LTC1380/LTC1393
Single-Ended 8-Channel/
Differential 4-Channel Analog
Multiplexer with SMBus Interface
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTION
The LTC
®
1380/LTC1393 are CMOS analog multiplexers with
SMBus
®
compatible digital interfaces. The LTC1380 is a
single-ended 8-channel multiplexer, while the LTC1393 is a
differential 4-channel multiplexer. The SMBus digital inter-
face requires only two wires (SCL and SDA). Both the
LTC1380 and the LTC1393 have four hard-wired SMBus
addresses, selectable with two external address pins. This
allows four devices, each with a unique SMBus address, to
coexist on one system and for four devices to be synchro-
nized with one stop bit.
The supply current is typically 10µA. Both digital interface
pins are SMBus compatible over the full operating supply
voltage range. The LTC1380 analog switches feature a
typical R
ON
of 35Ω (±5V supplies), typical switch leakage of
20pA and guaranteed break-before-make operation. Charge
injection is
±1pC
typical.
The LTC1380/LTC1393 are available in 16-lead SO and GN
packages. Operation is fully specified over the commercial
and industrial temperature ranges.
, LTC and LT are registered trademarks of Linear Technology Corporation.
SMBus is a registered trademark of Intel Corporation.
Micropower Operation: Supply Current = 20µA Max
2-Wire SMBus Interface
Single 2.7V to
±5V
Supply Operation
Expandable to 32 Single or 16 Differential Channels
Guaranteed Break-Before-Make
Low R
ON
: 35Ω Single Ended/70Ω Differential
Low Charge Injection: 20pC Max
Low Leakage:
±5nA
Max
Available in 16-Lead SO and GN Packages
APPLICATIONS
s
s
s
s
s
Data Acquisition Systems
Process Control
Laptop Computers
Signal Multiplexing/Demultiplexing
Analog-to-Digital Conversion Systems
TYPICAL APPLICATION
LTC1380 Single-Ended 8-Channel Multiplexer
5V
On Resistance vs V
S
250
225
T
A
= 25°C
I
D
= 1mA
V
CC
= 2.7V
V
EE
= 0V
SMBus
HOST
1
2
3
4
8 ANALOG
INPUTS
5
6
7
8
S0
S1
S2
S3
S4
S5
S6
S7
ON RESISTANCE (Ω)
V
CC
SCL
SDA
LTC1380
A0
A1
GND
V
EE
D
O
16
15
14
13
12
11
10
9
0.1µF
15k
15k
200
175
150
125
100
75
50
V
CC
= 5V
V
EE
= – 5V
V
CC
= 5V
V
EE
= 0V
SCL
SDA
0.1µF
– 5V
ANALOG OUTPUT
1380/93 TA01
25
0
–5 –4 –3 –2 –1
0 1
V
S
(V)
2
3
4
5
U
U
U
1167 G15
1
LTC1380/LTC1393
ABSOLUTE
MAXIMUM
RATINGS
(Note 1)
Total Supply Voltage
LTC1380 (V
CC
to V
EE
) ......................................... 15V
LTC1393 (V
CC
to GND) ....................................... 15V
Analog Input Voltage
LTC1380 ............................. V
EE
– 0.3V to V
CC
+ 0.3V
LTC1393 ................................... – 0.3V to V
CC
+ 0.3V
Digital Inputs .............................................– 0.3V to 15V
LTC1380 (V
CC
TO V
EE
) .... (V
EE
– 0.3V) to (V
EE
+ 15V)
LTC1393 (V
CC
to GND) .......................... – 0.3V to 15V
PACKAGE/ORDER INFORMATION
TOP VIEW
S0 1
S1 2
S2 3
S3 4
S4 5
S5 6
S6 7
S7 8
16 V
CC
15 SCL
14 SDA
13 A0
12 A1
11 GND
10 V
EE
9
D
O
ORDER PART
NUMBER
LTC1380CGN
LTC1380CS
LTC1380IGN
LTC1380IS
GN PACKAGE
S PACKAGE
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 130°C/ W (GN)
T
JMAX
= 125°C,
θ
JA
= 100°C/ W (S)
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
ANALOG
R
ON
PARAMETER
Analog Signal Range
On Resistance
CONDITIONS
LTC1380
LTC1393
(Notes 2, 4)
MIN
q
q
q
LT1380: V
CC
= 5V, V
EE
= – 5V,
V
EE
≤
(V
S
, V
D
)
≤
V
CC
, I
D
=
±1mA
LT1393: V
CC
= 5V,
0V
≤
(V
S
, V
D
)
≤
V
CC
