MAX6958:2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan

The MAX6958/MAX6959 compact multiplexed common- cathode display drivers interface microprocessors to seven-segment numeric LED digits, or discrete LEDs through an SMBus™- and I²C-compatible 2-wire serial interface. The 2-wire serial interface uses fixed 0.8V/2.1V logic thresholds for compatibility with 2.5V and 3.3V systems when the display driver is powered from a 5V supply. The MAX6958/MAX6959 drive up to four 7-segment digits, with decimal points, plus four discrete LEDs, or four 7-segment digits and eight discrete LEDs if the digits' decimal points are not used, or up to 36 discrete LEDs. The MAX6959 also includes two input ports, one or both of which may be configured as a key-switch reader, which automatically scans and debounces a matrix of up to eight switches. Key-switch status is obtained by polling internal status registers or by configuring the MAX6959 interrupt output. Other on-chip features include a hexadecimal font for seven-segment displays, multiplex scan circuitry, anode and cathode drivers, and static RAM that stores each digit. The peak segment current for the display digits is set internally to 23mA. Display intensity is adjusted using a 64-step internal digital brightness control. The MAX6958/MAX6959 include a low-power shutdown mode, a scan-limit register that allows the user to display from one to four digits, and a test mode, which forces all LEDs on. The LED drivers are slew-rate-limited to reduce EMI. The MAX6958/MAX6959 are available in 16-pin PDIP and QSOP packages and are fully specified over the -40°C to +125°C automotive temperature range.

Key Features
  • 400kbps 2-Wire Serial Interface
  • 3V to 5.5V Operation
  • Drive 4 Digits plus 4 or 8 Discrete LEDs
  • Drive Common-Cathode LED Digits
  • 23mA Constant-Current LED Segment Drive
  • Hexadecimal Decode/No-Decode Digit Selection
  • 64-Step Digital Brightness Control
  • Slew-Rate-Limited Segment Drivers Reduced EMI
  • Debounces Up to Eight Switches with n-Key Rollover (MAX6959 Only)
  • IRQ Output When a Key Input Is Debounced (MAX6959 Only)
  • 20µA Low-Power Shutdown (Data Retained)
  • Automotive Temperature Range (-40°C to +125°C)
  • Compact 16-Pin PDIP and QSOP Packages
MAX6958, MAX6959: Typical Operating Circuit
MAX6958, MAX6959: Typical Operating Circuit
  • Audio/Video Equipment
  • Industrial Controls
  • Panel Meters
  • Set-Top Boxes
  • Vending Machine
  • White Goods
titleDownload file
MAX6958-MAX6959 Data SheetMAX6958-MAX6959.pdf
Part NumberLCD or LEDDigits or Char.Output FormatDisplay TypeInterfaceFontsVSUPPLY
minmaxSee Notes
MAX6958LED4½-Digit7 segment + 2 annunciatorsCommon CathodeSerial 2-Wire 400kbitHexadecimal35.5PDIP(N)/16
$4.38 @1k
$6.36 @1k
Related Products
  • MAX6955:2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
  • MAX6956:2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
  • MAX6954:4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
  • MAX6952:4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
  • MAX6957:4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
  • MAX6953:2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
  • MAX6950:Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
  • MAX6951:Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
  • MAX7221:Serially Interfaced, 8-Digit, LED Display Drivers
  • MAX7219:Serially Interfaced, 8-Digit, LED Display Drivers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6958AAEENo Longer AvailableMAX6958AAEE+QSOP,;16 pin;30.9 mm²-40°C to +125°CNo
MAX6958AAEE+ActiveQSOP,;16 pin;30.9 mm²-40°C to +125°CLead Free
MAX6958AAEE+TActiveQSOP,;16 pin;30.9 mm²-40°C to +125°CLead Free
MAX6958AAEE-TNo Longer AvailableMAX6958AAEE+TQSOP;16 pin-40°C to +125°CSee data sheet
MAX6958AAPENo Longer AvailableMAX6958AAPE+PDIP(N),;16 pin;158.4 mm²-40°C to +125°CNo
MAX6958AAPE+ActivePDIP(N),;16 pin;158.4 mm²-40°C to +125°CLead Free
MAX6958BAEENo Longer AvailableMAX6958BAEE+QSOP,;16 pin;30.9 mm²-40°C to +125°CNo
MAX6958BAEE+ActiveQSOP,;16 pin;30.9 mm²-40°C to +125°CLead Free
MAX6958BAEE+TActiveQSOP,;16 pin;30.9 mm²-40°C to +125°CLead Free
MAX6958BAEE-TNo Longer AvailableMAX6958BAEE+TQSOP;16 pin-40°C to +125°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6958BAPENo Longer AvailableMAX6958BAPE+PDIP(N),;16 pin;158.4 mm²-40°C to +125°CNo
MAX6958BAPE+ActivePDIP(N),;16 pin;158.4 mm²-40°C to +125°CLead Free
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