Electrical characteristics (continued), Timing characteristics – Rainbow Electronics MAX6975 User Manual
Page 3
MAX6974/MAX6975
24-Output PWM LED Drivers
for Message Boards
_______________________________________________________________________________________
3
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.
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
V
OCD
200
mV
Output Voltage Slew Time
R0–R7, G0–G7, B0–B7
80% to 20%, load = 50pF,
calibration DACs set to 0xFF
100
ns
T
A
= +85°C
28
30
32
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
= T
MIN
to T
MAX
26
34
mA
T
A
= +125°C
(Note 3)
±0.7
2.7
T
A
= +85°C
±0.7
2
Port-to-Port Current Matching
R0–R7, G0–G7, B0–B7
ΔI
SINK
V
DD
= 3.3V, V
O
= 1.2V,
calibration DACs set to 0xFF
I
SINK
= 30mA (Note 2)
T
A
= -40°C
(Note 3)
±0.9
3.3
%
T
A
= +85°C
0.3
1.15
Output Load Regulation
ΔI
OLR
V
D D
= 3.3V , V
O
= 1.2V to 3.0V ,
calibration DACs set to 0x80,
I
SINK
= 18mA
T
A
= T
MIN
to T
MAX
1.5
mA/V
T
A
= +85°C
0.6
1.7
Output Power-Supply Rejection
ΔI
OPSR
V
D D
= 3.0 V to 3.6V , V
O
= 1.2V ,
calibration DACs set to 0x80,
I
SINK
= 18mA
T
A
= T
MIN
to T
MAX
2.0
mA/V
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
CLKI_ Input Frequency
f
CLKI
33
MHz
CLKI_ Duty Cycle
40
60
%
CLKO_ Output Delay
t
PD-CLKO
16
ns
DIN_ Setup Time
t
SU-DIN
0.5
ns
DIN_ Hold Time
t
HD-DIN
5
ns
DOUT_ Output Delay
t
PD-DOUT
15
ns
LOADO Output Delay
t
PD-LOADO
18
ns
LOADI Hold Time
t
HD-LOADI
8
ns
Watchdog Period
When enabled
40
125
300
ms
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)