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參數(shù)資料
| 型號： | MM74C912 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Simplified Multi-Digit LED Display Controller(多數(shù)字式LED顯示控制器) |
| 中文描述： | 簡化的多位LED顯示控制器（多數(shù)字式的LED顯示控制器） |
| 文件頁數(shù)： | 5/26頁 |
| 文件大小： | 639K |
| 代理商： | MM74C912 |
peak segment current; and V
is the MM74C911 or
MM74C912 segment driver output voltage at the peak seg-
ment current, which can be determined from the curves in
Figure 8
In most cases, R
can be more quickly determined from
Figure 9 which plots R
vs. average segment current.
These curves are plotted for various digit driver output volt-
ages using current values from Figure 8 Thus, for the above
example, if a DS75492 driver I.C. is used with the
MM74C911 to interface to the NSB781 LEDs R
= 38
assuming the drivers output voltage is 1.0V. Note that Figure
7tabulates minimum output drive where the above V
is an
approximation of the DS75492s typical V
DO
at 260 mA.
Part
Number
DS75492
DS75494
DS8646
DS8658
DS8870
DS8871/2
DS8877
DS8920
DS8963
DS8978
DS8692
Driver Type
Number of
Drivers
6
6
6
4
6
8/9
6
9
8
9
8
Minimum
Output Drive
250 mA
@
1.5V
150 mA
@
0.35V
84 mA
@
0.55V
84 mA
@
0.55V
350 mA
@
1.4V
40 mA
@
0.5V
35 mA
@
0.5V
40 mA
@
0.5V
500 mA
@
1.5V
100 mA
@
0.7V
350 mA
@
1.0V
Darlington Driver
Multiple Transistor Driver
Transistor Driver
Transistor Driver
Darlington Driver
Transistor Driver
Transistor Driver
Transistor Driver
Darlington Driver
Transistor Driver
Transistor Driver
FIGURE 7. Typical LED Digit Drivers and Their Characteristics
AN006030-7
AN006030-8
FIGURE 8. Typical Segment Driver Current vs. Output Voltage for (a) MM74C911 (b) MM74C912/MM74C917
(a)
AN006030-9
(b)
AN006030-10
FIGURE 9. Average LED Segment Current vs. Segment Resistor for (a) MM74C911 (b) MM74C912/MM74C917
5
www.fairchildsemi.com
相關PDF資料 |
PDF描述 |
|---|---|
| MM74C917 | Simplified Multi-Digit LED Display Controller(多數(shù)字式LED顯示控制器) |
| MM74C912N | 6-Digit BCD Display Controller/Driver |
| MM74C914 | Hex Schmitt Trigger with Extended Input Voltage |
| MM74C914M | Hex Schmitt Trigger with Extended Input Voltage |
| MM74C914N | Hex Schmitt Trigger with Extended Input Voltage |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MM74C912N | 功能描述:LED顯示驅動器 6-Dgt BCD Dis Con/Dr RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格: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 |
| MM74C914 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Hex Schmitt Trigger with Extended Input Voltage |
| MM74C914J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Hex Schmitt Trigger with Extended Input Voltage |
| MM74C914M | 功能描述:變換器 Hex Schmitt Trigger RoHS:否 制造商:NXP Semiconductors 電路數(shù)量:6 邏輯系列:74ABT 邏輯類型:BiCMOS 高電平輸出電流:- 15 mA 低電平輸出電流:20 mA 傳播延遲時間:2.2 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 工作溫度范圍: 封裝 / 箱體:DIP-14 封裝:Tube |
| MM74C914M_Q | 功能描述:變換器 Hex Schmitt Trigger RoHS:否 制造商:NXP Semiconductors 電路數(shù)量:6 邏輯系列:74ABT 邏輯類型:BiCMOS 高電平輸出電流:- 15 mA 低電平輸出電流:20 mA 傳播延遲時間:2.2 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 工作溫度范圍: 封裝 / 箱體:DIP-14 封裝:Tube |
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