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參數(shù)資料
| 型號： | MC14489B |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Multi-Character LED Display/Lamp Driver(多字符LED顯示/ 指示燈驅(qū)動器) |
| 中文描述： | 多字符LED顯示/燈驅(qū)動器（多字符LED顯示/指示燈驅(qū)動器） |
| 文件頁數(shù)： | 7/22頁 |
| 文件大?。?/td> | 2258K |
| 代理商： | MC14489B |
MC14489B
MOTOROLA
7
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 Decodemode 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.
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.
Figure 7. a through h Nominal Current per Output versus Rx
35
30
25
20
15
10
5
400
800
1.2 k
2.0 k
2.4 k 2.8 k
3.2 k
3.6 k
4.0 k
1.6 k
i
5 V SUPPLY
BIT D23 = HIGH (BRIGHTEN LEDs)
WITH D23 = LOW, iOH IS CUT BY
～
50%.
Rx, EXTERNAL RESISTOR (
)
NOTE: Drive current tolerance is approximately
±
15%.
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| MC14489BDW | 功能描述:IC DRIVER LED/LAMP 5CH 20-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 顯示器驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 顯示器類型:真空熒光 (VF) 配置:5 x 7（矩陣） 接口:串行 數(shù)字或字符:- 電流 - 電源:3.5mA 電源電壓:2.7 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-QSOP 包裝:帶卷 (TR) |
| MC14489BDWE | 功能描述:LED顯示驅(qū)動器 5 CHANNEL LED DRIVER RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| MC14489BDWER2 | 功能描述:LED顯示驅(qū)動器 5 CHANNEL LED DRIVER RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| MC14489BDWER2-CUT TAPE | 制造商:Freescale 功能描述:MC14489 Series 5.5 V 5 Channel Multi Character Led Display/Lamp Driver SOIC-20 |
| MC14489BDWR2 | 功能描述:IC DRIVER LED/LAMP 5CH 20-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 顯示器驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 顯示器類型:真空熒光 (VF) 配置:5 x 7（矩陣） 接口:串行 數(shù)字或字符:- 電流 - 電源:3.5mA 電源電壓:2.7 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-QSOP 包裝:帶卷 (TR) |
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