參數(shù)資料
型號(hào): MC14489P
廠商: MOTOROLA INC
元件分類: 顯示驅(qū)動(dòng)器
英文描述: Digital Signal Processor 181-CPGA -55 to 125
中文描述: LED DISPLAY DRIVER, PDIP20
封裝: PLASTIC, DIP-20
文件頁(yè)數(shù): 2/20頁(yè)
文件大小: 303K
代理商: MC14489P
MC14489
2
MOTOROLA
BLOCK DIAGRAM
1
BitGrabber
CONFIGURATION REGISTER
8 BITS
Rx
DATA OUT
8
2
20
12
BitGrabber
DISPLAY REGISTER
24 BITS
NIBBLE MUX AND
DECODER ROM
ANODE DRIVERS
(CURRENT SOURCES)
BANK SWITCHES (FETs)
19
4
5
6
7
a
b
DATA IN
c
d
e
f
g
h
24–1/2–STAGE
SHIFT REGISTER
11
10
7
4
4
4
4
4
4
4
4
4
4
4
4
18
POR
9
13
15
16
17
5
5
CLOCK
ENABLE
OSCILLATOR AND
CONTROL LOGIC
BANK 1 BANK 2 BANK 3 BANK 4 BANK 5
PIN 3 = VDD
PIN 14 = VSS
h
DIM/BRIGHT
BLANK
a TO g
D
C
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Pins 1, 2, 4 – 7, 19, 20 Sourcing
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– 40
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JA
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Considerations section)
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Plastic DIP
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90
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Functional operation should be restricted to the limits in the Electrical Characteristics
tables or Pin Descriptions section.
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This device contains protection circuitry to
guard against damage due to high static volt-
ages or electric fields. However, precautions
must be taken to avoid applications of any volt-
age higher than maximum rated voltages to this
high–impedance circuit. For proper operation,
Vin and Vout should be constrained to the range
VSS
(Vin or Vout)
VDD.
Unused inputs must always be tied to an ap-
propriate logic voltage level (e.g., either VSS or
VDD). Unused outputs must be left open.
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