, I
D
=
±1mA
LT1380/LTC1393: V
CC
= 2.7V, V
EE
= 0V,
0V
≤
(V
S
, V
D
)
≤
V
CC
, I
D
=
±1mA
∆R
ON
vs V
S
R
ON
vs Temperature
I
LEAK
Off-Channel or On-Channel
Switch Leakage
V
EE
≤
(V
S
, V
D
)
≤
V
CC
, V
CC
= 5V
V
CC
= 5V
LTC1380: (V
EE
+ 0.5V)
≤
(V
S
, V
D
)
≤
(V
CC
– 0.5V)
LTC1393: 0.5V
≤
(V
S
, V
D
)
≤
(V
CC
– 0.5V)
q
2
U
U
W
W W
U
W
Maximum Switch-On Current .............................. 65mA
Power Dissipation ............................................. 500mW
Operating Ambient Temperature Range
LTC1380C/LTC1393C ....................... 0°C
≤
T
A
≤
70°C
LTC1380I/LTC1393I .................... – 40°C
≤
T
A
≤
85°C
Junction Temperature ........................................... 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
TOP VIEW
S0
+
1
S0
–
2
S1
+
S2
+
S3
+
3
S1
–
4
5
S2
–
6
7
S3
–
8
16 V
CC
15 SCL
14 SDA
13 A0
12 A1
11 GND
10 D
O–
9
D
O+
ORDER PART
NUMBER
LTC1393CGN
LTC1393CS
LTC1393IGN
LTC1393IS
GN PACKAGE
S PACKAGE
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 130°C/ W (GN)
T
JMAX
= 125°C,
θ
JA
= 100°C/ W (S)
TYP
MAX
V
CC
V
CC
UNITS
V
V
Ω
Ω
Ω
Ω
Ω
Ω
%
%/°C
V
EE
0
35
70
70
120
140
200
400
600
q
210
q
20
0.5
±0.05
±5
±50
nA
nA
LTC1380/LTC1393
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IH
V
IL
V
OL
V
AH
V
AL
I
IN
I
CC
I
EE
C
S
C
D
t
ON
PARAMETER
SCL, SDA Input High Voltage
SCL, SDA Input Low Voltage
SDA Output Low Voltage
Address Input High Voltage
Address Input Low Voltage
SCL, SDA, Address Input Current
Positive Supply Current
Negative Supply Current
Input Off Capacitance
Output Off Capacitance
Switch Turn-On Time from
Stop Condition
Switch Turn-Off Time from
Stop Condition
Break-Before-Make Interval
Off-Channel Isolation
Charge Injection
SMBus Operating Frequency
Bus Free Time Between Stop/Start
Hold Time After (Repeated) Start
Repeated Start Setup Time
Stop Condition Setup Time
Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
SCL/SDA Fall Time
SCL/SDA Rise Time
I
SDA
= 3mA
V
CC
= 5V
V
CC
= 5V
0V
≤
V
IN
≤
V
CC
CONDITIONS
(Notes 2, 4)
MIN
q
q
q
q
q
TYP
MAX
0.6
0.4
UNITS
V
V
V
V
V
µA
µA
µA
pF
pF
pF
1.4
2
0.8
±1
10
– 0.1
3
26
18
20
–5
V
CC
= 5V, All Digital Inputs at 5V
LTC1380: V
CC
= 5V, V
EE
= – 5V, All Digital Inputs at 5V
(Note 3)
(Note 3) LTC1380
LTC1393
Figure 1 LTC1380: V
CC
= 5V, V
EE
= – 5V
LTC1393: V
CC
= 5V
LTC1380/LTC1393: V
CC
= 2.7V, V
EE
= 0V
Figure 1 LTC1380: V
CC
= 5V, V
EE
= – 5V
LTC1393: V
CC
= 5V
LTC1380/LTC1393: V
CC
= 2.7V, V
EE
= 0V
t
ON
– t
OFF
Figure 2, V
S
= 200mV
P-P
, R
L
= 1k, f = 100kHz (Note 3)
Figure 3, C
L
= 1000pF (Note 3)
q
q
q
q
q
q
q
q
q
850
850
1130
640
650
670
75
210
– 65
±1
1500
1500
2000
1200
1200
1200
ns
ns
ns
ns
ns
ns
ns
dB
t
OFF
t
OPEN
OIRR
Q
INJ
f
SMB
t
BUF
t
HD:STA
t
SU:STA
t
SU:STO
t
HD:DAT
t
SU:DAT
t
LOW
t
HIGH
t
f
t
r
q
±20
100
pC
kHz
µs
µs
µs
µs
ns
ns
µs
µs
SMBus Timing (Note 6)
q
q
q
q
q
q
q
q
q
4.7
4.0
4.7
4.0
300
250
4.7
4.0
300
1000
Time Interval Between 0.9V
DD
and (V
ILMAX
– 0.15)
Time Interval Between (V
ILMAX
– 0.15)
and (V
IHMIN
+ 0.15)
q
q
ns
ns
The
q
denotes specifications which apply over the full operating
temperature range.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
All current into device pins is positive; all current out of device
pins is negative. All voltages are referenced to ground unless otherwise
specified. All typicals are given for T
A
= 25°C, V
CC
= 5V (for both LTC1380
and LTC1393) and V
EE
= – 5V (LTC1380).
