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Texas Instruments AM1705BPTP3
- Part No.:
- AM1705BPTP3
- Manufacturer:
- Texas Instruments
- Category:
- Microprocessors
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
AM1705BPTP3.pdf
- Description:
- IC MPU SITARA 375MHZ 176HLQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
AM1705BPTP3 from Texas Instruments is a 375-MHz ARM926EJ-S™ microprocessor in a 176-pin HLQFP (PTP) package, featuring 16KB instruction cache, 16KB data cache, 128KB on-chip RAM, and integrated peripherals including 10/100 Mbps Ethernet MAC, three UARTs, two McASPs, USB 2.0 OTG with PHY, and PRUSS for real-time I/O offload - deployed in industrial automation controllers requiring deterministic response and Linux-capable processing.
For engineers reviewing the AM1705BPTP3 datasheet, AM1705BPTP3 pinout, AM1705BPTP3 application, or AM1705BPTP3 equivalent, this page delivers verified technical context, validated pin functions, confirmed peripheral capabilities, and precise alternative part comparisons - all grounded in TI's SPRS657F production data sheet (Jan 2017 revision).
Technical Context
The AM1705BPTP3 implements a full-featured ARM926EJ-S core with MMU, VIVT caches, and Jazelle® Java acceleration, enabling robust Linux/RTOS execution. Its memory subsystem includes 128KB SRAM, 64KB ROM, and dual external interfaces: EMIFA (NAND/NOR/Flash) and EMIFB (16-bit SDRAM up to 128 MB).
Real-time capability is extended via the Programmable Real-Time Unit Subsystem (PRUSS) - two independent 32-bit RISC cores with 4KB IRAM + 512B DRAM each - directly accessible over dedicated switched central resource, supporting time-critical I/O without CPU intervention. Peripheral control is coordinated through EDMA3 (32 channels), PSC clock gating, and configurable GPIO banks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM926EJ-S @ 375 MHz (1.2V core); supports ARM/Thumb instructions, MMU, Jazelle, and Embedded ICE-RT debug. |
| Memory | 128KB on-chip SRAM + 64KB ROM + 16KB I-cache + 16KB D-cache - enables boot-from-ROM and fast kernel/data access without external memory. |
| EMAC | IEEE 802.3-compliant 10/100 Mbps Ethernet MAC with RMII interface and MDIO management - supports industrial networking without external PHY. |
| USB | USB 2.0 OTG port with integrated full-speed PHY (USB0), supporting host/client modes and four configurable endpoints - eliminates need for external transceiver. |
| PRUSS | Two programmable 32-bit PRU cores, each with 4KB IRAM and 512B DRAM, under single PSC clock domain - handles time-critical I/O (e.g., PWM sync, encoder capture) independently of ARM. |
| Timers & PWM | Three eHRPWM modules (6 single-edge or 3 dual-edge asymmetric outputs with dead-band), three eCAP modules (32-bit capture or APWM), and two 64-bit general-purpose timers - suitable for motor control and sensor interfacing. |
| I/O Voltage | 3.3-V LVCMOS I/Os (except USB analog rails); supports direct interface to standard industrial logic and peripherals without level shifters. |
Pinout & Package
AM1705BPTP3 uses a 176-pin PowerPAD™ plastic quad flat pack (HLQFP-PTP), 24.00 mm × 24.00 mm body, 0.5-mm pitch, with exposed thermal pad (Pin 177 = SS). Pin functions are multiplexed across eight GPIO banks and dedicated peripheral signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1–40 (e.g., UART0_RXD, SPI0_CLK, EMA_A[0]) | Multiplexed GPIO/peripheral I/O | Configurable as UART, SPI, EMIFA address/data, or general-purpose input/output - enables flexible board routing and function allocation. |
| Pin 61–87 (e.g., EMB_D[0]–EMB_D[15], EMB_CLK) | EMIFB SDRAM interface | 16-bit bidirectional data bus + clock/control for high-speed SDRAM (up to 128 MB) - supports real-time buffering and OS heap expansion. |
| Pin 111–122 (e.g., AXR0[0], RMII_TXD[0], MDIO_CLK) | EMAC/RMII & MDIO interface | Dedicated 2-wire MDIO + 7-signal RMII (TXD[0:1], RXD[0:1], CRS_DV, TXEN, REFCLK) - enables compact 10/100 Ethernet with minimal external components. |
| Pin 137–138 (USB0_DP / USB0_DM) | USB 2.0 differential pair | Full-speed USB 2.0 physical layer signals routed directly from on-die PHY - requires only series resistors and ESD protection per USB spec. |
