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| PartNumber | ST90R158Q6 | ST90R26ZB6R | ST90R28ZB1R |
| Description | 8-bit Microcontrollers - MCU ROMless SPI/2xSCI | ||
| Manufacturer | STMicroelectronics | - | - |
| Product Category | 8-bit Microcontrollers - MCU | - | - |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | PQFP-80 | - | - |
| Series | ST90E158 | - | - |
| Core | ST9 | - | - |
| Data Bus Width | 8 bit/16 bit | - | - |
| Maximum Clock Frequency | 24 MHz | - | - |
| Program Memory Size | 0 B | - | - |
| Data RAM Size | 2 kB | - | - |
| ADC Resolution | 8 bit | - | - |
| Number of I/Os | 67 I/O | - | - |
| Operating Supply Voltage | 2.7 V to 3.3 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tray | - | - |
| Height | 2.7 mm | - | - |
| Length | 20 mm | - | - |
| Program Memory Type | ROMLess | - | - |
| Width | 14 mm | - | - |
| Brand | STMicroelectronics | - | - |
| Data ROM Type | OTP EPROM | - | - |
| Interface Type | I2C, SCI | - | - |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 8 | - | - |
| Number of Timers/Counters | 2 Timer | - | - |
| Product Type | 8-bit Microcontrollers - MCU | - | - |
| Factory Pack Quantity | 396 | - | - |
| Subcategory | Microcontrollers - MCU | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 4.5 V | - | - |
| Unit Weight | 0.032999 oz | - | - |