MAX6974 查看數據表（PDF） - Maxim Integrated
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MAX6974 Datasheet PDF : 23 Pages
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24-Output PWM LED Drivers
for Message Boards
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 3.3V, TA = +85°C.) (Note 1)
PARAMETER
Output Slew Time LOADO
Output Low Voltage MUX_
Open-Circuit Detection
Output Voltage Slew Time
R0–R7, G0–G7, B0–B7
Full-Scale Port Output Current
R0–R7, G0–G7, B0–B7
Port-to-Port Current Matching
R0–R7, G0–G7, B0–B7
SYMBOL
CONDITIONS
20% to 80%, 80% to 20%, load = 10pF
VOLM
VOCD
ISINK = 40mA
80% to 20%, load = 50pF,
calibration DACs set to 0xFF
ISINKFS
VDD = 3.3V, VO = 1.2V,
calibration DACs set to 0xFF
TA = +85°C
TA = +125°C
TA = TMIN to TMAX
∆ISINK
VDD = 3.3V, VO = 1.2V,
calibration DACs set to 0xFF
ISINK = 30mA (Note 2)
TA = +125°C
(Note 3)
TA = +85°C
TA = -40°C
(Note 3)
MIN
29.4
29.10
28.2
TYP
3
200
30
0.5
0.3
±0.9
MAX
0.4
UNITS
ns
V
mV
100 ns
30.6
30.90 mA
31.8
1.7
1
%
3.0
Output Load Regulation
∆IOLR
VDD = 3.3V, VO = 1.2V to 3.0V, TA = +85°C
calibration DACs set to 0x80,
ISINK = 18mA
TA = TMIN to TMAX
0.3 1.15
mA/V
1.5
Output Power-Supply Rejection
∆IOPSR
VDD = 3.0 V to 3.6V, VO = 1.2V, TA = +85°C
calibration DACs set to 0x80,
ISINK = 18mA
TA = TMIN to TMAX
0.6 1.7
mA/V
2.0
TIMING CHARACTERISTICS
(VDD = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at 3.3V, TA = +85°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
CLKI_ Input Frequency
fCLKI
CLKI_ Duty Cycle
40
CLKO_ Output Delay
DIN_ Setup Time
DIN_ Hold Time
DOUT_ Output Delay
LOADO Output Delay
LOADI Hold Time
Watchdog Period
tPD-CLKO
tSU-DIN
tHD-DIN
tPD-DOUT
tPD-LOADO
tHD-LOADI
When enabled
0.5
5
11
40 125
Note 1: All parameters tested at TA = +85°C. Specifications over temperature are guaranteed by design.
Note 2: Specification limits apply to devices at the same TA for TA = TMIN to TMAX.
Note 3: Guaranteed by design.
MAX
33
60
19
18
21
300
UNITS
MHz
%
ns
ns
ns
ns
ns
ns
ms
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