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Description
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The MAX6955 is a compact display driver that interfaces microprocessors to a mix of 7-segment, 14-segment, and 16-segment LED displays through an I²C-compatible 2-wire serial interface. The MAX6955 drives up to 16 digits 7-segment, 8 digits 14-segment, 8 digits 16-segment, or 128 discrete LEDs, while functioning from a supply voltage as low as 2.7V. The driver includes five I/O expander or general-purpose I/O (GPIO) lines, some or all of which can be configured as a key-switch reader. The key-switch reader automatically scans and debounces a matrix of up to 32 switches.
Included on chip are full 14- and 16-segment ASCII 104-character fonts, a hexadecimal font for 7-segment displays, multiplex scan circuitry, anode and cathode drivers, and static RAM that stores each digit. The maximum segment current for the display digits is set using a single external resistor. Digit intensity can be independently adjusted using the 16-step internal digital brightness control. The MAX6955 includes a low-power shutdown mode, a scan-limit register that allows the user to display from 1 to 16 digits, segment blinking (synchronized across multiple drivers, if desired), and a test mode, which forces all LEDs on. The LED drivers are slew-rate limited to reduce EMI.
For an SPI™-compatible version, refer to the MAX6954 data sheet. An evaluation kit (EV kit) for the MAX6955 is available.
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| Ordering Information |
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Devices:
1-9
of
9
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| MAX6955 |
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Sample |
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Package:
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TYPE PINS FOOTPRINT
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DRAWING CODE/VAR *
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RoHS/Lead-Free?
Materials Analysis |
MAX6955APL+
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PDIP(W);40 pin;836 mm²
Outline Drawing: 21-0044 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P40+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX6955AAX
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SSOP;36 pin;163 mm²
Outline Drawing: 21-0040 (PDF)
Land Pattern: 90-0098 (PDF)
Use pkgcode/variation: A36-2*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis
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MAX6955AAX-T
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SSOP;36 pin;163 mm²
Outline Drawing: 21-0040 (PDF)
Land Pattern: 90-0098 (PDF)
Use pkgcode/variation: A36-2*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis
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MAX6955AAX+
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SSOP;36 pin;163 mm²
Outline Drawing: 21-0040 (PDF)
Land Pattern: 90-0098 (PDF)
Use pkgcode/variation: A36+2*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX6955AAX+T
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SSOP;36 pin;163 mm²
Outline Drawing: 21-0040 (PDF)
Land Pattern: 90-0098 (PDF)
Use pkgcode/variation: A36+2*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX6955ATL-T
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TQFN;40 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0055 (PDF)
Use pkgcode/variation: T4066+5*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX6955ATL+T
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TQFN;40 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0055 (PDF)
Use pkgcode/variation: T4066+5*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX6955ATL
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TQFN;40 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0055 (PDF)
Use pkgcode/variation: T4066+5*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX6955ATL+
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TQFN;40 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0055 (PDF)
Use pkgcode/variation: T4066+5*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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Related Products
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MAX6953 2-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
MAX6952 4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver
MAX6954 4-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
MAX7219, MAX7221 Serially Interfaced, 8-Digit, LED Display Drivers
ICM7218, ICM7228 8-Digit, Multiplexed, LED Decoder Driver
MAX6950, MAX6951 Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
MAX6958, MAX6959 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan
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