SN65LVDS250
SN65LVDT250
www.ti.com
SLLS594B–MARCH 2004–REVISED OCTOBER 2004
LVDS 4x4 CROSSPOINT SWITCH
FEATURES
SN65LVDS250DBT ( Marked as LVDS250)
SN65LVDT250DBT ( Marked as LVDT250)
(TOP VIEW)
•
Greater Than 2.0 Gbps Operation
•
Nonblocking Architecture Allows Each
Output to be Connected to Any Input
S10
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
1
VCC
GND
1Y
S11
1A
2
•
•
Pk-Pk Jitter:
3
– 60 ps Typical at 2.0 Gbps
– 110 ps Typical at 2.5 Gbps
1B
4
1Z
S20
S21
2A
5
1DE
2Y
2Z
2DE
GND
VCC
GND
3Y
6
Compatible With ANSI TIA/EIA-644-A LVDS
Standard
7
2B
8
GND
VCC
GND
3A
9
•
•
•
•
Available Packaging 38-Pin TSSOP
10
11
12
13
14
15
16
17
18
19
25 mV of Input Voltage Threshold Hysteresis
Propagation Delay Times: 800 ps Typical
3B
3Z
3DE
4Y
Inputs Electrically Compatible With LVPECL,
CML and LVDS Signal Levels
S30
S31
4A
4B
S40
S41
•
•
•
Operates From a Single 3.3-V Supply
Low Power: 110 mA Typical
4Z
4DE
GND
VCC
Integrated 110-Ω Line Termination Resistors
Available With SN65LVDT250
APPLICATIONS
EYE PATTERN
•
•
•
•
Clock Buffering/Clock Muxing
Wireless Base Stations
High-Speed Network Routing
Telecom/Datacom
DESCRIPTION
The SN65LVDS250 and SN65LVDT250 are 4x4
nonblocking crosspoint switches in a flow-through
pin-out allowing for ease in PCB layout. Low-voltage
differential signaling (LVDS) is used to achieve a
high-speed data throughput while using low power.
Each of the output drivers includes a 4:1 multiplexer
to allow any input to be routed to any output. Internal
signal paths are fully differential to achieve the high
signaling speeds while maintaining low signal skews.
The SN65LVDT250 incorporates 110-Ω termination
resistors for those applications where board space is
a premium.
76 − ps/div
V
= 1.2 V
IC
|V | = 200 mV
ID
2 Gbps
23
Input = PRBS 2 −1
= 3.3 V
V
CC
The SN65LVDS250 and SN65LVDT250 are
characterized for operation from -40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.