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DS92LV090A 9 Channel Bus LVDS Transceiver
December 14, 2007
DS92LV090A
9 Channel Bus LVDS Transceiver
General Description
The DS92LV090A is one in a series of Bus LVDS transceivers
designed specifically for the high speed, low power propri-
etary backplane or cable interfaces. The device operates from
a single 3.3V power supply and includes nine differential line
drivers and nine receivers. To minimize bus loading, the driver
outputs and receiver inputs are internally connected. The
separate I/O of the logic side allows for loop back support.
The device also features a flow through pin out which allows
easy PCB routing for short stubs between its pins and the
connector.
The driver translates 3V TTL levels (single-ended) to differ-
ential Bus LVDS (BLVDS) output levels. This allows for high
speed operation, while consuming minimal power with re-
duced EMI. In addition, the differential signaling provides
common mode noise rejection of ±1V.
The receiver threshold is less than ±100 mV over a ±1V com-
mon mode range and translates the differential Bus LVDS to
standard (TTL/CMOS) levels. (See Applications Information
Section for more details.)
Features
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Bus LVDS Signaling
3.2 nanosecond propagation delay max
Chip to Chip skew ±800ps
Low power CMOS design
High Signaling Rate Capability (above 100 Mbps)
0.1V to 2.3V Common Mode Range for V
ID
= 200mV
±100 mV Receiver Sensitivity
Supports open and terminated failsafe on port pins
3.3V operation
Glitch free power up/down (Driver & Receiver disabled)
Light Bus Loading (5 pF typical) per Bus LVDS load
Designed for Double Termination Applications
Balanced Output Impedance
Product offered in 64 pin TQFP package
High impedance Bus pins on power off (V
CC
= 0V)
Driver Channel to Channel skew (same device) 230ps
typical
■
Receiver Channel to Channel skew (same device) 370ps
typical
Simplified Functional Diagram
10011101
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation
100111
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DS92LV090A
Connection Diagram
10011102
Top View
Order Number DS92LV090ATVEH
See NS Package Number VEH064DB
Pin Descriptions
Pin Name
DO+/RI+
DO−/RI−
D
IN
RO
RE
DE
GND
V
CC
AGND
AV
CC
NC
Pin #
27, 31, 35, 37, 41, 45,
47, 51, 55
26, 30, 34, 36, 40, 44,
46, 50, 54
2, 6, 12, 18, 20, 22, 58,
60, 62
3, 7, 13, 19, 21, 23, 59,
61, 63
17
16
4, 5, 9, 14, 25, 56
10, 15, 24, 57, 64
28, 33, 43, 49, 53
29, 32, 42, 48, 52
1, 8, 11, 38, 39
Input/Output
I/O
I/O
I
O
I
I
Power
Power
Power
Power
N/A
Descriptions
True Bus LVDS Driver Outputs and Receiver Inputs.
Complimentary Bus LVDS Driver Outputs and Receiver Inputs.
TTL Driver Input.
TTL Receiver Output.
Receiver Enable TTL Input (Active Low).
Driver Enable TTL Input (Active High).
Ground for digital circuitry (must connect to GND on PC board). These pins
connected internally.
V
CC
for digital circuitry (must connect to V
CC
on PC board). These pins
connected internally.
Ground for analog circuitry (must connect to GND on PC board). These pins
connected internally.
Analog V
CC
(must connect to V
CC
on PC board). These pins connected
internally.
Leave open circuit, do not connect.
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2
DS92LV090A
Absolute Maximum Ratings
(Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
Enable Input Voltage
(DE, RE)
Driver Input Voltage (D
IN
)
Receiver Output Voltage
(R
OUT
)
Bus Pin Voltage (DO/RI±)
4.0V
−0.3V to (V
CC
+0.3V)
−0.3V to (V
CC
+0.3V)
−0.3V to (V
CC
+0.3V)
−0.3V to +3.9V
θ
jc
Junction Temperature
Storage Temperature Range
Lead Temperature
(Soldering, 4 sec.)
