Overview
The STP08DP05 is a monolithic, low voltage, low current power 8-bit shift register designed specifically for LED panel displays. It features a 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. The device is equipped with eight regulated current sources, each capable of providing a constant current of 5-100 mA to drive LEDs. It is backward compatible with the STP8C/L596 and extends its functionality by including open and short detection on the outputs. This detection capability checks for short to GND, short to V_O, or open line conditions without increasing the pin count, using a dedicated logic sequence on the output enable and latch pins (DM1 and DM2). The output current can be adjusted via an external resistor, and the LED brightness can be controlled from 0% to 100% using the OE/DM2 pin.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| VDD Supply Voltage | 3.0 | - | 5.5 | V |
| VO Output Voltage | -0.5 | - | 20 | V |
| IO Output Current | 5 | - | 100 | mA |
| fCLK Clock Frequency | - | - | 30 | MHz |
| TOPR Operating Temperature Range | -40 | - | 125 | °C |
| TSTG Storage Temperature Range | -55 | - | 150 | °C |
| RthJA Thermal Resistance Junction-Ambient (TSSOP-16 exposed pad) | - | - | 37.5 | °C/W |
Key Features
- Low voltage power supply down to 3 V
- 8 constant current output channels
- Adjustable output current through external resistor
- Short and open output error detection
- Serial data IN/parallel data OUT
- 3.3 V micro driver-able
- Output current: 5-100 mA
- 20 V output driving capability
- High clock frequency of 30 MHz
- ESD protection 2.5 kV HBM, 200 V MM
- High thermal efficiency TSSOP exposed pad package
Applications
The STP08DP05 is primarily designed for LED panel displays, making it suitable for various applications such as:
- LED signage and billboards
- Automotive LED displays
- Industrial control panels
- Consumer electronics with LED indicators
- Any system requiring multiple LED outputs with current regulation and error detection
Q & A
- What is the minimum supply voltage for the STP08DP05?
The minimum supply voltage is 3.0 V.
- How many constant current output channels does the STP08DP05 have?
The STP08DP05 has 8 constant current output channels.
- What is the range of adjustable output current for the STP08DP05?
The output current can be adjusted from 5 mA to 100 mA using an external resistor.
- Does the STP08DP05 have built-in error detection?
Yes, it has built-in short and open output error detection.
- What is the maximum clock frequency of the STP08DP05?
The maximum clock frequency is 30 MHz.
- What is the thermal resistance of the TSSOP-16 exposed pad package?
The thermal resistance of the TSSOP-16 exposed pad package is 37.5 °C/W.
- How does the error detection mode work on the STP08DP05?
The error detection mode checks for short to GND, short to V_O, or open line conditions using a dedicated logic sequence on the output enable and latch pins (DM1 and DM2).
- Can the brightness of the LEDs be controlled using the STP08DP05?
Yes, the LED brightness can be controlled from 0% to 100% using the OE/DM2 pin.
- What is the maximum output voltage driving capability of the STP08DP05?
The STP08DP05 guarantees a 20 V output driving capability.
- Is the STP08DP05 backward compatible with other STMicroelectronics devices?
Yes, it is backward compatible with the STP8C/L596 in terms of functionality and footprint.
