isl6422b Intersil Corporation, isl6422b Datasheet - Page 8

• Manufacturer Part Number: isl6422b
• Description: Dual Output Lnb Supply And Control Voltage Regulator With I2c Interface For Advanced Satellite Set-top Box Designs
• Manufacturer: Intersil Corporation

Tone Waveform
NOTES:
Typical Performance Curves
NOTE: With both channels in simultaneous operation at rated output
\
10. The logic presented to the signal pin TXT1, TXT2 changes the decoder threshold during tone Transmit and Receive. TTH1, TTH2 allows
12. The EXTM1, EXTM2 pins have input thresholds of V
11. The tone rise and fall times are not shown due to resolution of graphics. It is 10µs typ for 22kHz.
MSEL1, MSEL2
VOUT1, VOUT2
EXTM1, EXTM2
threshold control through the I
ENT1, ENT2
I
FIGURE 2. OUTPUT CURRENT DERATING (EPTSSOP)
PIN
PIN
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
I
2
2
C
C
0
22kHz
20
INTERNAL TONE
t
r
= 10µs TYP
TEMPERATURE (°C)
22kHz
8
2
40
C provided that TXT1, TXT2 = 0
EXTERNAL TONE
t
r
= 10µs TYP
60
22kHz
I
OUT
IL
FIGURE 1. TONE WAVEFORM
_
(max) = 0.8V and V
max
80
RETURNS TO NOMINAL VOUT ~1 PERIOD
AFTER THE LAST EXTM RISING EDGE
t >55µs
ISL6422B
22kHz
IH
(min) = 1.7V
FIGURE 3. OUTPUT CURRENT DERATING (6x6 QFN)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
22kHz
20
22kHz
TEMPERATURE (°C)
t
INTERNAL TONE
r
= 10µs TYP
40
60
I
OUT
August 10, 2007
_
max
FN6486.1
80