参数资料
型号: MAX6955ATL+T
厂商: Maxim Integrated
文件页数: 5/43页
文件大小: 0K
描述: IC DRVR DSPL LED 40-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
显示器类型: LED
配置: 7、14、16 段
接口: I²C
电流 - 电源: 22mA
电源电压: 2.7 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 40-WFQFN 裸露焊盘
供应商设备封装: 40-TQFN-EP(6x6)
包装: 带卷 (TR)
MAX6955
2-Wire Interfaced, 2.7V to 5.5V LED Display
Driver with I/O Expander and Key Scan
Typical Operating Characteristics
(V+ = 3.3V, LED forward voltage = 2.4V, Typical Application Circuit, T A = +25°C, unless otherwise noted.)
INTERNAL OSCILLATOR FREQUENCY
INTERNAL OSCILLATOR FREQUENCY
INTERNAL OSCILLATOR WAVEFORM
4.4
4.2
4.0
3.8
vs. TEMPERATURE
R SET = 56k ?
C SET = 22pF
4.4
4.2
4.0
3.8
vs. SUPPLY VOLTAGE
R SET = 56k ?
C SET = 22pF
OSC
0V
OSC_OUT
AT OSC AND OSC_OUT PINS
MAX6954 toc03
R SET = 56k ?
C SET = 22pF
0V
3.6
3.6
-40
-10
20
50
80
110
2.5
3.0
3.5
4.0
4.5
5.0
5.5
100ns/div
110
TEMPERATURE ( ° C)
DEAD CLOCK OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
R SET = 56k ?
1.02
SUPPLY VOLTAGE (V)
SEGMENT SOURCE CURRENT
vs. SUPPLY VOLTAGE
OSC: 500mV/div
OSC_OUT: 2V/div
WAVEFORM AT PINS O0 AND O18,
MAXIMUM INTENSITY
MAX6954 toc06
105
100
95
C SET = GND
1.00
0.98
O0
0V
0.96
90
85
80
0.94
0.92
V LED = 1.8V
O18
0V
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1V/div
45
SUPPLY VOLTAGE (V)
GPIO SINK CURRENT
vs. TEMPERATURE
0.5
SUPPLY VOLTAGE (V)
PORT INPUT PULLUP CURRENT
vs. TEMPERATURE
200 μ s/div
KEY-SCAN OPERATION
(KEY_A AND IRQ)
MAX6954 toc09
40
35
30
25
V CC = 5.5V
OUTPUT = LOW
V PORT = 0.6V
0.4
0.3
V CC = 5.5V
OUTPUT = HIGH
V PORT = 1.4V
KEY_A
20
15
10
V CC = 3.3V
V CC = 2.5V
0.2
0.1
V CC = 3.3V
V CC = 2.5V
0V
IRQ
5
0V
0
-40
-10
20
50
80
110
0
-40
-10
20
50
80
110
400 μ s/div
Maxim Integrated
TEMPERATURE ( ° C)
TEMPERATURE ( ° C)
KEY_A: 1V/div
IRQ: 2V/div
5
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