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MC14489DW bảng dữ liệu(PDF) 10 Page - Motorola, Inc

tên linh kiện MC14489DW
Giải thích chi tiết về linh kiện  Multi-Character LED Display/Lamp Driver
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nhà sản xuất  MOTOROLA [Motorola, Inc]
Trang chủ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC14489DW bảng dữ liệu(HTML) 10 Page - Motorola, Inc

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MC14489
MOTOROLA
10
(a) Configuration Registers
C7
C6
C5
C4
C3
C2
C1
C0
1ST BYTE
SHIFTED IN
2ND BYTE
3RD BYTE
4TH BYTE
CONFIGURATION
REGISTER OF
DEVICE 2 IN
FIGURE 11
CONFIGURATION
REGISTER OF
DEVICE 1 IN
FIGURE 11
DON’T CARE
DON’T CARE
(b) Display Registers
Figure 8. Bit Stream Formats for Two Devices Cascaded
D23
D22 D21 D20
D19 D18
D17 D16 D15 D14 D13 D12 D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
1ST BYTE
SHIFTED IN
2ND BYTE
3RD BYTE
4TH BYTE
h BITS
AND
DIMMER
BIT
h BITS
AND
DIMMER
BIT
5TH BYTE
BANK
5
NIBBLE
BANK
4
NIBBLE
BANK
3
NIBBLE
BANK
2
NIBBLE
BANK
1
NIBBLE
BANK
5
NIBBLE
BANK
4
NIBBLE
BANK
3
NIBBLE
BANK
2
NIBBLE
BANK
1
NIBBLE
6TH BYTE
DISPLAY REGISTER OF DEVICE 2
IN FIGURE 11
DISPLAY REGISTER OF DEVICE 1
IN FIGURE 11
NOTE: ENABLE (which initially must be inactive high) is kept active–low during the entire 4–byte configuration transfer or 6–byte display
transfer. When ENABLE is brought back high, either a 4– or 6–byte transfer occurs in the cascaded devices, depending on the number
of bytes in the transfer.
Figure 9. 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
5 V SUPPLY
BIT D23 = HIGH (BRIGHTEN LEDs)
WITH D23 = LOW, iOH IS CUT BY ∼50%.
Rx, EXTERNAL RESISTOR (
Ω)
NOTE: Drive current tolerance is approximately
± 15%.


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