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Texas Instruments TMS370C792FNT
- Part No.:
- TMS370C792FNT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
TMS370C792FNT.pdf
- Description:
- 8-BIT, OTPROM, TMS370 CPU, 5MHZ
- Quantity:
- Payment:
- Shipping:
Inventory:1,063
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Product details
Overview
TMS370C792FNT from Texas Instruments is a one-time-programmable (OTP) 8-bit microcontroller with 8K-byte EPROM program memory, 256-byte data EEPROM, 128-byte RAM, and integrated 15-channel 8-bit ADC3 - designed for automotive and industrial motor control applications requiring robust in-circuit programmability and low-power operation.
For engineers reviewing the TMS370C792FNT datasheet, TMS370C792FNT pinout, TMS370C792FNT application, or TMS370C792FNT equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for production design-in and legacy system replacement.
Technical Context
The TMS370C792FNT implements a register-to-register 8-bit CPU architecture with 128 general-purpose registers and 14 addressing modes, eliminating accumulator bottlenecks. It supports dual clock options: divide-by-4 (0.5–5 MHz SYSCLK) and PLL-based divide-by-1 (2–5 MHz SYSCLK), with VCC = 5 V ±10%.
It integrates a 24-bit watchdog timer (standard mode), a software-configurable 16-bit general-purpose timer with 8-bit prescaler (enabling PWM, input capture, event counting), and dedicated ADC3 analog inputs (AN0–AN14) with separate VCC3/VSS3 supply rails for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit register-to-register CPU with 128 general-purpose registers and 14 addressing modes - enables direct register arithmetic without accumulator dependency. |
| Program Memory | 8K-byte OTP EPROM (6000h–7FFFh) - supports in-circuit programming via 13 V on MC pin; no external VPP required. |
| Data Memory | 256-byte data EEPROM (1F00h–1FFFh) with bit/byte/block erase and internal charge pump - retains data during power-off; write-protected unless MC = 12 V. |
| Analog Input Channels | 15-channel 8-bit ADC3 (AN0–AN14) with independent VCC3/VSS3 supply - isolates analog reference from digital noise for stable conversion in motor control. |
| Timer System | 16-bit general-purpose timer + 8-bit prescaler → 24-bit real-time capability; configurable as PWM, input capture, event counter, or pulse accumulator - supports closed-loop timing functions. |
| Power Management | STANDBY (oscillator + timer active) and HALT (all activity stopped) modes - preserves RAM and peripheral configuration while reducing current draw in battery-sensitive systems. |
| Operating Voltage | 5 V ±10% (VCC); dedicated 5 V analog supply (VCC3/VSS3) - ensures stable ADC3 performance across temperature and load variation. |
Pinout & Package
Package: 44-pin plastic leaded chip carrier (PLCC), FN variant - surface-mount compatible with standard PLCC sockets and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Port A bidirectional I/O | General-purpose digital I/O; all pins software-configurable; no alternate peripheral functions assigned. |
| D3–D7 | Port D bidirectional I/O | D3 doubles as SYSCLK output; remaining pins are pure digital I/O - enables clock distribution or GPIO expansion. |
| AN0–AN14 | ADC3 analog inputs | 15 dedicated analog input pins; AN6/AN7 configurable as positive reference - supports multi-sensor monitoring with shared reference. |
| T1IC/CR, T1PWM, T1EVT | Timer1 functional I/O | Input capture/reset, PWM output, and external event input - enables precise timing control for motor phase detection or PWM generation. |
| RESET | System reset I/O | Bidirectional: input triggers cold start; open-drain output asserts during watchdog/oscillator fault - allows synchronous reset of external peripherals. |
| MC | Mode control input | Enables EEPROM/EPROM write-protection override when 12 V applied - prevents accidental reprogramming in field-deployed units. |
| XTAL1/XTAL2/CLKIN | Oscillator interface | XTAL1 (output), XTAL2/CLKIN (input) - supports crystal (1–5 MHz) or external clock source; PLL option enables higher SYSCLK stability. |
| VCC / VSS | Digital power rails | 5 V ±10% digital supply and ground - powers CPU, timers, and digital I/O; decoupling required per TI layout guidelines. |
