IN1IN2
D1D2
S1S2
V– V+
GND NC
S4S3
D4D3
IN4IN3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Top View
DG308A
DG308A/DG309
Vishay Siliconix
Document Number: 70046
S-52882—Rev. E, 28-Apr-97 www.vishay.com FaxBack 408-970-5600
4-1
Quad Monolithic SPST CMOS Analog Switches
15-V Analog Input Range
Low On-Resistance: 60
Fast Switching: 130 ns
Low Power Dissipation: 30 nW
CMOS Logic Compatible
Full Rail-to-Rail Analog Signal Range
Low Signal Error
Wide Dynamic Range
Single or Dual Supply Capability
Static Protected Logic Inputs
Space Savings (TSSOP)
Portable and Battery Powered
Instrumentation
Communication Systems
Computer Peripherals
High-Speed Multiplexing
Featuring low on-resistance (60 ) and fast switching
(130 ns), the DG308A is supplied in the “normally open”
configuration while DG309 is supplied “normally closed.” Input
thresholds are high voltage CMOS compatible.
Designed with the Vishay Siliconix PLUS-40 CMOS process
to combine low power dissipation with a high breakdown
voltage rating of 44 V, each switch conducts equally well in
both directions when on, and blocks up to the supply voltage
when off. An epitaxial layer prevents latch up.
The DG308B/309B upgrades are recommended for new
designs.
Four SPST Switches per Package
Logic DG308A DG309
0 OFF ON
1 ON OFF
Logic “0” 3.5 V
Logic “1” 11 V
DG308A/DG309
Vishay Siliconix
www.vishay.com S FaxBack 408-970-5600
4-2 Document Number: 70046
S-52882—Rev. E, 28-Apr-97
ORDERING INFORMATION
Temp Range Package Part Number
0 to 70
_
C
16
-
Pin Plastic DIP
DG308ACJ
0
to
70_C
16
-
Pin
Plastic
DIP
DG309CJ
40 85 C
16
-
Pin Narrow SOIC
DG308ADY
–
40 to 85
_
C
16
-
Pin
Narrow
SOIC
DG309DY
–
40
to
85_C
16
-
Pin TSSOP
DG308ADQ
16
-
Pin
TSSOP
DG309DQ
–
55 to 125
_
C
16
-
Pin CerDIP
DG308AAK/883
–
55
to
125_C
16
-
Pin
CerDIP
DG309AK/883
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to V–
V+ 44 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GND 25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Inputsa, VS, VD(V–) –2 V to (V+) +2V or. . . . . . . . . . . . . . . . . . . . . . . . .
20 mA, whichever occurs first
Current, Any Terminal Except S or D 30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous Current, S or D 20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Pulsed at 1 ms, 10% duty cycle max) 70 mA. . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature (AK Suffix) –65 to 150_C. . . . . . . . . . . . . . . . . .
(CJ, DY, and DQ Suffix) –65 to 125_C. . . . . . .
Power Dissipationb
16-Pin Plastic DIPc470 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-Pin Narrow SOIC and TSSOPe600 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-Pin Cerdipd900 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes:
a. Signals on SX, DX, or INX exceeding V+ or V– will be clamped by internal
diodes. Limit forward diode current to maximum current ratings.
b. All leads welded or soldered to PC Board.
c. Derate 12 mW/_C above 75_C
d. Derate 6.5 mW/_C above 25_C
e. Derate 7.6 mW/_C above 75_C
SCHEMATIC DIAGRAM (TYPICAL CHANNEL)
FIGURE 1.
