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MAX7219CWG
+StücklisteIC DRVR 7 SEGMNT 8 DIGIT 24SOIC
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HerstellerAnalog Devices Inc./Maxim Integrated
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Herstellerteil #MAX7219CWG
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Paket SOIC-24
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Auf Lager3516
365 Tage Qualitätsgarantie
7*24 Stunden-Servicegarantie
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Spezifikationen
| Attribut | Wert |
| Package | Tube,Tube |
| ProductStatus | Obsolete |
| DisplayType | LED |
| Configuration | 7 Segment + DP |
| Interface | 4-Wire Serial |
| DigitsorCharacters | 8 Digits |
| Current-Supply | 330 mA |
| Voltage-Supply | 4V ~ 5.5V |
| OperatingTemperature | 0°C ~ 70°C |
| MountingType | Surface Mount |
| Package/Case | 24-SOIC (0.295, 7.50mm Width) |
Übersicht
Description
Interface: SPI-like three-wire bus (DIN, CLK, CS/LOAD) plus optional DOUT for daisy chaining. Data frames are 16 bits: 8-bit register address and 8-bit data; writes are latched on CS.
Key features:
- Decode mode for easy 7-seg displays or no-decode for custom matrices
- 8-digit/8x8 display capability with 1/8 duty cycle
- Brightness control via an INTENSITY register (0–15)
- Global display enable/disable (SHUTDOWN) and a DISPLAY_TEST mode
- Current regulation: constant-current outputs with external ISET resistor to set LED current
Typical use: scoreboards, clocks, meters, sign displays, and LED matrices with minimal microcontroller I/O.
CWG denotes a specific package variant; check the datasheet for exact pinout, voltage range, and thermal conditions.
Equivalent
- MAX7221 (Maxim) – 8-digit LED driver, SPI-like interface (same family)
- STP16CPC26 (STMicroelectronics) – 16-channel constant-current LED driver with serial input
- HT16K33 (Holtek) – I2C LED driver for 8x8 matrices and 7-seg displays
- IS31FL3731/IS31FL3733 (Injoinic/ITE) – I2C LED-matrix drivers with many channels
These serve as cross-compatibles for similar LED display driving tasks.
Features
- 8-digit LED driver for 7-segment digits or an 8×8 LED matrix (multiplexed).
- Constant-current sinks; LED current set by a single ISET resistor (typical range up to ~40 mA per segment).
- 16-level brightness control via an intensity (brightness) register (global PWM).
- SPI-like serial interface: DIN, CLK, CS with DOUT for daisy-chaining.
- 8 data registers for digits; supports Code B decode (0–9, dash, blank) or No Decode for raw segments.
- Scan limit programmable (0–7) to choose how many digits are driven.
- Display test mode and normal operation; shutdown (standby) mode.
- Minimal external components (no per-LED resistors needed; just ISET for current control).
- Wide supply: typically 4.5–5.5 V.
- CWG package variant (compact, surface-mount).
These make it easy to drive large LED displays with a single, programmable driver.
Pinout
Function: MAX7219CWG is a serially interfaced, constant-current LED display driver. It can drive up to 8 digits (7-segment with dot) or an 8×8 LED matrix via multiplexing. It uses a 3-wire interface (DIN/data in, CLK, LOAD/latch) with an optional DOUT for daisy chaining. It provides 16 LED outputs (SEG0–SEG7 and DIG0–DIG7) and an ISET pin to program the segment current with an external resistor. Power pins: V+, GND.
Manufacturer
Application
- Serial-in, multiplexed LED display with programmable current and dimming
- Digital clocks, timers, counters, and measurement instruments
- Scoreboards and sports timing displays
- Numeric displays in meters, price/indicator boards, and dashboards
- Information signs and small LED marquees
- Display panels and control panels in appliances and industrial equipment
- Suitable for microcontroller projects (embedded/DIY) needing compact LED display driving
Package
Frequently Asked Questions
Q: What is the maximum number of 7-segment LED digits the MAX7219CWG can drive?
A: It can drive up to 8 digits of 7-segment LED displays with decimal points.
Q: What is the required supply voltage range for this part?
A: The operating supply voltage is 4V to 5.5V, making it suitable for standard 5V logic systems.
Q: What type of interface does the MAX7219CWG use for communication?
A: It uses a 4-wire serial interface, which is compatible with SPI bus protocols for easy connection to microcontrollers.
Q: What is the typical current consumption when all LEDs are illuminated?
A: The maximum current supply is 330 mA, depending on the LED load and intensity settings.
Q: What is the operating temperature range of this driver IC?
A: It is specified for commercial temperature operation from 0°C to 70°C.
Q: Can this IC drive common-cathode LED displays?
A: Yes, the MAX7219 is designed for common-cathode LED display configurations.
Q: Is the MAX7219CWG in a surface-mount package?
A: Yes, it comes in a 24-pin SOIC package with a 7.50mm body width for surface-mount assembly.
