Features: ` CMOS/EEPROM/EPROM Technologies on a Single Device
Mask-ROM Devices for High Volume Production
One-Time-Programmable (OTP) Devices for Low-Volume Production
Reprogrammable EPROM Devices for Prototyping Purposes
` Flexible Operating Features
Low-Power Modes: STANDBY and HALT
Commercial, Industrial, and Automotive Temperature Ranges
Clock Options:
Divide-by-1 (2 MHz5 MHz SYSCLK) Phase-Locked Loop (PLL)
Divide-by-4 (0.5 MHz5 MHz SYSCLK)
Voltage (VCC) 5 V ± 10%
` Internal System Memory Configurations
On-Chip Program Memory Versions
ROM: 4K Bytes or 8K Bytes
EPROM: 8K Bytes
Data EEPROM: 256 Bytes
Static RAM: 256 Bytes Usable as Registers
` Two 16-Bit General-Purpose Timers
Software Configurable as
Two 16-Bit Event Counters, or
Two 16-Bit Pulse Accumulators, or
Three 16-Bit Input Capture Functions, or
Four Compare Registers, or
Two Self-Contained
Pulse-Width-Modulation (PWM) Functions
` Serial Communications Interface 1 (SCI1)
Asynchronous and Isosynchronous† Modes
Full Duplex, Double Buffered RX and TX
Two Multiprocessor Communications Formats
` CMOS/Package/TTL Compatible I/O Pins
All Peripheral Function Pins Software Configurable for Digital I/O
40-Pin Plastic and Ceramic Dual-In-Line Packages/27 Bidirectional, 5 Input Pins
44-Pin Plastic and Ceramic Leaded Chip Carrier Packages/27 Bidirectional, 9 Input Pins
` On-Chip 24-Bit Watchdog Timer
` Eight-Bit ADC1
Four Channels in 40-Pin Packages
Eight Channels in 44-Pin Packages
` Flexible Interrupt Handling
` TMS370 Series Compatibility
` Workstation/PC-Based Development System
C Compiler Support
Real-Time In-Circuit Emulation
C Source Debug
Extensive Breakpoint/Trace Capability
Software Performance Analysis
Multi-Window User Interface
EEPROM/EPROM ProgrammingPinout
SpecificationsSupply voltage, VCC, VCC3 (see Note 1) . . . . . . . . . . . . . . . . .. 0.6 V to 7 V
Input voltage range, All pins except MC . . . . . . . . . . . . . . . . . . 0.6 V to 7 V
MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.6 V to 14 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . ±20 mA
Continuous output current per buffer, IO (VO = 0 to VCC)‡ . . . . . . . .. ±10 mA
Maximum ICC current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 mA
Maximum ISS current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 mA
Continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 W
Operating free-air temperature, TA: L version . . . . . . . . . . . . . . 0°C to 70°C
A version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to 85°C
T version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to 105°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
‡ Electrical characteristics are specified with all output buffers loaded with the specified IO current. Exceeding the specified IO current in any buffer can affect the levels on other buffers.
NOTE 1: Unless otherwise noted, all voltage values are with respect to VSS.
DescriptionThe TMS370C040A, TMS370C042A, TMS370C340A, TMS370C342A, TMS370C742A, and SE370C742A devices are members of the TMS370 family of single-chip 8-bit microcontrollers. Unless otherwise noted, the term TMS370Cx4x refers to these devices. TMS370 family provides cost-effective real-time system control through integration of advanced peripheral function modules and various on-chip memory configurations.
The TMS370Cx4x family is implemented using high-performance silicon-gate CMOS EPROM and EEPROM technology. The low-operating power, wide-operating temperature range, and noise immunity of CMOS technology coupled with the high performance and extensive on-chip peripheral functions make the TMS370Cx4x devices attractive in system designs for automotive electronics, industrial motor, computer peripheral control, telecommunications, and consumer applications.
The TMS370Cx4x devices contain the following on-chip peripheral modules:
·Eight-channel (for 44 pin device) or four-channel (for 40-pin device) 8-bit analog-to-digital converter 1 (ADC1)
·Serial communications interface 1 (SCI1)
·Two 16-bit general-purpose timers (one with an 8-bit prescaler)
TMS370Cx4x Data Sheet
