MAX6954AAX+ by Analog Devices

4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan

Status: Active
Series: MAX6954
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX6954 is a compact display driver that interfaces microprocessors to a mix of 7-segment, 14-segment, and 16-segment LED displays through an SPI- or QSPI-compatible 4-wire serial interface. The serial interface may be cascaded through multiple devices. The MAX6954 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 GPIO) lines, some or all of which may be configured as a key-switch reader, which 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 MAX6954 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 a 2-wire interfaced version, refer to the MAX6955 data sheet. An evaluation kit (EV kit) for the MAX6955 is available.

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Prices starting from US$17.69

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Features

High-Speed 26MHz SPI/QSPI/MICROWIRE®-Compatible Serial Interface
2.7V to 5.5V Operation
Drives Up to 16 Digits 7-Segment, 8 Digits 14-Segment, 8 Digits 16-Segment, 128 Discrete LEDs, or a Combination of Digit Types
Drives Common-Cathode Monocolor and Bicolor LED Displays
Built-In ASCII 104-Character Font for 14-Segment and 16-Segment Digits and Hexadecimal Font for 7-Segment Digits
Automatic Blinking Control for each Segment
10µA (typ) Low-Power Shutdown (Data Retained)
16-Step Digit-by-Digit Digital Brightness Control
Display Blanked on Power-Up
Slew-Rate Limited Segment Drivers for Lower EMI
Five GPIO Port Pins Can Be Configured as Key-Switch Reader to Scan and Debounce Up to 32 Switches with n-Key Rollover
IRQ Output when a Key Input Is Debounced
36-Pin SSOP and 40-Pin DIP and TQFN Packages
Automotive Temperature Range Standard

Specifications

LCD or LED LED
Display Type Common Cathode
Interface Serial SPI 26Mbit
Fonts 104 char ASCIIHexadecimal
Segment Blinking Yes
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Package/Pins PDIP/40SSOP/36TQFN/40
BudgetaryPrice (See Notes) 15.03

MAX6954AAX+ Semiconductors - ICs by Analog Devices

DRIVER LED 16X7SEG/8X16SEG/128 36SSOP

LED Lighting Components
> LED Driver ICs
> DC / DC LED Driver ICs
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX6954 is a compact display driver that inter- faces microprocessors to a mix of 7-segment, 14-seg- ment, and 16-segment LED displays through an SPI-/ QSPI™-compatible 4-wire serial interface. The serial interface may be cascaded through multiple devices. The MAX6954 drives up to 16 digits 7-segment, 8 dig- its 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 GPIO) lines, some or all of which may be configured as a key-switch reader, which 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 driv- ers, 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 con- trol. The MAX6954 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 mul- tiple drivers, if desired), and a test mode, which forces all LEDs on. The LED drivers are slew-rate limited to reduce EMI. For a 2-wire interfaced version, refer to the MAX6955 data sheet. An evaluation kit (EV kit) for the MAX6955 is available.

Specifications

Device Topology -
Input Voltage Min 2.7V
Input Voltage Max 5.5V
Output Voltage Max -
Output Current Max 935mA
Switching Frequency 8MHz
No. of Outputs 19Outputs
IC Mounting SMD
Driver Case Style SSOP
No. of Pins 36Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 6954
Dimming Control Type PWM
Input Voltage 2.7V to 5.5V
LED Driver Application Automotive Display
Operating Temperature Range -40°C to +125°C
Output Current 935mA

Alternative Descriptions

Led Display Driver, 8Mhz, Ssop-36 | Newark Electronics
DRIVER, LED, 16X7SEG/8X16SEG/128, 36SSOP | element14
4-Wire Interfaced, 2.7V to 5.5 | Analog Devices

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This part has not been flagged as RoHS Compliant.

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