Datasheet

DS92LX2121, DS92LX2122
www.ti.com SNLS330I –MAY 2010–REVISED APRIL 2013
Recommended Operating Conditions (continued)
Min Nom Max Units
Supply Noise
(1)
V
DDn
(1.8 V) 25 mV
P-P
V
DDIO
(1.8 V) 25 mV
P-P
V
DDIO
(3.3 V) 50 mV
P-P
Operating Free Air Temperature (T
A
) -40 25 85 °C
Input Clock Rate 10 50 MHz
(1) Supply noise testing was done with minimum capacitors (as shown on Figures 35, 36) on the PCB. A sinusoidal signal is AC coupled to
the V
DDn
(1.8V) supply with amplitude = 25 mVp-p measured at the device V
DDn
pins. Bit error rate testing of input to the Ser and output
of the Des with 10 meter cable shows no error when the noise frequency on the Ser is less than 1 MHz. The Des on the other hand
shows no error when the noise frequency is less than 750 kHz.
Serializer Electrical Characteristics
(1)(2)(3)
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
LVCMOS DC SPECIFICATIONS 3.3V I/O (TX INPUTS, RX OUTPUTS, GPIO, CONTROL INPUTS AND OUTPUTS)
V
IH
High Level Input Voltage VIN = 3.0V to 3.6V 2.0 V
IN
V
V
IL
Low Level Input Voltage VIN = 3.0V to 3.6V GND 0.8 V
I
IN
Input Current VIN = 0V or 3.6V -20 ±1 +20 µA
VIN = 3.0V to 3.6V
V
OH
High Level Output Voltage V
DDIO
= 3.0V to 2.4 V
DDIO
V
3.6V
V
OL
Low Level Output Voltage V
DDIO
= 3.0V to GND 0.4 V
3.6V
I
OH
= +4mA
I
OS
Output Short Circuit Current V
OUT
= 0V Serializer mA
-24
GPO Outputs
Deserializer
LVCMOS -39
Outputs
Register
RPWDNB = 0V, Address
I
OZ
TRI-STATE Output Current -20 +20 µA
V
OUT
= 0V or V
DD
(OSS_SEL =
0)
LVCMOS DC SPECIFICATIONS 1.8V I/O (TX INPUTS, RX OUTPUTS, GPIO, CONTROL INPUTS AND OUTPUTS)
V
IH
High Level Input Voltage V
IN
= 1.71V to 0.65 V
IN
V
IN
+ 0.3
1.89V
V
V
IL
Low Level Input Voltage V
IN
= 1.71V to GND 0.35 V
IN
1.89V
I
IN
Input Current V
IN
= 0V or 1.89V -20 ±1 +20 µA
V
IN
= 1.71V to
1.89V
V
OH
High Level Output Voltage V
DDIO
= 1.71V to V
DDIO
- 0.45 V
DDIO
1.89V V
I
OH
= −4mA
V
OL
Low Level Output Voltage V
DDIO
= 1.71V to GND 0.45 V
1.89V
I
OL
= +4 mA
(1) The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as
otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and
are not guaranteed.
(2) Current into device pins is defined as positive. Current out of a device pin is defined as negative. Voltages are referenced to ground
except VOD, ΔVOD, VTH and VTL which are differential voltages.
(3) Typical values represent most likely parametric norms at 1.8V or 3.3V, T
A
= +25°C, and at the Recommended Operation Conditions at
the time of product characterization and are not guaranteed.
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