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24-Output PWM LED Drivers
for Message Boards
ELECTRICAL CHARACTERISTICS (continued)
(V DD = 3.0V to 3.6V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V DD = 3.3V, T A = +85°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Slew Time LOADO
20% to 80%, 80% to 20%, load = 10pF
3
ns
Output Low Voltage MUX_
V OLM
I SINK = 40mA
0.4
V
Open-Circuit Detection
Output Voltage Slew Time
R0–R7, G0–G7, B0–B7
V OCD
80% to 20%, load = 50pF,
calibration DACs set to 0xFF
200
100
mV
ns
Full-Scale Port Output Current
R0–R7, G0–G7, B0–B7
I SINKFS
V DD = 3.3V, V O = 1.2V,
calibration DACs set to 0xFF
T A = +85°C
T A = +125°C
29.4
29.10
30
30.6
30.90
mA
T A = T MIN to T MAX
28.2
31.8
Port-to-Port Current Matching
R0–R7, G0–G7, B0–B7
Δ I SINK
V DD = 3.3V, V O = 1.2V,
calibration DACs set to 0xFF
I SINK = 30mA (Note 2)
T A = +125°C
(Note 3)
T A = +85°C
T A = -40°C
(Note 3)
0.5
0.3
±0.9
1.7
1
3.0
%
Output Load Regulation
Δ I OLR
V DD = 3.3V, V O = 1.2V to 3.0V, T A = +85°C
calibration DACs set to 0x80,
0.3
1.15
mA/V
I SINK = 18mA
T A = T MIN to T MAX
1.5
Output Power-Supply Rejection
Δ I OPSR
V DD = 3.0V to 3.6V, V O = 1.2V,
calibration DACs set to 0x80,
T A = +85°C
0.6
1.7
mA/V
I SINK = 18mA
T A = T MIN to T MAX
2.0
TIMING CHARACTERISTICS
(V DD = 3.0V to 3.6V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at 3.3V, T A = +85°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLKI_ Input Frequency
CLKI_ Duty Cycle
CLKO_ Output Delay
f CLKI
t PD-CLKO
40
33
60
19
MHz
%
ns
DIN_ Setup Time
DIN_ Hold Time
DOUT_ Output Delay
LOADO Output Delay
LOADI Hold Time
t SU-DIN
t HD-DIN
t PD-DOUT
t PD-LOADO
t HD-LOADI
0.5
5
11
18
21
ns
ns
ns
ns
ns
Watchdog Period
When enabled
40
125
300
ms
Note 1: All parameters tested at T A = +85°C. Specifications over temperature are guaranteed by design.
Note 2: Specification limits apply to devices at the same T A for T A = T MIN to T MAX .
Note 3: Guaranteed by design.
_______________________________________________________________________________________
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