19-2437; Rev 1; 10/02
4-Wire Interfaced, 2.7V to 5.5V,
✕
4-Digit 5 7 Matrix LED Display Driver
General Description
Features
The MAX6952 is a compact cathode-row display driver
ꢀ High-Speed 26MHz with SPI-/QSPI-™/
✕
that interfaces microprocessors to 5 7 dot-matrix LED
MICROWIRE™-Compatible Serial Interface
displays through an SPI™-compatible serial interface.
The MAX6952 drives up to four digits (140 LEDs).
ꢀ 2.7V to 5.5V Operation
ꢀ Drives Four Monocolor or Two Bicolor Cathode-
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.
✕
Row 5 7 Matrix Displays
ꢀ Built-In ASCII 104-Character Font
ꢀ 24 User-Definable Characters Available
ꢀ Automatic Blinking Control for Each Segment
ꢀ 36µA 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
For a 2-wire interfaced version, refer to the MAX6953
data sheet. An EV kit is available for the MAX6952.
Applications
Message Boards
Medical Equipment
Industrial Displays
Audio/Video
Equipment
Ordering Information
PART
MAX6952EAX
MAX6952EPL
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
36 SSOP
Gaming Machines
40 PDIP
Pin Configurations appear at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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
O0
O1
O2
3.3V
V+
V+
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
MAX6952
3.3V
O5
O6
O5
O6
R7
4.7kΩ
DIGIT 3
DIGIT 2
CLK
DIN
CS
DOUT
BLINK
O19
O20
O21
O22
O23
C1
C2
C3
C4
C5
C1
C2
C3
C4
C5
O14
O15
O16
O17
O18
R1
R2
R3
R4
R5
R6
R1
R2
R3
R4
R5
R6
R7
O7
O8
O7
O8
OSC
ISET
O9
O9
O10
O10
O11
C
SET
26pF
R
SET
53.6kΩ
O11
O12
O13
O12
O13
R7
________________________________________________________________ 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.