| VCC3 / VSS3 | Analog power rails | Dedicated 5 V analog supply and ground for ADC3 - critical for achieving full 8-bit linearity and noise immunity in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| OTP EPROM with in-circuit programming | 8K-byte program memory programmed via 13 V on MC pin - eliminates need for UV erasers or socket programmers in low-volume production. |
| Separate analog/digital power domains | VCC3/VSS3 rails isolate ADC3 from digital switching noise - maintains ≥7.5 effective bits across automotive temperature range (–40°C to +125°C). |
| Configurable low-power modes | STANDBY (timer active) and HALT (full stop) modes - reduces quiescent current to <10 µA while preserving RAM and register state. |
| Software-defined peripheral pin mapping | All peripheral function pins (T1IC/CR, T1PWM, etc.) double as general-purpose I/O - maximizes pin utility without hardware redesign. |
| Watchdog with fault-source identification | 24-bit watchdog timer with OSC FLT FLAG, COLD START, and WD OVRFL INT FLAG bits - enables firmware diagnostics after reset events. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Monitoring throttle position, coolant temperature, and crankshaft speed in 16-bit embedded engine management systems. IC Role / Device Role / Timing Role: Central controller executing real-time fuel injection timing, spark advance calculation, and CAN bus message handling via external transceiver. Use Value: Integrated 15-channel ADC3 with VCC3 isolation delivers stable sensor readings under EMI-rich under-hood conditions; OTP EPROM ensures firmware security against unauthorized modification. |
Use Scenario: Closed-loop speed and current regulation in 3-phase BLDC motor drives for HVAC and pumping systems. IC Role / Device Role / Timing Role: PWM generator and current-sense ADC coordinator - synchronizing gate driver signals with rotor position feedback. Use Value: Timer1's PWM output and input capture enable precise commutation timing; STANDBY mode supports rapid wake-up from sleep during transient load changes. |
| Telecom Power Supply Supervisor | Consumer Appliance Control Board |
Use Scenario: Monitoring +12 V, +5 V, and –5 V rails in telecom shelf power modules with overvoltage/undervoltage alarms. IC Role / Device Role / Timing Role: Analog supervisor and fault-logging controller - sampling rail voltages, triggering shutdown sequences, and storing event timestamps in EEPROM. Use Value: 256-byte data EEPROM retains fault logs across power cycles; dedicated VCC3/VSS3 ensures accurate voltage measurement despite digital noise from switching regulators. |
Use Scenario: Managing user interface, temperature sensing, and motor sequencing in premium washing machines and dishwashers. IC Role / Device Role / Timing Role: Main system controller coordinating display updates, heater control, water valve actuation, and spin cycle timing. Use Value: OTP EPROM provides cost-effective firmware lock for mass production; HALT mode extends standby battery life in smart appliance remote-wake features. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS370C090AFN | 4K-byte mask-ROM program memory instead of 8K-byte OTP EPROM; identical pinout, memory map, and peripheral set. | Suitable only for high-volume, fixed-firmware deployments where mask ROM economics outweigh flexibility. | Select when firmware is finalized and production volume exceeds 50k units/year - avoids OTP programming step but requires mask revision for updates. |
| SE370C792FZ | Windowed ceramic CLCC package (FZ) with reprogrammable EPROM; same 8K-byte program memory and functional spec as TMS370C792FNT. | Targeted at prototyping and pre-production validation - UV-erasable for iterative firmware development. | Choose for design-in phase where frequent code updates are needed; not qualified for automotive/industrial long-term deployment due to window seal reliability concerns. |
Compared with TMS370C090AFN and SE370C792FZ, the TMS370C792FNT uniquely balances production readiness (OTP security), field-programmability (13 V MC override), and automotive-grade packaging (PLCC-FN) - making it optimal for low-to-mid volume, safety-critical embedded control where firmware updates must be controlled but not impossible.
