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Texas Instruments AM1705DPTPD4
- Part No.:
- AM1705DPTPD4
- Manufacturer:
- Texas Instruments
- Category:
- Microprocessors
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
AM1705DPTPD4.pdf
- Description:
- IC MPU SITARA 456MHZ 176HLQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,922
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Product details
Overview
AM1705DPTPD4 from Texas Instruments is a 375-MHz ARM926EJ-S™ microprocessor with 16KB instruction cache, 16KB data cache, 128KB on-chip RAM, and integrated peripherals including 10/100 Mbps Ethernet MAC (RMII), three UARTs (one with RTS/CTS), two McASPs, USB 2.0 OTG with PHY, and PRUSS dual-core subsystem - deployed in industrial automation and portable data terminals.
For engineers reviewing the AM1705DPTPD4 datasheet, AM1705DPTPD4 pinout, AM1705DPTPD4 application, or AM1705DPTPD4 equivalent, key selection considerations include ARM926EJ-S core frequency (375 MHz @ 1.2 V), 176-pin HLQFP package with 0.5-mm pitch, EMIFA/EMIFB memory interface support, and real-time programmable I/O via PRUSS.
Technical Context
The AM1705DPTPD4 implements a full-featured ARM926EJ-S RISC core with MMU, Jazelle® Java acceleration, and Embedded ICE-RT™ debug support. It integrates dual external memory interfaces: EMIFA for NAND/NOR/Flash and EMIFB for 16-bit SDRAM up to 128 MB, plus dedicated AHB bus architecture for high-bandwidth peripheral access.
Its programmable real-time subsystem (PRUSS) contains two independent 32-bit RISC PRU cores, each with 4KB instruction RAM and 512B data RAM, clock-gated under a single PSC domain and supporting deterministic low-latency I/O control - coexisting with ARM subsystem via shared memory and switched central resource (SCR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM926EJ-S at 375 MHz (1.2 V nominal), supporting ARMv5TEJ, Thumb®, Jazelle®, and MMU-based virtual memory management |
| On-Chip Memory | 128KB SRAM + 64KB ROM + 16KB I-Cache + 16KB D-Cache + 8KB vector RAM - enables boot-from-ROM and cache-coherent real-time execution |
| External Memory Interfaces | EMIFA: 8-bit async (NAND/NOR/Flash); EMIFB: 16-bit SDRAM up to 128 MB - supports mixed legacy and high-speed memory architectures |
| Connectivity Peripherals | 1× 10/100 Mbps EMAC (RMII), 1× USB 2.0 OTG (full-/low-speed host/client), 2× I²C, 2× SPI, 3× UART (UART0 with RTS/CTS) |
| Real-Time I/O Subsystem | PRUSS with two 32-bit PRU cores, 4KB IRAM + 512B DRAM per core, dedicated interrupt controller, and software-disablable power gating |
| Audio & Timing | 2× McASP (28 serial pins, TDM/I²S support), 3× eHRPWM (6 single/dual-edge outputs + dead-band), 3× eCAP, 2× eQEP - suitable for motor control and audio processing |
| Package | 176-pin HLQFP (PTP suffix), 24.00 mm × 24.00 mm body, 0.5-mm pitch, PowerPAD™ thermal pad - requires controlled reflow and thermal vias for 375-MHz operation |
Pinout & Package
AM1705DPTPD4 uses a 176-pin HLQFP (PowerPAD™) package with 0.5-mm pitch and exposed thermal pad (pin 177). Pin functions are multiplexed across 8 GPIO banks and dedicated peripheral signals; all I/Os operate at 3.3-V LVCMOS except USB analog supply pins (USB0_VDDA12/18/33) and oscillator inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1–176 (e.g., AXR1[0]/GP4[0]) | Multiplexed GPIO or peripheral signal | Configurable as general-purpose I/O or function-specific interface (e.g., McASP serial data, eHRPWM output, UART RX/TX) |
| Pin 137 (USB0_DP), Pin 138 (USB0_DM) | Differential USB 2.0 data pair | Integrated full-speed PHY; requires 90-Ω differential impedance routing and ESD protection |
| Pin 111–116 (RMII_TXD[0:1], RMII_RXD[0:1], RMII_TXEN, RMII_CRS_DV) | Reduced Media Independent Interface | Direct connection to 10/100 Mbps Ethernet PHY without MII glue logic; supports half/full-duplex operation |
| Pin 143 (OSCIN), Pin 145 (OSCOUT) | Crystal oscillator input/output | Supports 24.576 MHz crystal for USB/EMAC timing; internal PLL generates core/system clocks |
