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): 2/22頁
文件大?。?/td> 2258K
代理商: MC14489B
MC14489B
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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Functional operation should be restricted to the limits in the Electrical Characteristics
tables or Pin Descriptions section.
θ
JA
Device Thermal Resistance,
Junction–to–Ambient (see Thermal
Considerations section)
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– 40
10
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Pins 1, 2, 4 – 7, 19, 20 Sourcing
(Includes Pin 8)
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DC Input Current — per Pin
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mA
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Plastic DIP
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90
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C/W
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10 Seconds
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Lead Temperature, 1 mm from Case for
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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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