MAX1739/MAX1839
†
Wide Brightness Range
CCFL Backlight Controllers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 8.2V, V
SH
/SUS = V
SH
= 5.5V, MINDAC = GND, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
ANALOG INTERFACE BRIGHTNESS CONTROL (MODE connected to REF or GND )
CRF/SDA, CRF Input Range 2.7 5.5 V
V
CRF/SDA
= V
CRF
= 5.5V 20 µA
CRF/SDA, CRF Input Current
V
CRF/SDA
= V
CRF
= 5.5V, SH/SUS = SH = 0 -1 1 µA
CTL/SCL, Input Range MAX1739 0
SH Input Low Voltage 0.8 V
SH Input High Voltage 2.1 V
SH/SUS Input Hysteresis when
Transitioning In and Out of Shutdown
150 mV
SH Input Bias Current -1 1 µA
SYSTEM MANAGEMENT BUS BRIGHTNESS CONTROL (MAX1739, MODE connected to V
L
, see Figures 12 and 13)
CRF/SDA, CTL/SCL, SH/SUS Input
0.8 V
CRF/SDA, CTL/SCL, SH/SUS Input
2.1 V
CRFSDA, CTLSCL Input Hysteresis 300 mV
CRF/SDA, CTL/SCL, SH/SUS Input
-1 1 µA
CRF/SDA Output Low Sink Current V
CRF/SDA
= 0.4V 4 mA
CTL/SCL Serial Clock High Period t
HIGH
4µs
CTL/SCL Serial Clock Low Period t
LOW
4.7 µs
Start Condition Setup Time t
SU:STA
4.7 µs
Start Condition Hold Time t
HD:STA
4µs
C RF/S D A V al id to C TL/S C L Ri si ng E d g e
S etup Ti m e, S l ave C l ocki ng i n D ata
t
SU:DAT
250 ns
CTL/SCL Falling Edge to CRF/SDA
Transition
t
HD:DAT
0ns
CTL/SCL Falling Edge to CRF/SDA
Valid, Reading Out Data
t
DV
1µs
