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参数资料
| 型号： | MAX6954ATL+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/39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： | 50 |
| 显示器类型： | LED |
| 配置： | 7、14、16 段 |
| 接口： | 4 线串行 |
| 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： | 管件 |
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4-Wire Interfaced, 2.7V to 5.5V LED Display
Driver with I/O Expander and Key Scan
Pin Description
SSOP
1, 2,
34, 35, 36
3
4
5
6
PIN
PDIP
1, 2,
38, 39, 40
3
4
5
6
TQFN-EP
36, 37,
33, 34, 35
38
39
40
1
NAME
P0–P4
CS
DOUT
CLK
DIN
FUNCTION
General-Purpose I/O Ports (GPIOs). GPIO can be configured as logic inputs or
open-drain outputs. Enabling key scanning configures some or all ports P0–P3 as
key-switch matrix inputs with internal pullup and port P4 as IRQ output.
Chip-Select Input. Serial data is loaded into the shift register while CS is low. The
most recent 16 bits of data latch on CS ’s rising edge.
Serial-Data Output. The data into DIN is valid at DOUT 15.5 clock cycles later. Use
this pin to daisy-chain several devices or allow data readback. Output is push-pull.
Serial-Clock Input. On CLK’s rising edge, data shifts into the internal shift register. On
CLK’s falling edge, data is clocked out of DOUT. CLK is active only while CS is low.
Serial-Data Input. Data from DIN loads into the internal 16-bit shift register on CLK’s
rising edge.
Digit/Segment Drivers. When acting as digit drivers, outputs O0 to O7 sink current
7–15,
22–31
7–15,
26–35
2–10,
21–30
O0–O18
from the display common cathodes. When acting as segment drivers, O0 to O18
source current to the display anodes. O0 to O18 are high impedance when not
being used as digit or segment drivers.
16, 18
17
19, 21
20
32
33
—
—
17, 18, 20
19
21, 23, 24
22
36
37
16, 25
—
12, 13, 15
14
16, 18, 19
17
31
32
11, 20
—
GND
ISET
V+
OSC
BLINK
OSC_OUT
N.C.
EP
Ground
Segment Current Setting. Connect ISET to GND through series resistor R SET to set
the peak current.
Positive Supply Voltage. Bypass V+ to GND with a 47μF bulk capacitor and a 0.1μF
ceramic capacitor.
Multiplex Clock Input. To use internal oscillator, connect capacitor C SET from OSC
to GND. To use external clock, drive OSC with a 1MHz to 8MHz CMOS clock.
Blink Clock Output. Output is open drain.
Clock Output. OSC_OUT is a buffered clock output to allow easy blink
synchronization of multiple MAX6954s. Output is push-pull.
Not Connected Internally
Exposed Pad (TQFN package only). Internally connected to GND. Connect to a
large ground plane to maximize thermal performance.
Detailed Description
The MAX6954 is a serially interfaced display driver that
can drive up to 16 digits 7-segment, 8 digits 14-seg-
ment, 8 digits 16-segment, 128 discrete LEDs, or a
combination of these display types. Table 1 shows the
drive capability of the MAX6954 for monocolor and
bicolor displays.
The MAX6954 includes 104-character ASCII font maps
for 14-segment and 16-segment displays, as well as
the hexadecimal font map for 7-segment displays. The
characters follow the standard ASCII font, with the addi-
tion of the following common symbols: ￡, € , ￥, °, μ, ±,
↑ , and ↓ . Seven bits represent the 104-character font
map; an 8th bit is used to select whether the decimal
point (DP) is lit. Seven-segment LED digits may be con-
trolled directly or use the hexadecimal font. Direct seg-
ment control allows the MAX6954 to be used to drive
bar graphs and discrete LED indicators.
Tables 2, 3, and 4 list the connection schemes for 16-,
14-, and 7-segment digits, respectively. The letters in
Tables 2, 3, and 4 correspond to the segment labels
shown in Figure 1. (For applications that require mixed
display types, see Tables 37–40.)
Serial Interface
The MAX6954 communicates through an SPI-compati-
ble 4-wire serial interface. The interface has three
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6954ATL+ | 功能描述:LED显示驱动器 2.7-5.5V LED Display Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6954ATL+T | 功能描述:LED显示驱动器 2.7-5.5V LED Display Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6954ATL-T | 功能描述:LED显示驱动器 RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6954EAX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6955AAX | 功能描述:LED显示驱动器 Integrated Circuits (ICs) RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
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