EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 200°C/W,
θ
JC
= 40°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 150°C/W,
θ
JC
= 39°C/W
ORDER PART
NUMBER
LTC2850CDD
LTC2850IDD
TOP VIEW
DD PART
MARKING*
LCQC
LCQC
ORDER PART
NUMBER
LTC2850CMS
LTC2850IMS
MS8 PART
MARKING*
LTCQD
LTCQD
ORDER PART
NUMBER
LTC2850CS8
LTC2850IS8
TOP VIEW
S8 PART
MARKING*
2850
2850I
V
CC
RO
DI
GND
1
2
3
4
9
8
7
6
5
A
B
Z
Y
V
CC
RO
DI
GND
1
2
3
4
TOP VIEW
8
7
6
5
A
B
Z
Y
V
CC
RO
DI
GND
1
2
3
4
8
7
6
5
A
B
Z
Y
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W,
θ
JC
= 3°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 200°C/W,
θ
JC
= 40°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 150°C/W,
θ
JC
= 39°C/W
ORDER PART
NUMBER
LTC2851CDD
LTC2851IDD
DD PART
MARKING*
LCWD
LCWD
ORDER PART
NUMBER
LTC2851CMS
LTC2851IMS
MS8 PART
MARKING*
LTCWF
LTCWF
ORDER PART
NUMBER
LTC2851CS8
LTC2851IS8
S8 PART
MARKING*
2851
2851I
285012f
2
LTC2850/LTC2851/LTC2852
TOP VIEW
TOP VIEW
NC 1
RO
RE
DE
DI
GND
1
2
3
4
5
11
10 V
CC
9 A
8 B
7 Z
6 Y
TOP VIEW
RO
RE
DE
DI
GND
1
2
3
4
5
10
9
8
7
6
V
CC
A
B
Z
Y
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
14 V
CC
13 NC
12 A
11 B
10 Z
9
8
Y
NC
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W,
θ
JC
= 3°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 120°C/W,
θ
JC
= 45°C/W
S PACKAGE
14-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 88°C/W,
θ
JC
= 37°C/W
ORDER PART
NUMBER
LTC2852CDD
LTC2852IDD
DD PART
MARKING*
LCRY
LCRY
ORDER PART
NUMBER
LTC2852CMS
LTC2852IMS
MS PART
MARKING*
LTCRX
LTCRX
ORDER PART
NUMBER
LTC2852CS
LTC2852IS
S PART
MARKING*
LTC2852CS
LTC2852IS
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
PRODUCT SELECTION GUIDE
PART NUMBER
LTC2850
LTC2851
LTC2852
DUPLEX
Half
Full
Full
PACKAGE
SO-8, MSOP-8, DFN-8
SO-8, MSOP-8, DFN-8
SO-14, MSOP-10, DFN-10
285012f
3
LTC2850/LTC2851/LTC2852
ELECTRICAL CHARACTERISTICS
SYMBOL
Driver
|V
OD
|
Differential Driver Output Voltage
R = ∞, V
CC
= 3V (Figure 1)
R = 27Ω, V
CC
= 3V (Figure 1)
R = 50Ω, V
CC
= 3.13V (Figure 1)
●
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
V
CC
V
CC
V
CC
0.2
UNITS
V
V
V
V
1.5
2
Δ|V
OD
|
Difference in Magnitude of Driver Differential R = 27Ω or 50Ω (Figure 1)
Output Voltage for Complementary Output
States
Driver Common Mode Output Voltage
Difference in Magnitude of Driver Common
Mode Output Voltage for Complementary
Output States
Driver Three-State (High Impedance) Output
Current on Y and Z
Maximum Driver Short-Circuit Current
R = 27Ω or 50Ω (Figure 1)
R = 27Ω or 50Ω (Figure 1)
V
OC
Δ|V
OC
|
●
●
3
0.2
V
V
I
OZD
I
OSD
Receiver
I
IN
R
IN
V
TH
ΔV
TH
V
OH
V
OL
I
OZR
I
OSR
Logic
V
IH
V
IL
I
INL
Supplies
I
CCS
I
CCR
I
CCT
I
CCTR
DE = 0V, (Y or Z) = –7V, 12V (LTC2852)
–7V ≤ (Y or Z) ≤ 12V (Figure 2)
●
±10
±180
±250
300
125
