DS91M125_14 Datasheet, PDF (6/15 Pages) Texas Instruments – 125 MHz 1:4 M-LVDS Repeater with LVDS Input

DS91M125
SNLS290B – AUGUST 2008 – REVISED NOVEMBER 2009
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Switching Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified. ^{(1) (2) (3)}
Symbol
Parameter
Conditions
Min Typ Max Units
DRIVER AC SPECIFICATION
t_PLH
t_PHL
t_SKD1 (t_sk(p))
t_SKD2
t_SKD3
t_SKD4
t_TLH (t_r)
t_THL (t_f)
t_PZH
t_PZL
t_PLZ
t_PHZ
f_MAX
Differential Propagation Delay Low to High
Differential Propagation Delay High to Low
Pulse Skew |t_PLHD − t_PHLD| ^{(4) (5)}
Channel-to-Channel Skew ^{(6) (5)}
Part-to-Part Skew ^{(7) (5)}
Part-to-Part Skew ⁽⁸⁾
Rise Time ⁽⁵⁾
Fall Time ⁽⁵⁾
Enable Time (Z to Active High)
Enable Time (Z to Active Low )
Disable Time (Active Low to Z)
Disable Time (Active High to Z)
Maximum Operating Frequency ⁽⁵⁾
R_L = 50Ω, C_L = 5 pF,
C_D = 0.5 pF
Figure 6 Figure 7
R_L = 50Ω, C_L = 5 pF,
C_D = 0.5 pF
Figure 8 Figure 9
3.0 5.5 8.5 ns
3.0 5.5 8.5 ns
65 350 ps
65 400 ps
2.2 2.5 ns
5.5 ns
1.1 2.0 3.0 ns
1.1 2.0 3.0 ns
6
11
ns
6
11
ns
6
11
ns
6
11
ns
125
MHz
(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.
(2) Typical values represent most likely parametric norms for V_DD = +3.3V and T_A = +25°C, and at the Recommended Operation Conditions
at the time of product characterization and are not guaranteed.
(3) C_L includes fixture capacitance and C_D includes probe capacitance.
(4) t_SKD1, |t_PLHD − t_PHLD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative
going edge of the same channel.
(5) Specification is guaranteed by characterization and is not tested in production.
(6) t_SKD2, Channel-to-Channel Skew, is the difference in propagation delay (t_PLHD or t_PHLD) among all output channels.
(7) t_SKD3, Part-to-Part Skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This
specification applies to devices at the same V_DD and within 5°C of each other within the operating temperature range.
(8) t_SKD4, Part-to-Part Skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices
over recommended operating temperature and voltage ranges, and across process distribution. t_SKD4 is defined as |Max − Min|
differential propagation delay.
Test Circuits and Waveforms
C_L
A
Power Supply
Power Supply
DI+
D
DI-
R_L/2
V_OS
V_AB
C_L
R_L/2
Driver ENABLED
C_L ^B
Figure 1. Differential Driver Test Circuit
6
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