ | 16 Mbit Quad SPI Flash; 1.8V–3.6V supply; supports QPI/DTR modes; no SRAM buffers; no RDY/BUSY pin; different command set and timing. | Higher bandwidth potential via quad I/O, but no concurrent buffer operation; requires full command-set redesign and lacks hardware write protection granularity. | Select for cost-sensitive, high-volume applications where quad-speed read performance outweighs buffer-assisted write flexibility and hardware page locking. |
Compared with AT45DB161D-CU, the AT45DB161B-CC offers hardware RDY/BUSY signaling and broader voltage range (2.5V min), improving real-time determinism and compatibility with ultra-low-voltage SoCs; versus W25Q16JVSSIQ, it trades raw speed for deterministic write pipelining and robust page-level protection - critical for safety-aware firmware storage.
Availability
AT45DB161B-CC is available at Aetrix Electronics and suitable for firmware storage, data logging, code shadowing, and embedded configuration retention requiring stable component supply across extended product lifecycles.
Supply support for AT45DB161B-CC 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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the DataFlash family, including long-term support, qualified wafer sources, and documented obsolescence mitigation paths.
The AT45DB161B-CC belongs to Microchip's legacy DataFlash product line, designed specifically for SPI-based embedded systems needing buffer-enhanced reprogrammability, hardware write protection, and deterministic timing - targeting industrial control, medical instrumentation, and automotive body electronics.
FAQ
What is the maximum clock frequency supported by the AT45DB161B-CC?
The AT45DB161B-CC supports a maximum SPI clock frequency of 20 MHz under specified operating conditions (2.5V–3.6V supply, commercial temperature range). This timing is validated for all read, write, and status register operations per Atmel datasheet Rev. 2224G. Exceeding 20 MHz may cause command rejection or data corruption, and is not guaranteed across voltage or temperature extremes. The AT45DB161B-CC does not require external clock dividers or phase alignment circuits to achieve this rate.
Does the AT45DB161B-CC require a high-voltage programming signal?
No, the AT45DB161B-CC performs all programming and erase operations using only its standard 2.5V–3.6V supply rail - no external high-voltage generator or VPP pin is needed. Internal charge pumps handle the elevated voltages required for Flash tunneling, making the AT45DB161B-CC compatible with single-rail embedded systems. This eliminates external HV circuitry and simplifies compliance with low-voltage safety standards.
How does the RDY/BUSY pin on the AT45DB161B-CC function during programming?
The RDY/BUSY pin on the AT45DB161B-CC is an open-drain output that drives low during any self-timed internal operation - including page/block erase, buffer-to-Flash programming, page transfer, and compare. It remains low until the operation completes, then returns high. This allows hardware interrupt or polling-based synchronization without fixed timeouts. The AT45DB161B-CC guarantees valid RDY/BUSY assertion for all eight defined busy states per datasheet Section "Status Register Read".
Can the AT45DB161B-CC be used as a direct replacement for the AT45DB161?
Yes, the AT45DB161B-CC is explicitly stated as 100% compatible with the AT45DB161 in its official datasheet, sharing identical pinout, command set, timing, and memory organization. Key enhancements - including improved 5.0V-tolerant inputs and updated reliability specs - are backward-compatible. No PCB or firmware changes are required when upgrading from AT45DB161 to AT45DB161B-CC, and the AT45DB161B-CC maintains full functional equivalence across all documented use cases.
What is the purpose of the two SRAM buffers in the AT45DB161B-CC?
The AT45DB161B-CC integrates two independent 528-byte SRAM buffers to enable concurrent data handling: one buffer can receive new data via SPI while the other is being programmed into Flash memory. This pipelining eliminates idle time between transfers and dramatically improves effective write throughput - especially critical in continuous data capture or firmware update scenarios. The AT45DB161B-CC uses these buffers for buffer write, buffer-to-Flash program, page transfer, and compare operations, all fully documented in the command tables of its datasheet.
AT45DB161B-CC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-LBGA, CSPBGA
- Packaging:
- Tray
- 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:
- 20 MHz
- Write Cycle Time - Word, Page:
- 14ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-CBGA (6x8)
AT45DB161B-CC FAQ
1.How can I place an order for AT45DB161B-CC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB161B-CC 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 AT45DB161B-CC reliable?
The price and inventory of AT45DB161B-CC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB161B-CC is usually 5 days.
3.What payment methods are accepted for AT45DB161B-CC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB161B-CC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB161B-CC?
AT45DB161B-CC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB161B-CC 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 AT45DB161B-CC?
For technical support, including AT45DB161B-CC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB161B-CC requirements.
6.How does Aetrix verify that AT45DB161B-CC is sourced from the original manufacturer or authorized distributors?
All AT45DB161B-CC 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 AT45DB161B-CC meets industry standards.
7.What is the process for return or replacement of AT45DB161B-CC?
All AT45DB161B-CC units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB161B-CC, 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 AT45DB161B-CC part is unused and in its original packaging.
Return procedure for AT45DB161B-CC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT45DB161B-CC 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…
