MAX6950 Maxim, MAX6950 Datasheet
MAX6950
Manufacturer Part Number
MAX6950
Description
Serially Interfaced / +2.7V to +5.5V / 5- and 8-Digit LED Display Drivers
Manufacturer
Maxim
Datasheet
1.MAX6950.pdf
(19 pages)
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The MAX6950/MAX6951 are compact common-cath-
ode display drivers that interface microprocessors to
individual 7-segment numeric LED digits, bar graph, or
discrete LEDs through an SPI™-, QSPI™-MICROWIRE™-
compatible serial interface. The supply voltage can be
as low as 2.7V.
The MAX6950 drives up to five 7-segment digits or 40
discrete LEDs. The MAX6951 drives up to eight 7-seg-
ment digits or 64 discrete LEDs.
Included on-chip are hexadecimal character decoders
(0–9, A–F), multiplex scan circuitry, segment and digit
drivers, and a static RAM that stores each digit. The
user may select hexadecimal decoding or no-decode
for each digit to allow any mix of 7-segment digits, bar
graph, or discrete LEDs to be driven. The segment cur-
rent for the LEDs is set by an internal digital brightness
control. The segment drivers are slew-rate limited to
reduce EMI.
Individual digits may be addressed and updated with-
out rewriting the entire display. The devices include a
low-power shutdown mode, digital brightness control, a
scan-limit register that allows the user to display from
one to eight digits, segment blinking that can be syn-
chronized across drivers, and a test mode that forces
all LEDs on.
19-2227; Rev 1; 12/01
Functional Diagram appears at end of data sheet.
Typical Application appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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.
Set-Top Boxes
Panel Meters
White Goods
Bar Graphs and Matrix Displays
Industrial Controllers and Instrumentation
Professional Audio Equipment
Medical Equipment
________________________________________________________________ Maxim Integrated Products
General Description
Serially Interfaced, +2.7V to +5.5V,
5- and 8-Digit LED Display Drivers
Applications
MAX6950CEE
MAX6950EEE
MAX6951CEE
MAX6951EEE
High-speed 26MHz SPI-, QSPI-, MICROWIRE-
Compatible Serial Interface
+2.7V to +5.5V Operation
Individual LED Segment Control
Segment Blinking Control that Can Be
Synchronized Across Multiple Drivers
Hexadecimal Decode/No-Decode Digit Selection
Digital Brightness Control
Display Blanked on Power-Up
Drives Common-Cathode LED Digits
Multiplex Clock Syncronizable to External Clock
Slew-Rate Limited Segment Drivers for Low EMI
75µA Low-Power Shutdown (Data Retained)
Small 16-Pin QSOP Package
TOP VIEW
( ) MAX6951 ONLY
PART
DIG3/SEG3
DIG2/SEG2
DIG1/SEG1
DIG0/SEG0
GND
ISET
CLK
DIN
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
1
2
6
3
4
5
7
8
0°C to +70°C
0°C to +70°C
Ordering Information
MAX6950
MAX6951
QSOP
Pin Configuration
16
15
14
13
12
11
10
9
V+
CS
DIG4/SEG4
(DIG5)/SEG5
(DIG6)/SEG6
(DIG7)/SEG7
SEG8
OSC
16 QSOP
16 QSOP
16 QSOP
16 QSOP
PIN-PACKAGE
Features
1
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