Low-voltage differential signaling (LVDS) with output
voltages of
±
350 mV into 100-ohm load version (Std)
Single 3.3V supply
Accepts
±
350 mV differential inputs
Output drivers are high-impedance when disabled or
when V
DD
≤
1.5V
16-pin SOIC/TSSOP packages
Industrial version available
Description
The CYPRESS CY2LL842 are differential line drivers and
receivers that utilize LVDS to achieve signaling rates of 650
Mbs. The receiver outputs can be switched to either or both
drivers thru the multiplexer control signals S0/S1. This
provides flexibility in application for either a splitter or router
configuration with a single device.
The CYPRESS CY2LL842 is configured as a single
two-channel repeater/Mux.
The LVDS standard provides a minimum differential output
voltage of 247 mV into a 100-ohm load and receipt of as little
as 100-mV signals with up to 1V of DC offset between trans-
mitter and receiver.
A doubly terminated bus LVDS line enables multipoint config-
urations.
Designed for both point to point based-band multi-point data
transmission over controlled impedance lines.
Block Diagram
Pin Configuration
1B
VDD
1DE
1A
S0
1A
1B
2A
2B
1Y
1Z
2Y
2Z
1DE
S1
2A
2B
GND
GND
2DE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
VDD
1Y
1Z
2DE
2Z
2Y
GND
S0 S1
16 pin SOIC/TSSOP
Cypress Semiconductor Corporation
Document #: 38-07063 Rev. **
•
3901 North First Street
•
San Jose
•
CY2LL842
CA 95134 • 408-943-2600
Revised July 29, 2002
ComLink™ Series
CY2LL842
Pin Description
Pin Number
1,2
3
4
5
6,7
8,9
10,11
12
14,13
15,16
Pin Name
1B, 1A
S0
1DE
S1
2A, 2B
Differential Input Channel 1
Function Select 0
Data Enable Channel 1
Function Select 1
Differential Input Channel 2
Ground
Differential Output Channel 2
Data Enable Channel 2
Differential Output Channel 1
Supply Voltage
Output
[1]
S1
0
0
1
1
1Y/1Z
1A/1B
2A/2B
1A/1B
2A/2B
2Y/2Z
1A/1B
2A/2B
2A/2B
1A/1B
–0.5V to 4V
–0.5V to 6.0V
–0.5V to V
DD
+0.5V
Class 3, A: 2KV, B: 500V
–65°C to 150°C
Pin Description
G
ND
2Y, 2Z
2DE
IY, 1Z
V
DD
Input
Table 1. Mux Function Table
Function
Splitter A
Splitter B
Pass Thru Router
Cross Point Router
S0
0
1
0
1
Table 2. Absolute Maximum Rating Over Operating Free-air Temperature
[2]
Supply Voltage Range, V
DD
(1)
Voltage Range (DE,S0,S1)
Input Voltage Range, V
IN
(A or B)
ESD (All pins)
Storage Temperature Range
Table 3. Recommended Operating Conditions
Parameter
V
DD
V
IH
V
IL
V
ID
V
IC
T
A
Parameter
VITH+
VITH-
II
II
II (Off)
Description
Supply Voltage
High-level Input Voltage
(S0,S1,1DE,2DE)
Low-level Input Voltage
(S0,S1,1DE,2DE)
Magnitude of Differential Input Voltage
0.1
Common Mode Input Voltage
( see
Figure 6,Figure 7,
and
Figure 8)
V
ID
/2
Operating Free Air Temperature
–40
Description
Positive-going Differential Input Voltage Threshold
Negative-going Differential Input Voltage Threshold
Input Current ( A Inputs)
Input Current (B Inputs)
Power-off Current (A or B Inputs)
Test Conditilons
V
CM
= 1.2V
V
CM
= 1.2V
VI = 0V
VI = 2.4V
VI = 0.8V
VI = 2.4V
V
DD
= 0V
Min.
3
2
Typ.
3.3
Max.
3.6
0.8
0.6
2.4–(VID/2)
85
Typ.
Max.
100
–10
–10
10
10
10
Unit
V
°C
Unit
mV
mV
uA
uA
uA
uA
uA
Table 4. Receiver Electrical Characteristics Over Recommended Operating Conditions
Min.
–100
–0.5
0.5
0.1
Notes:
1. See
Figure 1.
2. Stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. This is intended to be a stress rating only
and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied.
Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Document #: 38-07063 Rev. **
Page 2 of 14
ComLink™ Series
CY2LL842
Table 5. Receiver Electrical Characteristics Over Recommended Operating Conditions
Parameter
V
OD
~V
OD
V
OC
(SS)
~V
OC
(SS)
V
OC
(PP)
I
CC
Description
Differential Output Voltage Swing
Change in differential Output Voltage Swing
between logic states
Steady State Common-mode output voltage
Change in Steady State Common-mode
output between logic states
Peak to Peak Common-mode output voltage
Supply Current
No load f = 100 MHz
RL = 100 ohm f = 100 MHz
Both Channels Disabled f = 100 MHz
I
H
I
IL
I
OS
I
OZ
C
in
High-level Input Current
Low-level Input Current
Short-circuit Current
High-impedance Output Current
Input Capacitance
Control Input Capacitance
S0,S1,DE
S0,S1,DE
V
IH
= 5V
V
IL
= 0.8V
V
OY
or V
0Z
= 0V
V
OD
= 0V
V
OD
= 60mV
V
O
= 0V or V
DD
1A, 1B, 2A, 2B
S0, S1, 1DE, 2DE
0.1
0.1
3
8
20
5
20
20
1
1
pF
pF
uA
See
Figure 10
Test Conditions
RL = 100 Ohm
See
Figure 9
Min. Typ. Max. Unit
247
–50
1.125
–50
3
340
454
50
1.375
50
150
25
25
20
mV
mV
V
mV
mV
mA
mA
mA
uA
uA
mA
Table 6. Differential Receiver to Driver Switching Characteristics Over Recommended Operating Conditions
[4]
Parameter
T
PLH
T
PHL
T
sk(p)
T
r
T
f
T
PHZ
T
PLZ
T
PZH
T
PZL
T
PHL_skR1_Dx
T
PLH_skR1_Dx
T
PPHL_skR2_Dx
T
PLH_skR2_Dx
D
J
(P-P)
Description
Differential Propagation delay, low to high
Differential Propagation delay, high to low
Pulse Skew ( T
PHL
–T
PLH
)
Transition Low to High
Transition High to Low
Propagation delay, high-level to high-impedance output
Propagation delay, low-level to high-impedance output
Propagation delay, high-impedance to high-level output
Propagation delay, high-impedance to low-level output
Channel to Channel skew-receiver 1 to Any mux related
drivers
Channel to Channel skew-receiver 1 to Any mux related
drivers
Channel to Channel skew-receiver 2 to Any mux related
drivers
Channel to Channel skew-receiver 2 to Any mux related
drivers
Deterministic Jitter (100 MHz 25C VID = 0.4 So,S1=00)
PRBS Differential
(see
Figure 12)
Test Conditions
CL = 10 pF
(see
Figure 11)
Min.
Typ.
[3]
4
4
0.2
800
800
4
4.3
3
2
95
95
95
95
95
1500
1500
10
10
10
10
Max.
6
6
Unit
nS
nS
nS
pS
pS
nS
nS
nS
nS
pS
pS
pS
pS
pS
Notes:
3. All typical values are measured at 25°C with a 3.3V supply.
4. These parameters are measured over supply voltage and temperature ranges recommended for the device.