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Jtron 8-Digital Display Module / 8-LED SPI Control Digital Module - Red

Jtron 8-Digital Display Module / 8-LED SPI Control Digital Module - Red

by Jtron
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SKU: 382783
  • US$4.29

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  • 3.95
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Related Products

Jtron 8-Digital Display Module / 8-LED SPI Control Digital Module - Red

Jtron 8-Digital Display Module / 8-LED SPI Control Digital Module - Red

US$3.95 US$4.29 8%OFF 0


The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (uPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI, QSPI, and Microwire, and has slew-ratelimited.

segment drivers to reduce EMI.

A convenient 3-wire serial interface connects to all common uPs. Individual digits may be addressed and updated without rewriting the entire display. The MAX7219/MAX7221 also allow the user to select code-B decoding or no-decode for each digit.

The devices include a 150uA low-power shutdown mode, analog and digital brightness control, a scanlimit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on.


10MHz Serial Interface

Individual LED Segment Control

Decode / No-Decode Digit Selection

150uA Low-Power Shutdown (Data Retained)

Digital and Analog Brightness Control

Display Blanked on Power-Up

Drive Common-Cathode LED Display

Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221)

SPI, QSPI, Microwire Serial Interface (MAX7221)

24-Pin DIP and SO Packages


Bar-Graph Displays

7-Segment Displays

Industrial Controllers

Panel Meters

LED Matrix Displays

Pin Configuration

Typical Operating Characteristics

Functional Diagram

Wiring instructions :

VCC → 5V


DIN → P1.0

CS → P1.1

CLK → P1.2


1.VCC and GND Do not reversed, it would burn the chip;

2. Use the old 51 microcontroller port P0 pull-up resistor required.


Quantity1 piece
Form ColorRed
MaterialPCB + plastic
English Manual / SpecNo
Other Features
Dimensions & Weight
Dimensions 3.03 in x 0.87 in x 0.47 in (7.7 cm x 2.2 cm x 1.2 cm)
Weight 0.42 oz (12 g)
Packing List
1 x Module

All packages from DX.com are sent without DX logo or any information indicating DX.com. Due to package variations from suppliers, the product packaging customers receive may be different from the images displayed.

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Quantity 3+ units 5+ units 10+ units
Rate US$3.50 shipped US$3.49 shipped US$3.48 shipped

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