–100
96
125
±0.2
25
2.4
0.4
±1
±85
2
0.8
0
0
370
450
450
±10
5
900
1000
1000
µA
mA
mA
µA
µA
kΩ
V
mV
V
V
µA
mA
V
V
µA
µA
µA
µA
µA
●
–250
Receiver Input Current (A,B)
Receiver Input Resistance
DE = 0V, V
CC
= 0V or 3.3V, V
IN
= 12V (Figure 3)
DE = 0V, V
CC
= 0V or 3.3V, V
IN
= –7V (Figure 3)
⎯ ⎯
RE = V
CC
or 0V, DE = 0V, V
IN
= –7V, –3V, 3V, 7V,
12V (Figure 3)
VB = 0V
I(RO) = –4mA, A-B = 200mV, V
CC
= 3V
I(RO) = 4mA, A-B = –200mV, V
CC
= 3V
⎯
RE = V
CC
, 0V ≤ RO ≤ V
CC
(LTC2850, LTC2852)
⎯
0V ≤ RO ≤ V
CC
V
CC
= 3.6V
V
CC
= 3V
●
●
●
●
Receiver Differential Input Threshold Voltage –7V ≤ VB ≤ 12V
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Receiver Three-State (High Impedance)
Output Current on RO
Receiver Short-Circuit Current
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Supply Current in Shutdown Mode
Supply Current in Receive Mode
Supply Current in Transmit Mode
Supply Current with Both Driver and
Receiver Enabled
DE = 0V,
⎯
R
⎯
E = V
CC
(LTC2850, LTC2852)
DE = 0V,
⎯
R
⎯
E = 0V (LTC2850, LTC2852)
No Load, DE = V
CC
,
⎯
R
⎯
E = V
CC
(LTC2850,
LTC2852)
⎯ ⎯
No Load, DE = V
CC
, RE = 0V
●
●
●
●
●
●
●
●
●
●
●
285012f
4
LTC2850/LTC2851/LTC2852
SWITCHING CHARACTERISTICS
SYMBOL
Driver
f
MAX
Δt
PD
t
SKEWD
t
RD
, t
FD
t
ZLD
, t
ZHD
,
t
LZD
, t
HZD
Maximum Data Rate
Driver Input to Output Difference
|t
PLHD
– t
PHLD
|
Driver Output Y to Output Z
Driver Rise or Fall Time
Driver Enable or Disable Time
(Note 3)
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
R
L
= 500Ω, C
L
= 50pF,
⎯
R
⎯
E = 0V (Figure 5)
(LTC2850, LTC2852)
⎯ ⎯
R
L
= 500Ω, C
L
= 50pF, RE = V
CC
(Figure 5)
(LTC2850, LTC2852)
R
L
= 500Ω, C
L
= 50pF, (DE =
↓, ⎯
R
⎯
E = V
CC
)
or (DE = 0V,
⎯
R
⎯
E =
↑)
(Figure 5) (LTC2850,
LTC2852)
C
L
= 15pF, V
CM
= 1.5V, |V
AB
| = 1.5V,
t
R
and t
F
< 4ns (Figure 6)
C
L
= 15pF (Figure 6)
C
L
= 15pF (Figure 6)
R
L
=1k, C
L
=15pF, DE = V
CC
(Figure 7)
(LTC2850, LTC2852)
R
L
= 1k, C
L
= 15pF, DE = 0V (Figure 7)
(LTC2850, LTC2852)
●
●
●
●
●
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
20
10
1
1
4
50
6
±6
12.5
70
8
100
TYP
MAX
UNITS
Mbps
ns
ns
ns
ns
ns
µs
ns
t
PLHD
, t
PHLD
Driver Input to Output
t
ZHSD
, t
ZLSD
Driver Enable from Shutdown
t
SHDN
Time to Shutdown
Receiver
t
PLHR
, t
PHLR
Receiver Input to Output
t
SKEWR
t
RR
, t
FR
t
ZLR
, t
ZHR
,
t
LZR
, t
HZR
Differential Receiver Skew
|t
PLHR
– t
PHLR
|
Receiver Output Rise or Fall Time
Receiver Enable/Disable
●
●
●
●
●
50
1
3
70
6
12.5
50
8
ns
ns
ns
ns
µs
t
ZHSR
, t
ZLSR
Receiver Enable from Shutdown
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 3:
Maximum data rate is guaranteed by other measured parameters
and is not tested directly.
Note 4:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
1. Introduction
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