Datasheet

6 ______________________________________________________________________________________
MAX3815A
TMDS Digital Video Equalizer for
HDMI/DVI Cables
Pin Description
PIN NAME FUNCTION
1, 4, 5, 8, 9,
12, 13, 16, 38
V
CC
Supply Voltage. All pins must be connected to V
CC
.
2 RX0_IN- Negative Data Input, CML
3 RX0_IN+ Positive Data Input, CML
6 RX1_IN- Negative Data Input, CML
7 RX1_IN+ Positive Data Input, CML
10 RX2_IN- Negative Data Input, CML
11 RX2_IN+ Positive Data Input, CML
14 RXC_IN+ Positive Clock Input, CML
15 RXC_IN- Negative Clock Input, CML
17 EQCONTROL
Equalizer Control. This pin allows the user to control the equalization level of the MAX3815A.
Connect the pin to GND for automatic operation. Set the voltage to V
CC
- 1V for minimum
equalization, or set the voltage between V
CC
- 1V and V
CC
for manual equalization. See the
Applications Information section for more information.
18
CLKLOS
Loss-of-Clock Signal Output, LVTTL Open Collector. This pin asserts low upon loss of the input
TMDS clock from the cable. Connect pin to V
CC
through a 4.7kω resistor.
19 N.C. Not Connected. This pin is not internally connected.
20, 23, 24, 25,
28, 29, 32, 33,
36, 37
GND Ground
21 RXC_OUT- Negative Clock Output, CML
22 RXC_OUT+ Positive Clock Output, CML
26 RX2_OUT+ Positive Data Output, CML
27 RX2_OUT- Negative Data Output, CML
30 RX1_OUT+ Positive Data Output, CML
31 RX1_OUT- Negative Data Output, CML
34 RX0_OUT+ Positive Data Output, CML
35 RX0_OUT- Negative Data Output, CML
39 OUTLEVEL
Output-Level Control Input
• HIGH: Standard swing (1000mV
P-P
differential)
• OPEN: Standard swing (900mV
P-P
differential) with external 267ω back termination resistor
(see Figure 4)
• LOW: One-half standard swing (500mV
P-P
differential)
40
OUTON
Output-Enable Control Input, LVTTL. This input enables the CML outputs when forced low and
sets a differential logic zero when forced high.
41, 43, 44 VCC_T Reserved. Must be connected to V
CC
for normal operation.
42 GND_T Reserved. Must be connected to GND for normal operation.
45–48 RES Reserved. Must be left open for normal operation.
— EP
Exposed Pad. The exposed pad must be soldered to the circuit-board ground for proper
thermal and electrical operation.