Level
Shift/
Drive
VIN
S
V+
GND
V–
D
V–
V+
DG308A/DG309
Vishay Siliconix
Document Number: 70046
S-52882—Rev. E, 28-Apr-97 www.vishay.com S FaxBack 408-970-5600
4-3
Test Conditions
Unless Otherwise Specified A Suffix
–55 to 125_CC, D Suffix
Parameter Symbol V+ = 15 V, V– = –15 V
VIN = 3.5 V or 11 VfTempbTypcMindMaxdMindMaxdUnit
Analog Switch
Analog Signal RangeeVANALOG Full –15 15 –15 15 V
Drain-Source
On-Resistance rDS(on) VD = 10 V, IS = 1 mA Room
Full 60 100
150 100
125 W
Source Off
Leakage Current IS(off) VS = 14 V, VD = 14 V Room
Full 0.1 –1
–100 1
100 –5
–100 5
100
A
Drain Off
Leakage Current ID(off) VD = 14 V, VS = 14 V Room
Full 0.1 –1
–100 1
100 –5
–100 5
100 nA
Drain On
Leakage Current ID(on) VD = VS = 14 V Room
Full 0.1 –1
–100 1
100 –5
–200 5
200
Digital Control
Input Current with
Input V oltage High IINH VIN = 15 V Full 0.001 1 1
mA
Input Current with
Input V oltage Low IINL VIN = 0 V Full –0.001 –1 –1
m
A
Input Capacitance CIN Room 8 pF
Dynamic Characteristics
Turn-On Time tON
See Figure 2
Room 130 200 200
ns
T urn-Off Time tOFF
See
Figure
2
Room 90 150 150
ns
Charge Injection Q CL = 0.01 mF, Rgen = 0 W, Vgen = 0 V Room –10 pC
Source-Off
Capacitance CS(off)
f 140 kH V V 0 V
Room 11
F
Drain-Off
Capacitance CD(off) f = 140 kHz, VS, VD = 0 V Room 8 pF
Channel-On
Capacitance CD(on) Room 27
Off-IsolationfOIRR RL = 75 , VS = 2 Vp-p, f = 500 kHz Room 78 dB
Power Supplies
Positive
Supply Current I+ All Channels On or Off Room
Full 0.001 10
100 10
100
mA
Negative
Supply Current I–
All
Channels
On
or
Off
VIN = 0 V or 15 V Room
Full –0.001 –10
–100 –100 mA
Notes:
a. Refer to PROCESS OPTION FLOWCHART.
b. Room = 25_C, Full = as determined by the operating temperature suffix.
c. T ypical values are for DESIGN AID ONL Y, not guaranteed nor subject to production testing.
d. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
e. Guaranteed by design, not subject to production test.
f. VIN = input voltage to perform proper function.
DG308A/DG309
Vishay Siliconix
www.vishay.com S FaxBack 408-970-5600
4-4 Document Number: 70046
S-52882—Rev. E, 28-Apr-97
_
rDS(on)
– Drain-Source On-Resistance ( )W
–12 –6 0 6 12 1593–3–9–15
150
–10 0 10 20
120
90
60
30
0
TA = 25_C
rDS(on) vs. VD and Power Supply
155–5–15
250
0 5 10 15 20
200
150
100
50
0
rDS(on) vs. VD and Power Supply Voltage
TA = 25_C
V– = 0 V
10
0
–10
–20
–30
Leakage Currents vs. Analog Voltage
(pA)I , I
SD
T
A
= 25_C10
0
8
6
4
2
Input Switching Threshold
vs. V+ and V– Supply Voltages
V+, V– Positive & Negative Supplies (V)
(V)
T
V
TA = 25_C
0510 15 20
rDS(on)
– Drain-Source On-Resistance ( )W
5 V
7.5 V
10 V
15 V
20 V
+10 V
+15 V
+20 V
V+ = +7.5 V
VD – Drain Voltage (V) VD – Drain Voltage (V)
VD or VS – Drain or Source Voltage (V)
IS(off)
ID(off) ID(on)
1000
800
600
400
200 I+
Supply Currents vs. Switching Frequency
(All Inputs Active)
1 k 10 k 100 k 1 M
15 V Supplies
TA = 25_C
I–
100
8
0 5 10 15
7
6
5
4
3
2
1
0
Input Switching Threshold vs. Positive
Supply Voltage
V+ – Positive Supply Voltage (V)
V– = 0 V
TA = 25_C
I+, I– ( mA)
(V)
T
V
f – Frequency (Hz)
DG308A/DG309
Vishay Siliconix
Document Number: 70046
S-52882—Rev. E, 28-Apr-97 www.vishay.com FaxBack 408-970-5600
4-5
FIGURE 2. Switching T ime
50%
0 V
12 V
tOFF
tON
VO
tr <20 ns
tf <20 ns
Logic
Input
Switch
Output
90%
CL
35 pF
RL
1 k
VO = VSRL + rDS(on)
RL
VS = +3 V VO
V–
V+
IN
SD
12 V
–15 V
GND
+15 V
Single Supply Operation
The DG308A and DG309 will switch positive analog signals
while using a single positive supply . This will allow use in many
applications where only one supply is available. The trade-offs
or performance given up while using single supplies are:
1) increased rDS(on) and 2) slower switching speed. As stated
in the absolute maximum ratings section of the data sheet, the
analog voltage should not go above or below the supply
voltages which in single supply operation are V+ and 0 V.
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
