Product Summary

The MAX7221CWG is a compact, serial input/output common-cathode display driver that interfaces microprocessor (μP) 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 MAX7221CWG is compatible with SPI, QSPI, and Microwire, and has slew-ratelimited segment drivers to reduce EMI.

Parametrics

MAX7221CWG absolute maximum ratings: (1)Voltage (with respect to GND): V+: -0.3V to 6V; DIN, CLK, LOAD, CS: -0.3V to 6V; All Other Pins: -0.3V to (V+ + 0.3V); (2)Current: DIG0–DIG7 Sink Current: 500mA; SEGA–G, DP Source Current: 100mA; (3)Continuous Power Dissipation (TA = +85℃): Narrow Plastic DIP (derate 13.3mW/℃; (4)above +70℃): 1066mW; Wide SO (derate 11.8mW/℃ above +70℃): 941mW; Narrow CERDIP (derate 12.5mW/℃ above +70℃): 1000mW; (5)Operating Temperature Ranges (TMIN to TMAX): 0℃ to +70℃; (6)Storage Temperature Range: -65℃ to +160℃; (7)Lead Temperature (soldering, 10s): +300℃.

Features

MAX7221CWG features: (1)10MHz Serial Interface; (2)Individual LED Segment Control; (3)Decode/No-Decode Digit Selection; (4)150μA Low-Power Shutdown (Data Retained); (5)Digital and Analog Brightness Control; (6)Display Blanked on Power-Up; (7)Drive Common-Cathode LED Display; (8)Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221); (9)SPI, QSPI, Microwire Serial Interface (MAX7221); (10)24-Pin DIP and SO Packages.

Diagrams

MAX7221CWG block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MAX7221CWG
MAX7221CWG

Maxim Integrated Products

LED Display Drivers Integrated Circuits (ICs)

Data Sheet

Negotiable 
MAX7221CWG+
MAX7221CWG+

Maxim Integrated Products

LED Display Drivers 8-Digit LED Display Driver

Data Sheet

0-1: $7.57
1-25: $5.04
25-50: $3.19
50-100: $3.14
MAX7221CWG+T
MAX7221CWG+T

Maxim Integrated Products

LED Display Drivers 8-Digit LED Display Driver

Data Sheet

0-765: $2.94
765-1000: $2.76
MAX7221CWG-T
MAX7221CWG-T

Maxim Integrated Products

LED Display Drivers

Data Sheet

Negotiable