Availability
TMS370C792FNT is available at Aetrix Electronics and suitable for automotive engine control, industrial motor drive, telecom power supervision, and consumer appliance control applications requiring stable component supply and long-lifecycle support.
Supply support for TMS370C792FNT 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 for industrial, automotive, and communications markets.
The TMS370Cx9x product line was engineered for cost-effective, real-time system control in harsh environments - integrating memory, analog peripherals, and low-power modes into single-chip solutions for motor control, sensor interfacing, and power management.
FAQ
What is the maximum operating frequency of the TMS370C792FNT?
The TMS370C792FNT supports two clock configurations: divide-by-4 mode (0.5–5 MHz SYSCLK) and PLL-based divide-by-1 mode (2–5 MHz SYSCLK). Its maximum guaranteed SYSCLK frequency is 5 MHz, corresponding to 1.25 MIPS at divide-by-4 or 5 MIPS at divide-by-1 - validated across commercial, industrial, and automotive temperature ranges.
Does the TMS370C792FNT support in-circuit programming of its EPROM?
Yes, the TMS370C792FNT supports in-circuit programming of its 8K-byte OTP EPROM. Programming requires applying 13 V to the MC pin while holding RESET low, then issuing commands via the EPCTL register (P01Ch). No external VPP supply or UV erasure is needed - enabling field firmware updates with proper voltage control circuitry.
How many analog input channels does the TMS370C792FNT have, and what is their resolution?
The TMS370C792FNT integrates ADC3 - a 15-channel, 8-bit analog-to-digital converter. Inputs AN0–AN14 are dedicated analog pins; AN6 and AN7 can be configured as positive reference inputs. The converter operates with ±1 LSB integral nonlinearity and is specified for full 8-bit accuracy across –40°C to +125°C when using VCC3/VSS3 rails.
What low-power modes are available on the TMS370C792FNT, and how do they differ?
The TMS370C792FNT offers STANDBY and HALT modes. In STANDBY, the CPU halts but the oscillator and 16-bit timer remain active - ideal for periodic wake-up tasks. In HALT, all clocks stop except RAM retention - reducing current to <10 µA. Both modes preserve RAM contents, peripheral configuration, and register states for seamless resume.
Is the TMS370C792FNT pin-compatible with other TMS370Cx9x devices?
Yes, the TMS370C792FNT in FN (44-pin PLCC) package is pin-compatible with TMS370C090AFN and SE370C792FZ in the same package variant. All share identical pin assignments, electrical characteristics, and memory maps - allowing drop-in replacement where OTP vs. ROM vs. windowed EPROM functionality aligns with the application's firmware update requirements.
TMS370C792FNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Series:
- TMS370
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
TMS370C792FNT FAQ
1.How can I place an order for TMS370C792FNT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMS370C792FNT 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 TMS370C792FNT reliable?
The price and inventory of TMS370C792FNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMS370C792FNT is usually 5 days.
3.What payment methods are accepted for TMS370C792FNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMS370C792FNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMS370C792FNT?
TMS370C792FNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMS370C792FNT 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 TMS370C792FNT?
For technical support, including TMS370C792FNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMS370C792FNT requirements.
6.How does Aetrix verify that TMS370C792FNT is sourced from the original manufacturer or authorized distributors?
All TMS370C792FNT 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 TMS370C792FNT meets industry standards.
7.What is the process for return or replacement of TMS370C792FNT?
All TMS370C792FNT units undergo pre-shipment inspection (PSI). If there is an issue with TMS370C792FNT, 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 TMS370C792FNT part is unused and in its original packaging.
Return procedure for TMS370C792FNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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