The part number "TPIC6B595DW" refers to a specific integrated circuit (IC) manufactured by Texas Instruments. It is a 8-bit shift register with output drivers, often used in applications like driving LED s or other devices that require high current driving capability. The IC uses MOSFET technology to allow for high current output while being controlled by a microcontroller or other logic circuits.
Packaging:
Package Type: SOIC (Small Outline Integrated Circuit) Pin Count: 20 pinsThis device is typically available in the 20-pin SOIC package, which is often used for its small size and ease of surface-mount soldering.
Pinout and Functions (All Pins):
Pin Number Pin Name Pin Function Description 1 QH (MSB) Serial Data Output (Most Significant Bit). This pin outputs the most significant bit of the shifted data from the shift register. 2 QH' (QH Inv) Inverted output of QH. This pin provides the complementary signal to the QH pin. 3 DS (Data) Serial Data Input. This is the input for shifting in data to the shift register. 4 SH_CP (Shift Clock ) Shift Clock Input. This pin receives the clock signal used to shift the bits into the register with each pulse. 5 ST_CP (Storage Clock) Storage Clock Input. This pin controls when the data in the shift register is latched and moved to the output stage. 6 MR (Master Reset) Master Reset Input. When driven low, it resets the shift register, clearing all stored data. 7 Q0 Output Pin. This is the first output from the shift register (Least Significant Bit). 8 Q0' Inverted Output of Q0. It provides the complement of the Q0 signal. 9 Q1 Output Pin. The second bit output of the shift register. 10 Q1' Inverted Output of Q1. It provides the complement of the Q1 signal. 11 Q2 Output Pin. The third bit output of the shift register. 12 Q2' Inverted Output of Q2. It provides the complement of the Q2 signal. 13 Q3 Output Pin. The fourth bit output of the shift register. 14 Q3' Inverted Output of Q3. It provides the complement of the Q3 signal. 15 Q4 Output Pin. The fifth bit output of the shift register. 16 Q4' Inverted Output of Q4. It provides the complement of the Q4 signal. 17 Q5 Output Pin. The sixth bit output of the shift register. 18 Q5' Inverted Output of Q5. It provides the complement of the Q5 signal. 19 Q6 Output Pin. The seventh bit output of the shift register. 20 Q6' Inverted Output of Q6. It provides the complement of the Q6 signal.Circuit Principle:
The TPIC6B595DW operates by shifting data serially into its internal shift register using a clock signal applied to the SHCP (Shift Clock) pin. The data is loaded in bit by bit and is then latched into the output stage when the STCP (Storage Clock) pin is triggered. The device also includes a master reset (MR), which, when activated, clears all data from the register.
This device is primarily used for driving outputs like LEDs in applications where a low-power logic signal is used to control higher power outputs. It is especially useful in applications where a microcontroller with limited pins needs to control multiple devices, such as in LED displays or industrial control systems.
20 Common FAQs:
Q: What is the maximum voltage range for the TPIC6B595DW? A: The TPIC6B595DW can operate within a voltage range of 4.5V to 5.5V.
Q: What type of logic does the TPIC6B595DW use? A: The TPIC6B595DW operates with CMOS logic.
Q: How do I connect the shift register to a microcontroller? A: You can connect the DS (Data) pin to the microcontroller’s output, SHCP and STCP to clock signals, and MR to a reset signal.
Q: Can I drive LEDs directly with the outputs of the TPIC6B595DW? A: Yes, the TPIC6B595DW is designed to drive high-current loads such as LEDs.
Q: How many bits of data can the TPIC6B595DW store? A: It is an 8-bit shift register, so it stores 8 bits of data.
Q: What happens when the MR (Master Reset) pin is pulled low? A: The shift register is reset, and all stored data is cleared.
Q: How many output pins are available on the TPIC6B595DW? A: The TPIC6B595DW provides 8 output pins (Q0 to Q7).
Q: Is the TPIC6B595DW suitable for use in high-frequency applications? A: It is suitable for medium-speed data transfer but may not perform well in extremely high-speed applications.
Q: How can I cascade multiple TPIC6B595DW ICs? A: You can cascade multiple ICs by connecting the QH (MSB) of one IC to the DS (Data) input of the next IC.
Q: Can the TPIC6B595DW be used for serial-to-parallel conversion? A: Yes, the device is designed for serial-to-parallel data conversion.
Q: What is the current driving capability of each output pin? A: Each output pin can drive up to 150 mA, depending on the application.
Q: How do I control the timing of data shifting? A: Data shifting is controlled by applying clock pulses to the SH_CP pin.
Q: How do I latch the shifted data into the output stage? A: To latch the shifted data, you apply a clock pulse to the ST_CP (Storage Clock) pin.
Q: Can the TPIC6B595DW handle inductive loads? A: Yes, it can drive inductive loads, but protection diodes should be used to protect against voltage spikes.
Q: Can I use the TPIC6B595DW for controlling motors? A: It can drive low-power motors, but additional circuitry may be needed for high-power motors.
Q: Is it possible to use the TPIC6B595DW with a 3.3V logic level? A: The TPIC6B595DW is designed for 5V operation, but it may work with 3.3V logic at reduced speeds.
Q: What is the purpose of the QH and QH' pins? A: These pins provide the most significant bit output and its complement from the shift register.
Q: What should I do if I need to reset the shift register without clearing the data? A: Do not activate the MR pin if you only wish to shift the data without resetting.
Q: Is there a thermal protection feature in the TPIC6B595DW? A: The device includes thermal shutdown protection to prevent damage from overheating.
Q: What is the typical application for the TPIC6B595DW? A: Typical applications include LED driving, controlling relays, and other power control systems where serial data is converted to parallel outputs.
The above table and FAQ list provide a detailed explanation of the pin functions, device specifications, and application guidance for the TPIC6B595DW.
