ST STLVDS31B User Manual
Features
■ Meets or exceeds the requirements of ANSI
TIA/EIA-644 standard
■ Low voltage differential signaling with typical
output voltage of 350 mV and a 100 Ω load
■ Typical output voltage rise and fall times of
750 ps (400 Mbps)
■ Typical propagation delay times of 1.7 ns
■ Operates from a single 3.3 V supply
■ Power dissipation 25 mW typical per driver at
200 MHz
■ Driver at high impedance when disabled or with
V
= 0 V
CC
■ Pin compatible with the AM26LS31,
SN65LVDS31
■ Low voltage TTL (LVTTL) logic input levels
STLVDS31B
High speed differential line drivers
TSSOP16
transmission media may be printed circuit board
traces, backplanes or cables. The ultimate rate
and distance of data transfer is dependent upon
the attenuation characteristics of the media and
noise coupling to the environment.
Description
The STLVDS31B is a quad differential line drivers
that implements the electrical characteristics of
low voltage differential signaling (LVDS). This
signaling technique lowers the output voltage
levels of 5 V differential standard levels (such as
TIA/EIA-422B) to reduce the power, increase the
switching speeds and allows operations with a
3.3 V supply rail. Any of the four current mode
drivers will deliver a minimum differential output
voltage magnitude of 247 mV into a 100 Ω load
when enabled.
The intended application of this device and
signalling technique is for point-to-point baseband
data transmission over controlled
impedancemedia approximately 100 Ω. The
Table 1. Device summary
Order code Temperature range Package Packaging
STLVDS31BTR - 40 to 85 °C TSSOP16 (tape and reel) 2500 parts per reel
The STLVDS31B is characterized for operation
from - 55 °C to 125 °C.
July 2009 Doc ID 8338 Rev 6 1/15
www.st.com
15
Contents STLVDS31B
Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15 Doc ID 8338 Rev 6
STLVDS31B Pin configuration
1 Pin configuration
Figure 1. Pin connections and functional diagram
Table 2. Pin description
Pin n° Symbol Name and function
1, 7, 9, 15 1A to 4A Driver inputs
2, 6, 10, 14 1Y to 4Y Driver outputs
3, 5, 11, 13 1Z to 4Z Driver outputs
4 G Enable
12 G Enable
8 GND Ground
16 V
CC
Supply voltage
Doc ID 8338 Rev 6 3/15
Pin configuration STLVDS31B
Figure 2. Logic diagram and logic symbol
Table 3. Truth table for receiver
- 100 mV < V
Table 4. Truth table
Input Enables Outputs
AGG
HHXHL
LHXLH
HXLHL
LXLLH
XLHZZ
OPEN H X L H
OPEN X L L H
VID = VA - V
V
≥ 100 mV H
ID
≤ −100 mV L
V
ID
B
< 100 mV ?
ID
OPEN H
YZ
R
L = Low level, H = High Level, X = Don’t care, Z = High Impedance
4/15 Doc ID 8338 Rev 6
STLVDS31B Maximum ratings
2 Maximum ratings
Table 5. Absolute maximum ratings
Symbol Parameter Value Unit
(1)
-0.5 to 4.6 V
T
V
STG
V
CC
I
Supply voltage
DC input voltage -0.5 to (VCC + 0.5) V
Storage temperature range -65 to +150 °C
1. All voltages except differential I/O bus voltage, are with respect to the network ground terminal.
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 6. Recommended operating conditions
Symbol Parameter Min. Typ. Max. Unit
V
CC
V
IH
V
ILI
T
A
Supply voltage 3.0 3.3 3.6 V
HIGH level input voltage 2.0 V
LOW level input voltage 0.8 V
Operating temperature range -40 85 °C
Doc ID 8338 Rev 6 5/15
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