| RAM (Bytes) | 128 |
| F.max (MHz) | 60 |
| Vcc (V) | 2.7-5.5 |
| I/O Pins | 32 |
| UART | 1 |
| 16-bit Timers | 2 |
| Packages | PDIP 40 LQFP 44 PLCC 44 |
| Pb-Free Packages | PDIP 40 LQFP 44 PLCC 44 |
TS80C31X2 is high performance CMOS and ROMless versions of the 80C51 CMOS single chip 8-bit microcontroller. The TS80C31X2 retains all features of the TSC80C31 with 128 bytes of internal RAM, a 5-source, 4 priority level interrupt system, an on-chip oscilator and two timer/counters. In addition, the TS80C31X2 has a dual data pointer, a more versatile serial channel that facilitates multiprocessor communication (EUART) and a X2 speed improvement mechanism.
| Part Number | Memory size | Supply Voltage | Temperature Range | Max Frequency | Package | Packing |
| AT80C31X2-3CSUM | ROMLess | 5V ±10% | Industrial Green | 40 MHz (20 MHz X2) | PDIL40 | Stick |
| AT80C31X2-SLSUM | Romless | 5V ±10% | Industrial Green | 40 MHz (20 MHz X2) | PLCC44 | Stick |
| AT80C31X2-RLTUM | Romless | 5V ±10% | Industrial Green | 40 MHz (20 MHz X2) | VQFP44 | Tray |
| AT80C31X2-3CSUL | Romless | 2.7 to 5.5V | Industrial Green | 30 MHz (20 MHz X2) | PDIL40 | Stick |
| AT80C31X2-SLSUL | Romless | 2.7 to 5.5V | Industrial Green | 30 MHz (20 MHz X2) | PLCC44 | Stick |
| AT80C31X2-RLTUL | ROMLess | 2.7 to 5.5V | Industrial Green | 30 MHz (20 MHz X2) | VQFP44 | Tray |
| AT80C31X2-3CSUV | ROMLess | 5V ±10% | Industrial Green | 60 MHz (20 MHz X2) | PDIL40 | Stick |
| AT80C31X2-SLSUV | ROMLess | 5V ±10% | Industrial Green | 60 MHz (20 MHz X2) | PLCC44 | Stick |
| AT80C31X2-RLTUV | Romless | 5V ±10% | Industrial Green | 60 MHz (20 MHz X2) | VQFP44 | Tray |
