6277 Datasheet, PDF (5/12 Pages) Allegro MicroSystems – 8-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER

6277
8-BIT SERIAL-INPUT,
CONSTANT-CURRENT
LATCHED LED DRIVER
SWITCHING CHARACTERISTICS at T_A = 25°C, V_DD = V_IH = 5 V, V_CE = 0.4 V, V_IL = 0 V,
R_EXT = 470 Ω, I_O = 40 mA, V_L = 3 V, R_L = 65 Ω, C_L = 10.5 pF.
Characteristic
Propagation Delay Time
Propagation Delay Time
Output Fall Time
Output Rise Time
Symbol
t_pHL
t_pLH
t_f
t_r
Test Conditions
CLOCK-OUT_n
LATCH-OUT_n
ENABLE-OUT_n
CLOCK-SERIAL DATA OUT₁
CLOCK-OUT_n
LATCH-OUT_n
ENABLE-OUT_n
CLOCK-SERIAL DATA OUT₂
90% to 10% voltage
10% to 90% voltage
Limits
Min. Typ. Max.
Unit
– 350 1000
ns
– 350 1000
ns
– 350 1000
ns
–
80 110
ns
– 300 1000
ns
– 400 1000
ns
– 380 1000
ns
–
80 110
ns
150 250 1000
ns
150 250 600
ns
RECOMMENDED OPERATING CONDITIONS
Characteristic
Supply Voltage
Output Voltage
Output Current
Logic Input Voltage
Clock Frequency
Symbol
V_DD
V_O
I_O
I_OH
I_OL
V_IH
V_IL
f_CK
Conditions
Continuous, any one output
SERIAL DATA OUT
SERIAL DATA OUT
Cascade operation
Min. Typ. Max.
4.5 5.0 5.5
–
1.0 4.0
–
– 150
–
– -1.0
–
–
1.0
0.7V_DD –
–
–
– 0.3V_DD
–
–
10
Unit
V
V
mA
mA
mA
V
V
MHz
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