Rainbow Electronics MAX1839 - Manual (Page 4)

MAX1739/MAX1839
†
Wide Brightness Range
CCFL Backlight Controllers
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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.)
PARAMETER CONDITIONS MIN TYP MAX UNIT
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
CRF/
SDA
V
CTL Input Range MAX1839 0 CRF V
CTL/SCL, CTL Input Current MODE = REF or GND -1 1 µA
ADC Resolution Guaranteed monotonic 5 Bits
ADC Hysteresis 1 LSB
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 4 µs
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 4 µs
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 0 ns
CTL/SCL Falling Edge to CRF/SDA
Valid, Reading Out Data
t DV 1 µs