Datasheet

MAX3845
DVI/HDMI 2:4 TMDS Fanout Switch and
Cable Driver
_______________________________________________________________________________________ 3
Note 1: AC specifications are guaranteed by design and characterization.
Note 2: Test pattern is a 2
10
- 1 PRBS + 20 ones + 2
10
- 1 PRBS (inverted) + 20 zeros.
Note 3: Test pattern is a 1111 0000 pattern at 1.65Gbps.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.0V to +3.6V, T
A
= -10°C to +85°C. Typical values are at V
CC
= +3.3V, external terminations = 50Ω ±1%, TMDS rate =
250Mbps to 1.65Gbps, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Resistance R
IN
Single-ended 45 50 55 
Input LOS/Mute Threshold Differential peak-peak 150 mV
Deassert mute 1.2
Input LOS/Mute Response Time
Assert mute 0.6
μs
Input Return Loss Differential,  1.6GHz 19 dB
CML OUTPUTS (CABLE SIDE)
No preemphasis, no back termination,
OUT_LEVEL = low
900 1050 1200
Differential-Output Voltage Swing V
OD
No preemphasis, 200 back termination,
OUT_LEVEL = high
825 925 1050
mV
P-P
Output-Voltage High V
OH
Single-ended, no back termination V
CC
- 10 V
CC
+ 10
Output Voltage During Power-
Down
V
OFF
Single-ended, PWRDWN_x = low or
V
CC
= 0V
V
CC
- 10 V
CC
+ 10
mV
Rise/Fall Time 20% to 80% (T
A
= 0°C to +85°C) 75 90 140
Intrapair Skew 12 40
Interpair Skew
Worst case among A, B, C, and D of an
output
35 60
ps
CONTROL INTERFACE
LVTTL Input High Voltage V
IH
2.0
All except IN_SELx pins 1.0
LVTTL Input Low Voltage V
IL
IN_SELx pins 0.8
V
LVTTL Input High Current V
IH(MIN)
< V
IN
< V
IH(MAX)
100
All except
OUT_LEVEL pin
150
LVTTL Input Low Current V
IL(MIN)
< V
IN
< V
IL(MAX)
OUT_LEVEL pin 500
μA
HOTPLUGx Input High Voltage Typical input 30k to GND V
CC
- 0.2 5.5
HOTPLUGx Input Low Voltage 1.5
V