| Pin 177 (Thermal Pad) | Exposed thermal ground pad | Must be soldered to PCB ground plane with ≥6 thermal vias for junction temperature control at 375 MHz |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S with MMU and caches | Enables Linux/RTOS deployment with memory protection, virtual addressing, and deterministic cache behavior for real-time tasks |
| Dual external memory interfaces | EMIFA handles legacy parallel Flash/NAND; EMIFB drives high-bandwidth SDRAM - eliminates need for external memory controllers |
| Programmable Real-Time Unit Subsystem (PRUSS) | Two autonomous 32-bit RISC cores offload time-critical I/O (e.g., PWM generation, encoder counting) from ARM, reducing latency and CPU load |
| Integrated USB 2.0 OTG PHY | Eliminates external transceiver; supports device/host modes with endpoint 0–4 (control/bulk/interrupt/isochronous) - simplifies USB connectivity |
| Three enhanced capture (eCAP) modules | Each configurable as 32-bit capture input or auxiliary PWM output - supports precise timestamping of encoder edges or pulse-width modulation |
| Two multichannel audio serial ports (McASP) | 28 serializers, FIFO buffers, and TDM/I²S support - enables simultaneous audio streaming to multiple codecs or DSPs without CPU intervention |
Applications
| Industrial PLC Controller | Portable Data Terminal |
|---|---|
Use Scenario: Compact programmable logic controller handling sensor I/O, motion control, and HMI communication over EtherNet/IP. IC Role / Device Role / Timing Role: Central processor executing real-time control loops via PRUSS, managing EtherNet/IP stack on EMAC, and interfacing with fieldbus peripherals via UART/SPI. Use Value: Single-chip integration of ARM application processing and deterministic I/O control reduces BOM count and board area versus dual-processor solutions. |
Use Scenario: Rugged handheld terminal scanning barcodes, communicating via Wi-Fi/Ethernet, and running embedded Linux UI. IC Role / Device Role / Timing Role: Main application processor running Linux, driving display/audio via McASP, managing secure SD card storage, and enabling USB host for peripheral attachment. Use Value: On-chip 128KB RAM and boot-from-ROM reduce external memory requirements; USB OTG allows firmware updates via flash drive. |
| Test & Measurement Instrument | Home Automation Gateway |
Use Scenario: Benchtop oscilloscope capturing analog waveforms via ADC interface and displaying results on LCD with touch UI. IC Role / Device Role / Timing Role: Host processor for data acquisition firmware, managing high-speed SPI ADC reads, buffering samples in on-chip RAM, and rendering UI via framebuffer. Use Value: 16KB instruction/data caches minimize instruction fetch stalls during real-time sampling; eHRPWM outputs generate precise trigger signals. |
Use Scenario: Smart home hub aggregating Zigbee/Z-Wave sensors, exposing REST API over Ethernet, and controlling lighting via PWM dimming. IC Role / Device Role / Timing Role: Application processor running OpenWrt, managing concurrent network stacks (TCP/IP, MQTT), and generating dimming signals via eHRPWM outputs. Use Value: PRUSS handles protocol translation between wireless radios and Ethernet without ARM context switching; integrated EMAC ensures low-latency LAN response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM1808ZWT | 456-MHz ARM926EJ-S, same 176-pin PTP package, adds hardware crypto accelerator and SATA interface | Better suited for encrypted data logging or NAS-adjacent edge storage; higher core voltage (1.3 V) increases thermal demand | Select when cryptographic acceleration or SATA host capability is required; otherwise AM1705DPTPD4 offers lower power and cost |
| AM3352BZCZ100 | 1-GHz ARM Cortex-A8, 256KB L2 cache, PRU-ICSS (enhanced PRU), 365-pin ZCZ package - not pin-compatible | Targets higher-performance UIs, video decode, and multi-protocol industrial gateways; requires PCB redesign | Choose for future-proofing with Cortex-A8 ecosystem and PRU-ICSS; AM1705DPTPD4 remains optimal for cost-sensitive, thermally constrained ARM9 designs |
Compared with AM1808ZWT and AM3352BZCZ100, AM1705DPTPD4 delivers proven 375-MHz ARM9 performance in a thermally efficient 176-pin package, prioritizing deterministic real-time I/O (via PRUSS) and minimal BOM over raw speed or advanced accelerators - ideal for established industrial control platforms.
