MAX3815ACCM+T Maxim Integrated Products, MAX3815ACCM+T Datasheet - Page 9

• Manufacturer Part Number: MAX3815ACCM+T
• Description: IC DGTL VIDEO EQUALIZER 48TQFP
• Manufacturer: Maxim Integrated Products
• Type: Video Equalizerr

Specifications of MAX3815ACCM+T

• Applications: HDMI, DVI, Receivers
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The loss-of-clock circuitry powers down the part when-
ever there is an absence of a clock signal. This mutes
the output and reduces power consumption to 83mW
whenever the input signal is removed. During power-
down, the MAX3815A’s TMDS output pins go to a high-
impedance state.
The CLKLOS is an open-collector output that requires a
resistive pullup to V
range is 1kω to 10kω (see Figure 3).
The OUTLEVEL pin is a three-state input that allows the
user to select between three output settings. Forcing this
pin high results in the standard output signal level with
no back terminations; leaving the pin open results in a
standard output swing with 267ω differential back termi-
nation resistors. Forcing this pin low results in one-half
standard output signal level.
Using back termination resistance improves signal integ-
rity through absorption of reflections. It also shifts the sin-
gle-ended output voltage high (V
shows the output voltages when using the MAX3815A in
each of its three output configurations.
The EQCONTROL pin allows the user to control the
equalization in one of two ways: forcing the pin to ground
sets the equalizer in automatic equalization mode,
and forcing a voltage between V
manual control of the equalization level. Set to V
maximum boost (long cable). Set to V
mum boost (short cable).
Table 1. Output Settings and Swings
Output Level Control (OUTLEVEL) Input
OUTLEVEL
Equalizer Control (EQCONTROL) Input
Open
High
Low
_______________________________________________________________________________________
CC
for operation. The pullup resistor
Using Back Termination
BACK TERMINATION
H
Open
Open
267I
CC
) and low (V
TMDS Digital Video Equalizer for
- 1V to V
CC
- 1V for mini-
L
CC
). Table 1
CC
allows
DIFFERENTIAL
SWING (mV
for
1000
910
500
Figure 5. Simplified Input Circuit Schematic
Figure 6. Simplified Output Circuit Schematic
P-P )
SUPRESSOR
TRANSIENT
CLAMP
PWRDWN 0
SINGLE-ENDED HIGH
RX_IN+/-
HDMI/DVI Cables
V
CC
(V
MAX3815A
V
V
- 85mV
CC
CC
1
H
)
10mA OUTLEVEL = HIGH
12.5mA OUTLEVEL = OPEN
5mA OUTLEVEL = LOW
MAX3815A
50 Ω
V
CC
SINGLE-ENDED LOW
Interface Models
V
V
V
CC
CC
CC
(V
- 500mV
- 540mV
- 250mV
L
)
RX_OUT+
RX_OUT-
9