19-2312; Rev 3; 3/04
2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 ✕ 7
Matrix LED Display Driver
Features
♦ 400kbps 2-Wire Interface Compatible with I2C
The MAX6953 is a compact cathode-row display driver
that interfaces microprocessors to 5 ✕ 7 dot-matrix LED
displays through an I2C™-compatible serial interface.
The MAX6953 drives up to four digits (140 LEDs).
Included on-chip are an ASCII 104-character font, multiplex scan circuitry, column and row drivers, and static
RAM that stores each digit, as well as font data for 24
user-definable characters. The segment current for the
LEDs is set by an internal digit-by-digit digital brightness control.
The device includes a low-power shutdown mode, segment blinking (synchronized across multiple drivers, if
desired), and a test mode that forces all LEDs on. The
LED drivers are slew-rate limited to reduce EMI.
For an SPI™-compatible version, refer to the MAX6952
data sheet. An EV kit is available for the MAX6952.
♦ 2.7V to 5.5V Operation
♦ Drives 4 Monocolor or 2 Bicolor Cathode-Row
5 ✕ 7 Matrix Displays
♦ Built-In ASCII 104-Character Font
♦ 24 User-Definable Characters Available
♦ Automatic Blinking Control for Each Segment
♦ 70µA Low-Power Shutdown (Data Retained)
♦ 16-Step Digital Brightness Control
♦ Display Blanked on Power-Up
♦ Slew-Rate-Limited Segment Drivers for Lower EMI
♦ 36-Pin SSOP and 40-Pin DIP Packages
♦ Extended Temperature Range as Standard
Applications
Ordering Information
Message Boards
PART
PIN-PACKAGE
-40°C to +85°C
36 SSOP
MAX6953EPL
Industrial Displays
TEMP RANGE
MAX6953EAX
Medical Equipment
-40°C to +85°C
40 PDIP
Audio/Video Equipment
Pin Configurations appear at end of data sheet.
Gaming Machines
Typical Application Circuit
DIGIT 0
V+
V+
V+
3.3V
100nF
47µF
GND
GND
GND
MAX6953
3.3V
4.7kΩ
4.7kΩ
4.7kΩ
SCL
SDA
BLINK
AD1
AD0
O0
O1
O2
O3
O4
O5
O6
O7
O8
O9
O10
O11
O12
O13
O14
O15
O16
O17
O18
O19
O20
O21
O22
O23
DIGIT 1
O14
O15
O16
O17
O18
C1
C2
C3
C4
C5
O19
O20
O21
O22
O23
C1
C2
C3
C4
C5
O0
R1
O0
R1
O1
R2
O1
R2
O2
R3
O2
R3
O3
R4
O3
R4
O4
R5
O4
R5
O5
R6
O5
R6
O6
R7
O6
R7
DIGIT 3
DIGIT 2
26pF
CSET
53.6kΩ
RSET
O19
O20
O21
O22
O23
C1
C2
C3
C4
C5
O7
R1
O7
R1
O8
R2
O8
R2
O9
R3
O9
R3
O10
R4
O10
R4
O11
R5
O11
R5
R6
O12
R6
O13
ISET
C1
C2
C3
C4
C5
O12
OSC
O14
O15
O16
O17
O18
R7
O13
R7
I2C is a trademark of Philips Corp.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX6953
General Description