DS92LV1224_15 Datasheet, PDF (4/23 Pages) Texas Instruments – 30-66 MHz 10 Bit Bus LVDS Deserializer

DS92LV1224
SNLS189A – APRIL 2005 – REVISED APRIL 2013
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Powerdown
When no data transfer occurs, you can use the Powerdown state. The Serializer and Deserializer use the
Powerdown state, a low power sleep mode, to reduce power consumption. The Deserializer enters Powerdown
when you drive PWRDN and REN low. The Serializer enters Powerdown when you drive PWRDN low. In
Powerdown, the PLL stops and the outputs enter TRI-STATE, which disables load current and reduces supply
current to the milliampere range. To exit Powerdown, you must drive the PWRDN pin high.
Before valid data exchanges between the Serializer and Deserializer, you must reinitialize and resynchronize the
devices to each other. Initialization of the Serializer takes 510 TCLK cycles. The Deserializer will initialize and
assert LOCK high until lock to the Bus LVDS clock occurs.
TRI-STATE
The Serializer enters TRI-STATE when the DEN pin is driven low. This puts both driver output pins (DO+ and
DO−) into TRI-STATE. When you drive DEN high, the Serializer returns to the previous state, as long as all other
control pins remain static (SYNC1, SYNC2, PWRDN, TCLK_R/F).
When you drive the REN pin low, the Deserializer enters TRI-STATE. Consequently, the receiver output pins
(ROUT0–ROUT9) and RCLK will enter TRI-STATE. The LOCK output remains active, reflecting the state of the
PLL.
Table 1. ⁽¹⁾
Maximum
Mean
Minimum
Conditions:
Random Lock Times for the DS92LV1224
40 MHz
66 MHz
26
18
4.5
3.0
0.77
PRBS 2¹⁵, V_CC = 3.3V
0.43
(1) Difference in lock times are due to different starting points in the data pattern with multiple parts.
Units
μs
μs
μs
4
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