19-2312; Rev 2; 11/02
✕
2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 7
Matrix LED Display Driver
General Description
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
ꢀ 2.7V to 5.5V Operation
displays through an I2C™-compatible serial interface.
The MAX6953 drives up to four digits (140 LEDs).
ꢀ Drives 4 Monocolor or 2 Bicolor Cathode-Row
✕
5
7 Matrix Displays
Included on-chip are an ASCII 104-character font, mul-
tiplex 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 bright-
ness control.
ꢀ 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
The device includes a low-power shutdown mode, seg-
ment 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.
ꢀ 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
For an SPI™-compatible version, refer to the MAX6952
data sheet. An EV kit is available for the MAX6952.
Applications
Ordering Information
Message Boards
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
Medical Equipment
Industrial Displays
Audio/Video Equipment
Gaming Machines
MAX6953EAX
MAX6953EPL
36 SSOP
40 PDIP
Pin Configurations appear at end of data sheet.
Typical Application Circuit
DIGIT 0
DIGIT 1
O14
O15
O16
O17
O18
C1
C2
C3
C4
C5
O19
O20
O21
O22
O23
C1
C2
C3
C4
C5
V+
V+
V+
O0
O1
O2
3.3V
O3
O4
O5
O6
O7
O8
O9
O10
O11
O12
O13
O14
O15
O16
O17
O18
O19
O20
O21
O22
O23
R1
R2
R3
R4
R5
R6
R7
O0
O1
O2
O3
O4
R1
R2
R3
R4
R5
R6
O0
O1
O2
100nF
47µF
GND
GND
GND
O3
O4
3.3V
MAX6953
O5
O6
O5
O6
R7
4.7kΩ
4.7kΩ
4.7kΩ
DIGIT 3
DIGIT 2
SCL
O19
O20
O21
O22
O23
C1
C2
C3
C4
C5
C1
C2
C3
C4
C5
O14
O15
O16
O17
O18
SDA
BLINK
AD1
AD0
R1
R2
R3
R4
R5
R6
R1
R2
R3
R4
R5
R6
R7
O7
O8
O7
O8
OSC
ISET
O9
O9
O10
53.6kΩ
SET
O10
O11
26pF
R
O11
C
SET
O12
O13
O12
O13
R7
I2C is a trademark of Philips Corp.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
1
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.