10.9°C/W
+150°C
−65°C to +150°C
260°C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
Receiver Input Voltage
Operating Free Air Temperature
Maximum Input Edge Rate
(Note
6)(20% to 80%)
Data
Control
Min
3.0
0.0
−40
Max
3.6
2.4
+85
Units
V
V
°C
Δt/ΔV
ns/V
ns/V
ESD (HBM 1.5 kΩ, 100 pF)
>4.5 kV
Driver Short Circuit Duration
momentary
Receiver Short Circuit Duration
momentary
Maximum Package Power Dissipation at 25°C
TQFP
1.74 W
Derate TQFP Package
13.9 mW/°C
θ
ja
71.7°C/W
1.0
3.0
DC Electrical Characteristics
Over recommended operating supply voltage and temperature ranges unless otherwise specified (Notes 2, 3)
Symbol
V
OD
ΔV
OD
V
OS
ΔV
OS
V
OH
V
OL
I
OSD
V
OH
Parameter
Output Differential Voltage
V
OD
Magnitude Change
Offset Voltage
Offset Magnitude Change
Driver Output High Voltage
Driver Output Low Voltage
R
L
= 27Ω
R
L
= 27Ω
0.95
Conditions
R
L
= 27Ω,
Figure 1
Pin
DO+/RI+,
DO−/RI−
Min
240
1.1
Typ
300
1.3
5
1.4
1.1
|36|
R
OUT
V
CC
−0.2
V
CC
−0.2
V
CC
−0.2
0.05
−110
DO+/RI+,
DO−/RI−
|75|
|75|
−100
|V
ID
|/2
DE = 0V, RE = 2.4V,
V
IN
= +2.4V or 0V
V
CC
= 0V, V
IN
= +2.4V or 0V
V
IH
V
IL
I
IH
I
IL
V
CL
Minimum Input High Voltage
Maximum Input Low Voltage
Input High Current
Input Low Current
Input Diode Clamp Voltage
V
IN
= V
CC
or 2.4V
V
IN
= GND or 0.4V
I
CLAMP
= −18 mA
D
IN
, DE, RE
2.4 − |
V
ID
|/2
±1
±1
+20
+20
V
CC
0.8
±10
±10
−0.8
+20
+20
110
+100
0.075
|65|
Max
460
27
1.5
10
1.65
Units
mV
mV
V
mV
V
V
mA
V
V
V
V
mA
mA
mV
mV
V
µA
µA
V
V
µA
µA
V
Output Short Circuit Current V
OD
= 0V, DE = V
CC
, Driver outputs
(Note 10)
shorted together
Voltage Output High (Note
11)
V
ID
= +300 mV
Inputs Open
Inputs Terminated,
R
L
= 27Ω
I
OH
= −400 µA
V
OL
I
OD
V
TH
V
TL
V
CMR
I
IN
Voltage Output Low
Receiver Output Dynamic
Current (Note 10)
Input Threshold High
Input Threshold Low
Receiver Common Mode
Range
Input Current
I
OL
= 2.0 mA, V
ID
= −300 mV
V
ID
= 300mV, V
OUT
= V
CC
−1.0V
V
ID
= −300mV, V
OUT
= 1.0V
DE = 0V, V
CM
= 1.5V
−20
−20
2.0
GND
−20
−20
−1.5
3
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DS92LV090A
Symbol
I
CCD
Parameter
Power Supply Current
Drivers Enabled, Receivers
Disabled
Conditions
No Load, DE = RE = V
CC
,
DIN = V
CC
or GND
V
CC
Pin
Min
Typ
55
Max
80
Units
mA
I
CCR
Power Supply Current
DE = RE = 0V, V
ID
= ±300mV
Drivers Disabled, Receivers
Enabled
Power Supply Current,
Drivers and Receivers TRI-
STATE
®
Power Supply Current,
Drivers and Receivers
Enabled
Power Off Leakage Current
DE = 0V; RE = V
CC
,
DIN = V
CC
or GND
DE = V
CC
; RE = 0V,
DIN = V
CC
or GND,
R
L
= 27Ω
V
CC
= 0V or OPEN,
D
IN
, DE, RE = 0V or OPEN,
V
APPLIED
= 3.6V (Port Pins)
DO+/RI+,
DO−/RI−
DO+/RI+,
DO−/RI−
R
OUT
−20
73
80
mA
I
CCZ
35
80
mA
I
CC
170
210
mA
I
OFF
+20
µA
C
OUTPUT
Capacitance @ Bus Pins
c
OUTPUT
Capacitance @ R
OUT
5
7
pF
pF
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