STLVDS31
STLVDS3487
HIGH SPEED
DIFFERENTIAL LINE DRIVERS
s
s
s
s
s
s
s
s
s
MEETS OR EXCEEDS THE
REQUIREMENTS OF ANSI TIA/EIA-644
STANDARD
LOW VOLTAGE DIFFERENTIAL SIGNALING
WITH TYPICAL OUTPUT VOLTAGE OF
350mV AND A 100Ω LOAD
TYPICAL OUTPUT VOLTAGE RISE AND
FALL TIMES OF 750ps (400Mbps)
TYPICAL PROPAGATION DELAY TIMES OF
1.7ns
OPERATES FROM A SINGLE 3.3V SUPPLY
POWER DISSIPATION 25mW TYPICAL PER
DRIVER AT 200MHz
DRIVER AT HIGH IMPEDANCE WHEN
DISABLED OR WITH V
CC
=0V
PIN COMPATIBLE WITH THE AM26LS31,
SN65LVD31, MC3487 AND SN65LVD3487
LOW VOLTAGE TTL (LVTTL) LOGIC INPUT
LEVELS
SOP
TSSOP
DESCRIPTION
The STLVDS31 and STLVDS3487 are quad
differential line drivers that implements the
electrical characteristics of low voltage differential
signaling (LVDS). This signaling technique lowers
the output voltage levels of 5V differential
standard levels (such as TIA/EIA-422B) to reduce
the power, increase the switching speeds and
ORDERING CODES
Type
STLVDS31BD
STLVDS31BDR
STLVDS31BTR
STLVDS3487BD
STLVDS3487BDR
STLVDS3487BTR
Temperature
Range
-40 to
-40 to
-40 to
-40 to
-40 to
-40 to
85 °C
85 °C
85 °C
85 °C
85 °C
85 °C
allows operations with a 3.3V supply rail. Any of
the four current mode drivers will deliver a
minimum differential output voltage magnitude of
247mV into a 100Ω load when enabled.
The indended application of this device and
signalling tecnique is for point-to-point baseband
data transmission over controlled impedance
media approximately 100Ω. The 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 enviroment.
The
STLVDS31
and
STLVDS3487
are
characterized for operation from -40°C to 85°C .
Package
SO-16 (Tube)
SO-16 (Tape & Reel)
TSSOP16 (Tape & Reel)
SO-16 (Tube)
SO-16 (Tape & Reel)
TSSOP16 (Tape & Reel)
Comments
50parts per tube / 20tube per box
2500 parts per reel
2500 parts per reel
50parts per tube / 20tube per box
2500 parts per reel
2500 parts per reel
January 2002
1/11
STLVDS31/STLVDS3487
PIN CONFIGURATION
STLVDS31
STLVDS3487
STLVDS31 PIN DESCRIPTION
PlN N°
1, 7, 9, 15
2, 6, 10, 14
3, 5, 11, 13
4
12
8
16
SYMBOL
1A to 4A
1Y to 4Y
1Z to 4Z
G
G
GND
V
CC
NAME AND FUNCTION
Driver Inputs
Driver Outputs
Driver Outputs
Enable
Enable
Ground
Supply Voltage
STLVDS3487 PIN DESCRIPTION
PlN N°
1, 7, 9, 15
2, 6, 10, 14
3, 5, 11, 13
4
12
8
16
SYMBOL
1A to 4A
1Y to 4Y
1Z to 4Z
1,2EN
3,4EN
GND
V
CC
NAME AND FUNCTION
Driver Inputs
Driver Outputs
Driver Outputs
Drivers 1 and 2 Enable
Drivers 3 and 4 Enable
Ground
Supply Voltage
LOGIC DIAGRAM AND LOGIC SYMBOL FOR STLVDS31
2/11
STLVDS31/STLVDS3487
LOGIC DIAGRAM AND LOGIC SYMBOL FOR STLVDS3487
STLVDS31 TRUTH TABLE
INPUT
A
H
L
H
L
X
OPEN
OPEN
ENABLES
G
H
H
X
X
L
H
X
G
X
X
L
L
H
X
L
OUTPUTS
Y
H
L
H
L
Z
L
L
Z
L
H
L
H
Z
H
H
STLVDS3487 TRUTH TABLE
INPUT
A
H
L
X
OPEN
ENABLES
EN
H
H
L
H
OUTPUTS
Y
H
L
Z
L
Z
L
H
Z
H
L=Low level, H=High Level, X=Don’t care, Z= High Impedance
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
T
stg
Supply Voltage (Note 1)
DC Input Voltage
Storage Temperature Range
Parameter
Value
-0.5 to 4.6
-0.5 to (V
CC
+ 0.5)
-65 to +150
Unit
V
V
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
Note 1: All voltages except differential I/O bus voltage, are with respect to the network ground terminal.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IH
V
ILI
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
Operating Temperature Range
-40
Parameter
Min.