Availability
AM1705DPTPD4 is available at Aetrix Electronics and suitable for industrial automation, portable data terminals, and test and measurement equipment requiring stable component supply and long-term manufacturing continuity.
Supply support for AM1705DPTPD4 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 focused on analog, embedded processing, and connectivity technologies, serving industrial, automotive, and communications markets with high-reliability silicon and comprehensive design resources.
The AM1705DPTPD4 belongs to TI's Sitara™ ARM processor family, designed specifically for cost-optimized, real-time embedded applications where deterministic I/O, Linux readiness, and thermal efficiency outweigh peak CPU throughput.
FAQ
What is the maximum operating frequency of the AM1705DPTPD4?
The AM1705DPTPD4 operates at a maximum frequency of 375 MHz when supplied with a nominal 1.2-V core voltage. This frequency is specified under recommended operating conditions and validated across commercial and industrial temperature ranges. The AM1705DPTPD4 does not support the 456-MHz variant - that requires a different part number (e.g., AM1705DPTRD4) and 1.3-V core supply.
Does the AM1705DPTPD4 include an integrated USB PHY?
Yes, the AM1705DPTPD4 integrates a full-speed USB 2.0 OTG PHY on-die, accessible via pins USB0_DP (137) and USB0_DM (138). This eliminates the need for an external transceiver and supports both device and host roles with endpoints 0–4. The PHY is compliant with USB 2.0 specifications and requires proper 90-Ω differential routing and ESD protection per the AM1705DPTPD4 layout guidelines.
How is real-time I/O handled on the AM1705DPTPD4?
The AM1705DPTPD4 uses its Programmable Real-Time Unit Subsystem (PRUSS) - two independent 32-bit RISC PRU cores - to handle deterministic, low-latency I/O tasks such as PWM generation, quadrature encoder counting, and custom protocol bridging. Each PRU has dedicated 4KB instruction RAM and 512B data RAM, runs autonomously from the ARM core, and communicates via shared memory and interrupts - enabling sub-microsecond response times without ARM scheduling overhead.
What memory interfaces does the AM1705DPTPD4 support?
The AM1705DPTPD4 supports two distinct external memory interfaces: EMIFA (asynchronous 8-bit bus for NAND/NOR/Flash) and EMIFB (16-bit SDRAM interface supporting up to 128 MB). It also includes 128KB of on-chip SRAM, 64KB ROM, and 16KB each of instruction and data cache. No DDR2/DDR3 or LPDDR support is provided - EMIFB is limited to single-data-rate SDRAM.
Is the AM1705DPTPD4 pin-compatible with other Sitara processors?
No, the AM1705DPTPD4 is not pin-compatible with other Sitara processors such as the AM335x or AM437x families. Its 176-pin HLQFP (PTP) package and signal mapping are unique to the AM17xx series. While functional similarities exist (e.g., PRUSS, EMAC, McASP), migration to newer Sitara devices requires PCB redesign due to differing pin counts, package dimensions, and I/O assignments - confirmed by TI's device compatibility documentation.
AM1705DPTPD4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- Sitara™
- Packaging:
- Tray
- Product Status:
- Active
- Core Processor:
- ARM926EJ-S
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 456MHz
- 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:
- -40°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
AM1705DPTPD4 FAQ
1.How can I place an order for AM1705DPTPD4 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM1705DPTPD4 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 AM1705DPTPD4 reliable?
The price and inventory of AM1705DPTPD4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM1705DPTPD4 is usually 5 days.
3.What payment methods are accepted for AM1705DPTPD4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM1705DPTPD4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM1705DPTPD4?
AM1705DPTPD4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM1705DPTPD4 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 AM1705DPTPD4?
For technical support, including AM1705DPTPD4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM1705DPTPD4 requirements.
6.How does Aetrix verify that AM1705DPTPD4 is sourced from the original manufacturer or authorized distributors?
All AM1705DPTPD4 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 AM1705DPTPD4 meets industry standards.
7.What is the process for return or replacement of AM1705DPTPD4?
All AM1705DPTPD4 units undergo pre-shipment inspection (PSI). If there is an issue with AM1705DPTPD4, 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 AM1705DPTPD4 part is unused and in its original packaging.
Return procedure for AM1705DPTPD4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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