Note 3:
These typical parameters are based on bench measurements and
are not production tested.
Note 4:
Both SCL and SDA assume an external 15k pull-up resistor to a
typical SMBus host power supply V
DD
of 5V.
Note 5:
Typical curves with V
EE
= – 5V apply to the LTC1380. Curves with
V
EE
= 0V apply to both the LTC1380 and the LTC1393.
Note 6:
These parameters are guaranteed by design and are not tested in
production.
3
LTC1380/LTC1393
TYPICAL PERFOR A CE CHARACTERISTICS
On Resistance vs Temperature
250
225
200
I
D
= 1mA
0.0020
0.0018
0.0016
I
S
LEAKAGE (nA)
ON RESISTANCE (Ω)
I
D
LEAKAGE (nA)
175
150
125
100
75
50
25
0
– 50 –25
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
V
CC
= 2.7V
V
EE
= 0V
V
S
= 1.35V
V
CC
= 5V
V
EE
= 0V
V
S
= 2.5V
50
25
0
75
TEMPERATURE (°C)
On-Channel Input Leakage vs V
S
0.010
0.008
0.006
T
A
= 25°C
0.010
0.008
0.006
I
D
LEAKAGE (nA)
I
S
LEAKAGE (nA)
0.002
0
– 0.002
– 0.004
– 0.006
– 0.008
V
CC
= 5V
V
EE
= – 5V
I
S
LEAKAGE (nA)
0.004
V
CC
= 2.7V
V
EE
= 0V
V
CC
= 5V
V
EE
= 0V
– 0.010
– 4.5 – 3.5 – 2.5 –1.5 – 0.5 0.5 1.5 2.5 3.5 4.5
V
S
(V)
1380/93 G04
Off-Channel Output Leakage
vs Temperature
1000
100
10
1
0.1
0.01
0.001
0.0001
– 50 – 25
V
CC
= 5V
V
EE
= – 5V
V
D
= 0V
1000
100
10
1
0.1
0.01
0.001
I
D
LEAKAGE (nA)
V
CC
= 5V
V
EE
= 0V
V
D
= 2.5V
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
V
CC
= 2.7V
V
EE
= 0V
V
S
= 1.35V
I
D
LEAKAGE (nA)
I
S
LEAKAGE (nA)
V
CC
= 2.7V
V
EE
= 0V
V
D
= 1.35V
50
25
75
0
TEMPERATURE (°C)
4
U W
100
(Note 5)
Off-Channel Input Leakage vs V
S
0.010
T
A
= 25°C
V
CC
= 5V
V
EE
= – 5V
V
CC
= 2.7V
V
EE
= 0V
V
CC
= 5V
V
EE
= 0V
0.008
0.006
0.004
0.002
0
– 0.002
– 0.004
– 0.006
– 0.008
Off-Channel Output Leakage vs V
D
T
A
= 25°C
0.0014
0.0012
0.0010
0.0008
0.0006
0.0004
0.0002
V
CC
= 5V
V
EE
= – 5V
V
CC
= 5V
V
EE
= 0V
V
CC
= 2.7V
V
EE
= 0V
125
0
– 4.5 – 3.5 – 2.5 –1.5 – 0.5 0.5 1.5 2.5 3.5 4.5
V
S
(V)
1380/93 G02
– 0.010
– 4.5 – 3.5 – 2.5 –1.5 – 0.5 0.5 1.5 2.5 3.5 4.5
V
D
(V)
1380/93 G03
1380/93 G01
On-Channel Output Leakage vs V
D
10
T
A
= 25°C
1
V
CC
= 5V
V
EE
= – 5V
Off-Channel Input Leakage
vs Temperature
V
CC
= 2.7V
V
EE
= 0V
V
S
= 1.35V
V
CC
= 5V
V
EE
= 0V
V
S
= 2.5V
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
0.004
0.002
0
– 0.002
– 0.004
– 0.006
– 0.008
0.1
V
CC
= 2.7V
V
EE
= 0V
0.01
0.001
