| Part Number | P89LPC935FA,129 | P89LPC938FA,129 | 
|---|---|---|
| Manufacturer | NXP USA Inc. | NXP USA Inc. | 
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Core Processor | 8051 | 8051 | 
| Core Size | 8-Bit | 8-Bit | 
| Speed | 12MHz | 18MHz | 
| Connectivity | I²C, SPI, UART/USART | I²C, SPI, UART/USART | 
| Peripherals | Brown-out Detect/Reset, LED, POR, PWM, WDT | Brown-out Detect/Reset, LED, POR, PWM, WDT | 
| Number of I/O | 26 | 26 | 
| Program Memory Size | 8KB (8K x 8) | 8KB (8K x 8) | 
| Program Memory Type | Flash | Flash | 
| EEPROM Size | 512 x 8 | 512 x 8 | 
| RAM Size | 768 x 8 | 768 x 8 | 
| Voltage - Supply (Vcc/Vdd) | 2.4V ~ 3.6V | 2.4V ~ 3.6V | 
| Data Converters | A/D 8x8b; D/A 2x8b | A/D 8x10b | 
| Oscillator Type | Internal | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 28-LCC (J-Lead) | 28-LCC (J-Lead) | 
| Supplier Device Package | 28-PLCC (11.48x11.48) | 28-PLCC (11.48x11.48) |