3.0
2.0
0.8
85
Typ.
3.3
Max.
3.6
Unit
V
V
V
°C
3/11
STLVDS31/STLVDS3487
ELECTRICAL CHARACTERISTICS
(Over recommended operating conditions unless otherwise noted.
All typical values are at T
A
= 25°C, and V
CC
= 3.3V)
Symbol
V
OD
∆V
OD
∆V
OC(SS)
Parameter
Differential Output Voltage
Change in Differential
Output Voltage Between
Logic State
Change in Steady-state
Common Mode Output
Voltage Between Logic
State
Steady-state Common
Mode Output Voltage
Peak to Paek Common
mode Output Voltage
Supply Current
R
L
= 100Ω
Test Conditions
Fig. 2
Min.
247
-50
Typ.
350
Max.
454
50
Unit
mV
mV
Fig. 3
1.125
1.2
1.375
V
V
OC(SS)
V
OC(PP)
I
CC
Fig. 3
-50
80
50
150
20
35
1
20
10
-24
±
12
±
1
±
1
3
mV
mV
mA
mA
mA
µA
µA
mA
mA
µA
µA
pF
V
IN
= 0.8V or 2V, Enabled, No Load
V
IN
= 0.8V or 2V, Enabled, R
L
= 100Ω
V
IN
= 0 or V
CC
, Disabled
11.5
25
0.3
4
0.6
6.1
I
IH
I
IL
I
SC
I
OZ
I
OFF
C
IN
High Level Input Current
Low Level Input Current
V
IH
= 2V
V
IL
= 0.8V
V
OD
= 0
Short Circuit Output Current V
O(Y)
or V
O(Z)
= 0V
High Impedance Output
Current
Power OFF Output Current
Input Capacitance
V
O
= 0 or 2.4V
V
CC
= 0
V
O
= 2.4V
4/11
STLVDS31/STLVDS3487
SWITCHING CHARACTERISTICS
(Unless otherwise noted. Typical values are referred to T
A
= 25°C
and V
CC
= 3.3V)
Symbol
t
PLH
t
PHL
t
r
t
f
t
sk(P)
t
sk(O)
t
PZH
Parameter
Propagation Delay Time,
Low to High Output
Propagation Delay Time,
High to Low Output
Differential Output Signal
Rise Time
Differential Output Signal
Fall Time
Pulse Skew (|t
THL
= t
TLH
|)
R
L
= 100Ω
Fig. 2
Test Conditions
C
L
= 10pF
Min.
0.5
1
0.4
0.4
Typ.
1.4
1.7
0.5
0.5
0.3
0
5.4
Max.
2
2.5
0.6
0.6
0.6
0.3
15
Unit
ns
ns
ns
ns
ns
ns
ns
t
PZL
t
PHZ
t
PLZ
Channel to Channel Output
Skew (note1)
Propagation Delay Time,
Fig. 4
High Impedance to High
Level Output
Propagation Delay Time,
High Impedance to Low
Level Output
Propagation Delay Time,
High Level to High
Impedance Output
Propagation Delay Time,
Low Level to High
Impedance Output
2.5
15
ns
8.1
15
ns
7.3
15
ns
Note 1: t
sk(O)
is the maximum delay time difference between drivers on the same device.
RNote 1: RS-232 IN to TTL-CMOS OUT (from 50% to 50%)
Figure 1 :
Voltage and Current Definitions
5/11
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