8-bit CISC microcontroller featuring an 80C51 core, 4KB Flash program memory, and 256B RAM. Operates at up to 18 MHz with 26 programmable I/Os and 5 timers. Supports I2C, SPI, and UART interfaces, with a single ADC offering 4 channels. This surface-mount device is housed in a 28-pin TSSOP package with gull-wing leads, measuring 9.8mm x 4.5mm x 0.95mm, and operates from 2.5V to 5.5V across a -40°C to 85°C temperature range.
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| Basic Package Type | Lead-Frame SMT |
| Package Family Name | SOP |
| Package/Case | TSSOP |
| Package Description | Thin Shrink Small Outline Package |
| Lead Shape | Gull-wing |
| Pin Count | 28 |
| PCB | 28 |
| Package Length (mm) | 9.8(Max) |
| Package Width (mm) | 4.5(Max) |
| Package Height (mm) | 0.95(Max) |
| Seated Plane Height (mm) | 1.1(Max) |
| Pin Pitch (mm) | 0.65 |
| Package Material | Plastic |
| Mounting | Surface Mount |
| Family Name | P89 |
| Data Bus Width | 8bit |
| Instruction Set Architecture | CISC |
| Maximum Clock Rate | 18MHz |
| Maximum CPU Frequency | 18MHz |
| Device Core | 80C51 |
| Program Memory Type | Flash |
| Program Memory Size | 4KB |
| RAM Size | 256B |
| Number of Programmable I/Os | 26 |
| Core Architecture | 8051 |
| Programmability | Yes |
| Number of Timers | 5 |
| Interface Type | I2C/SPI/UART |
| CAN | 0 |
| I2C | 1 |
| SPI | 1 |
| Ethernet | 0 |
| UART | 1 |
| USART | 0 |
| USB | 0 |
| I2S | 0 |
| Max Operating Supply Voltage | 5.5V |
| Min Operating Temperature | -40°C |
| Max Operating Temperature | 85°C |
| ADC Channels | 4 |
| Number of ADCs | Single |
| Cage Code | H1R01 |
| EU RoHS | Yes |
| HTS Code | 8542310001 |
| Schedule B | 8542310000 |
| ECCN | EAR99 |
| Automotive | No |
| AEC Qualified | No |
| PPAP | No |
| Radiation Hardening | No |
| RoHS Versions | 2011/65/EU, 2015/863 |
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