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参数资料
| 型号： | MC14489BPE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 7/22页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 5-CH CMOS 20-DIP |
| 标准包装： | 18 |
| 显示器类型： | LED |
| 配置： | 7 段显示 |
| 接口： | 串行 |
| 电流 - 电源： | 5.5mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 130°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 20-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 20-PDIP |
| 包装： | 管件 |
| 产品目录页面： | 809 (CN2011-ZH PDF) |
a through h (Pins 1, 2, 4 – 7, 19, 20)
Anode–Driver Current Sources. These outputs are close-
ly–matched current sources which directly tie to the anodes
of external discrete LEDs (lamps) or display segment LEDs.
Each output is capable of sourcing up to 35 mA.
When used with lamps, outputs a, b, c, and d are used to
independently control up to 20 lamps. Output h is used to con-
trol up to 5 lamps dependently. (See Figure 17.) For lamps,
the No Decode mode is selected via the configuration regis-
ter, forcing e, f, and g inactive (low).
When used with segmented displays, outputs a through g
drive segments a through g, respectively. Output h is used to
drive the decimals. Refer to Figure 9. If unused, h must be left
open.
Bank 1 through Bank 5 (Pins 9, 13, 15, 16, 17)
Diode–Bank FET Switches. These outputs are low–resis-
tance switches to ground (VSS) capable of handling currents
of up to 320 mA each. These pins directly tie to the common
cathodes of segmented displays or the cathodes of lamps
(wired with cathodes common).
The display is refreshed at a nominal 1 kHz rate to achieve
optimum brightness from the LEDs. A 20% duty cycle is uti-
lized.
35
Special design techniques are used on–chip to accommo-
date the high currents with low EMI (electromagnetic interfer-
ence) and minimal spiking on the power lines.
POWER SUPPLY
VSS (Pin 14)
Most–negative supply potential. This pin is usually ground.
Resistor Rx is externally tied to ground (VSS). Therefore,
the chip’s VSS pin does not contain the Rx current compo-
nent.
VDD (Pin 13)
Most–positive supply potential.
To guarantee data integrity in the registers and to ensure
the serial interface is functional, this voltage may range from
3 to 6 volts with respect to VSS. For example, within this volt-
age range, the chip could be placed in and out of the low–
power mode.
To adequately drive the LEDs, this voltage must be 4.5 to
6 volts with respect to VSS.
The VDD pin contains the Rx current component plus the
chip’s current drain. In the low–power mode, the current mir-
ror and clock oscillator are turned off, thus significantly reduc-
ing the VDD current, IDD.
5 V SUPPLY
30
25
20
15
10
5
BIT D23 = HIGH (BRIGHTEN LEDs)
WITH D23 = LOW, iOH IS CUT BY ～ 50%.
400
800
1.2 k
1.6 k
2.0 k
2.4 k 2.8 k
3.2 k
3.6 k
4.0 k
Rx, EXTERNAL RESISTOR ( ? )
NOTE: Drive current tolerance is approximately ± 15%.
Figure 7. a through h Nominal Current per Output versus Rx
MOTOROLA
MC14489B
7
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相关代理商/技术参数 |
参数描述 |
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| MC14489P | 制造商:Motorola Inc 功能描述: |
| MC14490DW | 功能描述:算数逻辑单元 - ALU LOG CMOS 3-18V HEX BOUNCE ELIMINATOR RoHS:否 制造商:ON Semiconductor 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:18 V 电源电压-最小:3 V 封装 / 箱体:SOIC-16 Wide 最大工作温度:+ 125 C 封装:Reel |
| MC14490DWG | 功能描述:算数逻辑单元 - ALU LOG CMOS 3-18V HEX BOUNCE ELIMINATOR RoHS:否 制造商:ON Semiconductor 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:18 V 电源电压-最小:3 V 封装 / 箱体:SOIC-16 Wide 最大工作温度:+ 125 C 封装:Reel |
| MC14490DWG | 制造商:ON Semiconductor 功能描述:Gate / Inverter Logic IC Package/Case:16 |
| MC14490DWR2 | 功能描述:算数逻辑单元 - ALU LOG CMOS 3-18V HEX BOUNCE ELIMINATOR RoHS:否 制造商:ON Semiconductor 高电平输出电流: 低电平输出电流: 传播延迟时间: 电源电压-最大:18 V 电源电压-最小:3 V 封装 / 箱体:SOIC-16 Wide 最大工作温度:+ 125 C 封装:Reel |
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