| Pin 177 (SS) | Thermal pad (exposed die attach) | Electrically connected to substrate ground; must be soldered to PCB thermal plane for junction temperature control below 105°C. |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S with MMU | Enables full Linux kernel execution and memory protection - critical for secure, multi-process industrial firmware. |
| PRUSS dual-core subsystem | Offloads deterministic real-time tasks (e.g., PWM generation, quadrature decoding) from ARM, reducing latency and jitter. |
| Integrated USB 2.0 OTG PHY | Eliminates external transceiver; supports device enumeration and host-mode peripheral control (e.g., flash drives, HID devices). |
| EMAC with RMII + MDIO | Reduces Ethernet BOM count by integrating PHY interface and register-level PHY configuration - simplifies compliance testing. |
| eHRPWM with dead-band & chopping | Supports three-phase motor drive with hardware-enforced shoot-through prevention and carrier-based modulation for noise reduction. |
| EDMA3 with QDMA channels | Enables zero-CPU-overhead data movement between peripherals (e.g., McASP ↔ RAM, EMAC ↔ buffer) - essential for audio streaming and network throughput. |
Applications
| Industrial PLC Controller | Human-Machine Interface (HMI) |
|---|---|
Use Scenario: Compact DIN-rail-mounted controller executing real-time ladder logic while hosting web-based configuration UI. IC Role / Device Role / Timing Role: AM1705BPTP3 serves as main application processor running Linux, managing EtherNet/IP stack, and coordinating PRUSS for I/O scanning at 1-ms intervals. Use Value: Integrated EMAC + PRUSS eliminates external FPGA or ASIC for fieldbus timing, reducing BOM cost and board area by >30% versus discrete solutions. |
Use Scenario: Touchscreen panel with local graphics rendering, serial device bridging (RS-485 to USB), and remote diagnostics via Ethernet. IC Role / Device Role / Timing Role: AM1705BPTP3 hosts Qt-based GUI, manages McASP for audio alerts, and routes UART/USB/EMAC traffic via Linux drivers. Use Value: On-chip 128KB RAM + 16KB caches enable smooth UI frame rates without external SDRAM, lowering power and EMI emissions. |
| Portable Data Terminal | Test & Measurement Instrument |
Use Scenario: Battery-powered handheld scanner with barcode reader, Wi-Fi module (via UART), and encrypted data logging. IC Role / Device Role / Timing Role: AM1705BPTP3 executes lightweight RTOS for sensor acquisition, manages MMC/SD card writes, and handles USB CDC for PC sync. Use Value: 3.3-V I/O compatibility allows direct connection to common barcode engines and SD cards - no level-shifting ICs required. |
Use Scenario: Benchtop oscilloscope with analog front-end ADC interface, waveform display, and LAN-based remote control. IC Role / Device Role / Timing Role: AM1705BPTP3 processes ADC samples via eCAP timestamping, renders UI using framebuffer, and serves web interface via EMAC. Use Value: eCAP's 4-event timestamp capture enables sub-microsecond trigger resolution for pulse-width analysis - matching dedicated measurement SoCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM1808BPTP3 | Higher 456-MHz ARM926EJ-S, same PTP package, adds SATA controller and enhanced security accelerators. | Better suited for video streaming or encrypted data gateways where throughput >375 MHz or SATA storage is required. | Select AM1808BPTP3 when higher CPU performance or SATA interface is mandatory; otherwise AM1705BPTP3 offers lower power and cost. |
| AM3352BZCZ100 | ARM Cortex-A8 @ 1 GHz, 100-pin BGA, integrated DDR2 controller, lacks PRUSS and EMIFB SDRAM support. | Targets higher-performance UIs and multimedia; not drop-in compatible due to different package, memory architecture, and peripheral set. | Choose AM3352BZCZ100 for Android/Linux GUI applications needing >1 GHz CPU; AM1705BPTP3 remains optimal for deterministic I/O + Ethernet + low-power industrial use. |
Compared with AM1808BPTP3, AM1705BPTP3 trades peak frequency for lower 1.2-V core voltage and reduced thermal load - ideal for fanless enclosures. Versus AM3352BZCZ100, it retains PRUSS and EMIFB for real-time control but sacrifices raw compute - making it more suitable for cost-sensitive, thermally constrained PLCs and HMIs.
