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MAX7219C/D 产品手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
LED驱动器
封装:
DICE
描述:
串行接口， 8位LED显示驱动器 Serially Interfaced, 8-Digit LED Display Drivers
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MAX7219C/D数据手册
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_______________General Description
The MAX7219/MAX7221 are compact, serial input/out-
put common-cathode display drivers that interface
microprocessors (µPs) to 7-segment numeric LED dis-
plays of up to 8 digits, bar-graph displays, or 64 indi-
vidual LEDs. Included on-chip are a BCD code-B
decoder, multiplex scan circuitry, segment and digit
drivers, and an 8x8 static RAM that stores each digit.
Only one external resistor is required to set the seg-
ment current for all LEDs. The MAX7221 is compatible
with SPI™, QSPI™, and Microwire™, and has slew-rate-
limited segment drivers to reduce EMI.
A convenient 3-wire serial interface connects to all
common µPs. Individual digits may be addressed and
updated without rewriting the entire display. The
MAX7219/MAX7221 also allow the user to select code-
B decoding or no-decode for each digit.
The devices include a 150µA low-power shutdown
mode, analog and digital brightness control, a scan-
limit register that allows the user to display from 1 to 8
digits, and a test mode that forces all LEDs on.
________________________Applications
Bar-Graph Displays
7-Segment Displays
Industrial Controllers
Panel Meters
LED Matrix Displays
____________________________Features
♦ 10MHz Serial Interface
♦ Individual LED Segment Control
♦ Decode/No-Decode Digit Selection
♦ 150µA Low-Power Shutdown (Data Retained)
♦ Digital and Analog Brightness Control
♦ Display Blanked on Power-Up
♦ Drive Common-Cathode LED Display
♦ Slew-Rate Limited Segment Drivers
for Lower EMI (MAX7221)
♦ SPI, QSPI, Microwire Serial Interface (MAX7221)
♦ 24-Pin DIP and SO Packages
MAX7219/MAX7221
Serially Interfaced, 8-Digit LED Display Drivers
________________________________________________________________
Maxim Integrated Products
1
( ) MAX7221 ONLY
8-DIGIT µP DISPLAY
DIG 0–DIG 7
MOSI
I/O
SCK
18
1
12
13
9
4
DIN
µP
I
SET
9.53k
8 DIGITS
8 SEGMENTS
+5V
19
SEG A–G,
SEG DP
CLK
LOAD (CS)
GND
V+
GND
MAX7219
MAX7221
________Typical Application Circuit__________________Pin Configuration
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
DOUT
SEG D
SEG DP
SEG EGND
DIG 4
DIG 0
DIN
TOP VIEW
SEG C
V+
ISET
SEG GDIG 7
DIG 3
DIG 2
DIG 6
16
15
14
13
9
10
11
12
SEG B
SEG F
SEG A
CLK
( ) MAX7221 ONLY
LOAD (CS)
DIG 1
DIG 5
GND
DIP/SO
MAX7219
MAX7221
19-4452; Rev 3; 7/97
PART
MAX7219CNG
MAX7219CWG
MAX7219C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
24 Narrow Plastic DIP
24 Wide SO
Dice*
______________Ordering Information
Ordering Information continued at end of data sheet.
*Dice are specified at T
A
= +25°C.
MAX7219ENG
MAX7219EWG
MAX7219ERG -40°C to +85°C
-40°C to +85°C
-40°C to +85°C 24 Narrow Plastic DIP
24 Wide SO
24 Narrow CERDIP
SPI and QSPI are trademarks of Motorola Inc. Microwire is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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