DS90LT012AQ Datasheet, PDF (3/8 Pages) National Semiconductor (TI) – Automotive LVDS Differential Line Receiver

Switching Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Notes 6, 8, 9, 10)
Symbol
Parameter
Conditions
Min Typ Max Units
t_PHLD
t_PLHD
t_SKD1
t_SKD3
t_SKD4
t_TLH
t_THL
f_MAX
Differential Propagation Delay High to Low
Differential Propagation Delay Low to High
Differential Pulse Skew |t_PHLD − t_PLHD| (Note 11)
Differential Part to Part Skew (Note 12)
Differential Part to Part Skew (Note 13)
Rise Time
Fall Time
Maximum Operating Frequency (Note 14)
C_L = 15 pF
V_ID = 200 mV
(Figure 1 and Figure 2)
1.0 1.8 3.5 ns
1.0 1.7 3.5 ns
0
100 400 ps
0
0.3 1.0 ns
0
0.4 2.5 ns
350 800 ps
175 800 ps
250
MHz
Note 4: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 5: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise
specified (such as V_ID).
Note 6: All typicals are given for: V_DD = +3.3V and T_A = +25°C.
Note 7: Output short circuit current (I_OS) is specified as magnitude only, minus sign indicates direction only. Only one output should be shorted at a time, do not
exceed maximum junction temperature specification.
Note 8: These parameters are guaranteed by design. The limits are based on statistical analysis of the device performance over PVT (process, voltage,
temperature) ranges.
Note 9: C_L includes probe and jig capacitance.
Note 10: Generator waveform for all tests unless otherwise specified: f = 1 MHz, Z_O = 50Ω, t_r and t_f (0% to 100%) ≤ 3 ns for IN±.
Note 11: t_SKD1 is the magnitude difference in differential propagation delay time between the positive-going-edge and the negative-going-edge of the same
channel.
Note 12: t_SKD3, part to part skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices at the same
V_DD and within 5°C of each other within the operating temperature range.
Note 13: t_SKD4, part to part skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices over the
recommended operating temperature and voltage ranges, and across process distribution. t_SKD4 is defined as |Max − Min| differential propagation delay.
Note 14: f_MAX generator input conditions: t_r = t_f < 1 ns (0% to 100%), 50% duty cycle, differential (1.05V to 1.35 peak to peak). Output criteria: 60%/40% duty
cycle, V_OL (max 0.4V), V_OH (min 2.4V), load = 15 pF (stray plus probes).
Parameter Measurement Information
30063903
FIGURE 1. Receiver Propagation Delay and Transition Time Test Circuit
30063904
FIGURE 2. Receiver Propagation Delay and Transition Time Waveforms
3
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