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A6277ELW Datasheet(PDF) 5 Page - Allegro MicroSystems

Part # A6277ELW
Description  8-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A6277ELW Datasheet(HTML) 5 Page - Allegro MicroSystems

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6277
8-BIT SERIAL-INPUT,
CONSTANT-CURRENT
LATCHED LED DRIVER
www.allegromicro.com
5
RECOMMENDED OPERATING CONDITIONS
Characteristic
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
VDD
4.5
5.0
5.5
V
Output Voltage
VO
–1.0
4.0
V
Output Current
IO
Continuous, any one output
–
–
150
mA
IOH
SERIAL DATA OUT
–
–
-1.0
mA
IOL
SERIAL DATA OUT
–
–
1.0
mA
Logic Input Voltage
VIH
0.7VDD
––
V
VIL
–
–
0.3VDD
V
Clock Frequency
fCK
Cascade operation
–
–
10
MHz
SWITCHING CHARACTERISTICS at TA = 25
°C, V
DD = VIH = 5 V, VCE = 0.4 V, VIL = 0 V,
REXT = 470
Ω, IO = 40 mA, VL = 3 V, RL = 65 Ω, CL = 10.5 pF.
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Propagation Delay Time
tpHL
CLOCK-OUTn
–
350
1000
ns
LATCH-OUTn
–
350
1000
ns
ENABLE-OUTn
–
350
1000
ns
CLOCK-SERIAL DATA OUT1
–
80
110
ns
Propagation Delay Time
tpLH
CLOCK-OUTn
–
300
1000
ns
LATCH-OUTn
–
400
1000
ns
ENABLE-OUTn
–
380
1000
ns
CLOCK-SERIAL DATA OUT2
–
80
110
ns
Output Fall Time
tf
90% to 10% voltage
150
250
1000
ns
Output Rise Time
tr
10% to 90% voltage
150
250
600
ns


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