TM1640 16-Digit Seven Segment Display Driver IC SOP-28

TM1640 16-Digit Seven Segment Display Driver IC SOP-28 is a sophisticated and efficient LED drive control circuit that integrates a digital interface, data latches, and LED high-voltage drive components into a single compact package. Specifically engineered for large-scale display requirements, this IC can drive up to 16 digits of common cathode seven-segment LED displays or a 16 by 8 dot matrix. Furthermore, it utilizes a simple two-wire serial interface, which significantly reduces the number of GPIO pins required on your host microcontroller. Consequently, designers can implement complex visual interfaces in space-constrained projects without sacrificing performance. Therefore, the TM1640 stands as an ideal solution for applications ranging from industrial instrumentation to consumer appliance displays where clarity and pin-efficiency are paramount.

Key Features:

• High Display Capacity: Supports up to 16 digits of 7-segment displays or a 128-dot matrix (16 segments x 8 grids).
• Two-Wire Serial Interface: Uses only SCLK and DIN lines for communication, simplifying PCB routing and reducing MCU pin overhead.
• Brightness Control: Features an 8-level pulse width modulation (PWM) brightness adjustment circuit, allowing software-based dimming.
• Integrated Power-On Reset: Includes a built-in reset circuit to ensure the device starts in a known state upon power application.
• High-Voltage Drive: Provides sufficient sink and source current capabilities to maintain high display contrast and visibility.

Technical Specifications:

• Supply Voltage (V_DD): 4.5 V to 5.5 V
• Logic High Input Voltage: 0.7 V_DD to V_DD
• Logic Low Input Voltage: 0 V to 0.3 V_DD
• Oscillation Frequency: ≈ 450 kHz
• Maximum Segment Drive Current: ≈ 20 mA (Source)
• Maximum Grid Drive Current: ≈ 200 mA (Sink)
• Operating Temperature: −40°C to +85°C

Mechanical Specifications:

• Package Type: SOP-28 (Small Outline Package)
• Mounting Style: Surface Mount Device (SMD)
• Lead Finish: Tin-plated matte finish for superior solderability.
• Packaging Material: Molded plastic with high thermal stability and flame retardancy.

Dimensions:

• Body Length: ≈ 17.9 mm to 18.1 mm
• Body Width: ≈ 7.4 mm to 7.6 mm (Excluding leads)
• Total Width: ≈ 10.3 mm (Including leads)
• Pitch: 1.27 mm
• Height: ≈ 2.5 mm

Pinout and Wiring:

• VSS (Pin 14): Ground connection for the digital and power sections.
• DIN (Pin 24): Serial Data Input. Data is shifted in on the rising edge of the clock signal.
• SCLK (Pin 25): Serial Clock Input. This line synchronizes data transmission.
• VDD (Pin 28): Positive Power Supply. Connect a 5V source here.
• GR1-GR16 (Grid Pins): Connect these pins to the common cathodes of the 16 display digits.
• SEG1-SEG8 (Segment Pins): Connect these pins to the anodes (A through G and DP) of the LED segments.

Datasheet Reference:

• Download Titan Micro TM1640 IC Datasheet

Commonly Used in:

• Consumer Appliances: Found in microwave ovens, washing machines, and air conditioning units for status display.
• Industrial Panels: Used for digital readouts on PLC modules and frequency converters.
• Embedded Projects: Popular among hobbyists for creating 16-digit clocks and counters with Arduino or ESP8266.

Applications:

• Digital Clocks: Powering multi-digit time and date displays with minimal wiring.
• Measurement Instruments: Driving numerical readouts for voltmeters, ammeters, and thermometers.
• Ticketing Systems: Displaying numbers and queue information in public terminals.
• Matrix Displays: Managing small 16×8 LED dot matrix modules for scrolling text or icons.

Equivalent Models:

• MAX7219: A similar serial-input driver, however, it typically supports only 8 digits per chip compared to the TM1640’s 16 digits.
• TM1637: A smaller cousin from the same family, though it supports fewer segments and digits.
• AIP1640: A functional equivalent often used as a direct drop-in replacement in various circuit designs.

Package Includes:

• 1 x TM1640 16-Digit Seven Segment Display Driver IC SOP-28