Availability
AM1705BPTP3 is available at Aetrix Electronics and suitable for industrial automation controllers, human-machine interfaces, and portable data terminals requiring stable component supply, long-term lifecycle support, and qualified automotive/industrial temperature grade availability.
Supply support for AM1705BPTP3 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial and automotive-grade microprocessors.
The AM1705BPTP3 belongs to TI's Sitara™ ARM processor family, designed specifically for cost-sensitive, real-time industrial applications requiring Linux capability, deterministic I/O, and integrated connectivity - not general-purpose computing.
FAQ
What is the maximum operating frequency of the AM1705BPTP3?
The AM1705BPTP3 operates at a maximum frequency of 375 MHz when powered at 1.2 V nominal core voltage, as specified in TI's SPRS657F production data sheet. This frequency is fixed for the AM1705BPTP3 variant; the 456-MHz option corresponds to the AM1705BPTP4 part number with 1.3-V core supply.
Does the AM1705BPTP3 include an integrated Ethernet PHY?
No, the AM1705BPTP3 integrates only the Ethernet MAC (EMAC) and supports RMII interface - an external 10/100 PHY (e.g., DP83848) is required. The USB 2.0 OTG PHY is fully integrated, but Ethernet PHY functionality is not included on-die.
Can the AM1705BPTP3 run Linux operating systems?
Yes, the AM1705BPTP3 supports Linux distributions including TI's Processor SDK Linux and community-supported Ångström. Its ARM926EJ-S core with MMU, 128KB RAM, and 16KB caches meets minimum requirements for lightweight Linux kernels and user-space applications.
What is the role of the PRUSS in the AM1705BPTP3?
The PRUSS in the AM1705BPTP3 consists of two independent 32-bit programmable real-time units, each with 4KB instruction RAM and 512B data RAM. It handles time-critical I/O tasks - such as PWM synchronization, quadrature encoder counting, or custom protocol bit-banging - without CPU intervention or OS scheduling latency.
Is the AM1705BPTP3 pin-compatible with other Sitara processors like the AM1808?
Yes, the AM1705BPTP3 and AM1808BPTP3 share identical 176-pin PTP packaging, pinout, and ball map - enabling direct PCB footprint reuse. However, differences in peripheral enablement (e.g., SATA in AM1808) require software and minor schematic validation for migration.
AM1705BPTP3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- Sitara™
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- ARM926EJ-S
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 375MHz
- Co-Processors/DSP:
- System Control; CP15
- RAM Controllers:
- SDRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10/100Mbps (1)
- SATA:
- -
- USB:
- USB 2.0 + PHY (1)
- Voltage - I/O:
- 1.8V, 3.3V
- Operating Temperature:
- 0°C ~ 90°C (TJ)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 176-HLQFP (24x24)
- Additional Interfaces:
- I2C, McASP, SPI, MMC/SD, UART
AM1705BPTP3 FAQ
1.How can I place an order for AM1705BPTP3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM1705BPTP3 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 AM1705BPTP3 reliable?
The price and inventory of AM1705BPTP3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM1705BPTP3 is usually 5 days.
3.What payment methods are accepted for AM1705BPTP3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM1705BPTP3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM1705BPTP3?
AM1705BPTP3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM1705BPTP3 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 AM1705BPTP3?
For technical support, including AM1705BPTP3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM1705BPTP3 requirements.
6.How does Aetrix verify that AM1705BPTP3 is sourced from the original manufacturer or authorized distributors?
All AM1705BPTP3 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 AM1705BPTP3 meets industry standards.
7.What is the process for return or replacement of AM1705BPTP3?
All AM1705BPTP3 units undergo pre-shipment inspection (PSI). If there is an issue with AM1705BPTP3, 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 AM1705BPTP3 part is unused and in its original packaging.
Return procedure for AM1705BPTP3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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