Datasheet
MAX3845
DVI/HDMI 2:4 TMDS Fanout Switch and
Cable Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage Range (V
CC
) ................................-0.3V to +5.5V
Voltage Range at HOTPLUGx Pins ......................-0.3V to +6.0V
Voltage Range at LVTTL, LVCMOS, I/O Pins .......-0.3V to +5.5V
Voltage Range at CML Output Pins ......................-0.3V to +5.5V
Voltage Range at CML Input Pins
(CML short to GND duration < 1s)....................-0.3V to +4.0V
Voltage Between Any Input CML I/O
Complementary Pair ......................................................±3.3V
Voltage Range at LOSMUTE_EN ..........................-0.3V to +5.5V
Voltage Between Any Output CML I/O
Complementary Pair.......................................................±3.6V
Continuous Power Dissipation (T
A
= +70°C)
100-Pin TQFP-EP (derate 45.5mW/°C
above +70°C) ............................................................3636mW
Operating Junction Temperature .....................-55°C to +150°C
Storage Temperature Range ............................-55°C to +150°C
Die Attach Temperature ..................................................+400°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Supply Current I
CC
PREEMPH[1:4] = high, OUT_LEVEL = high,
current into V
CC
pins, 1200mV
P-P
= V
IN
454 626 mA
Supply-Noise Tolerance DC to 500kHz 50 mV
P-P
SKIN-EFFECT EQUALIZER PEAKING
Fixed Rx Equalizer
Compensation
Gain at 825MHz 1
PREEMPHx pin = low 0
PREEMPHx pin = open 3
Settable Tx Preemphasis
PREEMPHx pin = high 6
dB
JITTER PERFORMANCE
0dB cable loss, no
preemphasis
0.04 0.12
3dB cable loss, +3dB
preemphasis
0.05 0.12
200 back
termination
6dB cable loss, +6dB
preemphasis
0.07 0.12
0dB cable loss, no
preemphasis
0.07 0.2
3dB cable loss, +3dB
preemphasis
0.08 0.2
Residual Deterministic Jitter
(Measured at end of cable
having ideal skin-effect loss
and connectors, e.g., Gore Twin
Coax, Amphenol Skewclear
Twinax, with SMA connectors)
(Note 2)
No back
termination
6dB cable loss, +6dB
preemphasis
0.10 0.2
UI
Residual Random Jitter (Note 3) Measured with source T
r
/T
f
= 250ps 1.5 2 ps
RMS
CML INPUTS (SOURCE SIDE)
Differential-Input Voltage Swing V
ID
At cable input 400 2000 mV
P-P
Common-Mode Input Voltage V
CM
V
CC
- 1000 V
CC
Input Voltage When Disconnected V
CC
- 10 V
CC
+ 10
mV