V
CC
= 5V
V
EE
= 0V
0.0001
–50 –25
50
0
75
25
TEMPERATURE (°C)
– 0.010
– 4.5 – 3.5 – 2.5 –1.5 – 0.5 0.5 1.5 2.5 3.5 4.5
V
D
(V)
1380/93 G05
100
125
1380/93 G06
On-Channel Input Leakage
vs Temperature
1000
V
CC
= 5V
V
EE
= 0V
V
S
= 2.5V
100
10
1
0.1
0.01
0.001
On-Channel Output Leakage
vs Temperature
V
CC
= 2.7V
V
EE
= 0V
V
D
= 1.35V
V
CC
= 5V
V
EE
= 0V
V
D
= 2.5V
V
CC
= 5V
V
EE
= – 5V
V
D
= 0V
100
125
0.0001
– 50 – 25
50
25
75
0
TEMPERATURE (°C)
100
125
0.0001
– 50 – 25
50
25
75
0
TEMPERATURE (°C)
100
125
1380/93 G07
1380/93 G08
1380/93 G09
LTC1380/LTC1393
TYPICAL PERFOR A CE CHARACTERISTICS
Off Time vs Temperature
800
700
600
V
CC
= 2.7V
V
EE
= 0V
V
S
= 1.35V
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
V
CC
= 5V
V
EE
= 0V
V
S
= 2.5V
1600
1400
1200
ON TIME (ns)
OFF TIME (ns)
400
300
200
100
0
– 50 – 25
0
50
75
25
TEMPERATURE (°C)
100
125
800
600
400
200
0
– 50 – 25
0
V
CC
= 5V
V
EE
= 0V
V
S
= 2.5V
Q
INJ
(pC)
500
Q
INJ
vs Temperature (Figure 3)
2.0
1.8
1.6
1.4
Q
INJ
(pC)
OIRR (dB)
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
V
CC
= 5V
V
EE
= 0V
V
S
= 2.5V
V
CC
= 2.7V
V
EE
= 0V
V
S
= 1.35V
I
CC
vs Temperature
10
9
8
7
I
CC
(µA)
5
4
3
2
1
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
I
EE
(nA)
6
V
CC
= 2.7V
V
EE
= 0V
U W
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
(Note 5)
Q
INJ
vs V
C
(Figure 3)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
V
CC
= 2.7V
V
EE
= 0V
– 5 – 4 – 3 – 2 –1
0 1
V
C
(V)
2
3
4
5
V
CC
= 5V
V
EE
= 0V
V
CC
= 5V
V
EE
= – 5V
T
A
= 25°C
On Time vs Temperature
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
V
CC
= 2.7V
V
EE
= 0V
V
S
= 1.35V
1000
50
75
25
TEMPERATURE (°C)
100
125
0
1380/93 G10
1380/93 G11
1380/93 G12
Off-Channel Isolation vs Input
Common Mode Voltage (Figure 2)
– 75
– 74
– 73
– 72
– 71
– 70
– 69
– 68
– 67
– 66
– 65
T
A
= 25°C
V
S
= 200mV
P-P
, 100kHz
R
L
= 1k
– 5 – 4 – 3 –2 –1
0 1
V
C
(V)
2
3
4
5
V
CC
= 5V
V
EE
= – 5V
V
CC
= 5V
V
EE
= 0V
V
CC
= 2.7V
V
EE
= 0V
50
25
0
75
TEMPERATURE (°C)
100
125
1380/93 G13
1380/93 G14
I
EE
vs Temperature
0
V
CC
= 5V
V
EE
= – 5V
–10
–20
– 30
V
CC
= 5V
V
EE
= – 5V
V
S
= 0V
V
CC
= 5V
V
EE
= 0V
– 40
– 50
– 60
–70
– 80
– 90
–100
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1380/93 G15
1380/93 G16
5
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