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DG421DY+

P1-P3P4-P6P7-P9P10-P12
DG421/DG423/DG425
Improved Low-Power,
CMOS Analog Switches with Latches
________________________________________________________________
Maxim Integrated Products
1
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
S1
IN1
V-
GND
N.C.
N.C.
WR
D1
DG421
V
L
V+
IN2
S2
D2
RS
N.C.
N.C.
DIP
_________________Pin Configurations
SWITCHES SHOWN FOR
LOGIC "1" INPUT
D2
D1
CK
R
DQ
CK
R
DQ
TWO SPST SWITCHES
PER PACKAGE
WR
RS
IN
SWITCH
01
0
1
Off
On
LOGIC "O" ≤ 0.8V
LOGIC "1" ≥ 2.4V
DG421 TRUTH TABLE
S1
WR
IN1
IN2
RS
S2
DG421
__Functional Diagrams/Truth Tables
Call toll free 1-800-998-8800 for free samples or literature.
19-0137; Rev 1; 3/94
_______________General Description
Maxim’s redesigned DG421/DG423/DG425 monolithic
analog switches now feature guaranteed on-resistance
matching (3Ω max) between switches and on-resistance
flatness over the signal range (4Ω max). These low on-
resistance switches (20Ω typ) conduct equally well in both
directions. They guarantee a low charge injection of 15pC
maximum and an ESD tolerance of 2000V minimum per
Method 3015.7. Off leakage current over temperature has
also been reduced (less than 5nA at +85°C).
The DG421/DG423/DG425 are precision, dual CMOS
switches with latchable logic inputs that simplify inter-
facing with microprocessors (µPs). The single-pole/single-
throw DG421 and double-pole/single-throw DG425 are
normally open dual switches. The dual, single-
pole/double-throw DG423 has two normally open and
two normally closed switches. Fast switching times
(175ns for t
ON
and 145ns for t
OFF
) and low power
consumption (35µW max) make these parts ideal for
battery-powered applications requiring µP-compatible
switches. Operation is from a single +10V to +30V supply,
or bipolar
±
4.5V to ±20V supplies. Fabricated with the
same 44V silicon-gate process, these switches have
rail-to-rail signal handling capabilities.
_______________________Applications
Sample-and-Hold Circuits Modems
Fax Machines Test Equipment
Battery-Operated Systems PBX, PABX
Guidance and Control Systems Military Radios
Audio Signal Routing Communication Systems
______________________New Features
♦ Plug-In Upgrades for Industry-Standard
DG421/DG423/DG425
♦ Improved r
(DS)ON
Match Between Channels (3Ω max)
♦ Guaranteed r
FLAT(ON)
Over Signal Range (4Ω max)
♦ Improved Charge Injection (15pC max)
♦ Improved Off Leakage Current Over Temperature
(<5nA at +85°C)
♦ Withstands Electrostatic Discharge (2000V min)
per Method 3015.7
__________________Existing Features
♦ Low r
DS(ON)
(35Ω max)
♦ Single-Supply Operation +10V to +30V
Bipolar-Supply Operation ±4.5V to ±20V
♦ Low Power Consumption (35µW max)
♦ Rail-to-Rail Signal Handling Capability
♦ TTL/CMOS-Logic Compatible
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
**Contact factory for availability and processing to MIL-STD-883B.
Functional Diagrams/Truth Tables continued at end of data sheet.
N.C. = No Internal Connection
Pin Configurations continued at end of data sheet.
16 CERDIP**-55°C to +125°CDG421AK
16 SO-40°C to +85°CDG421DY
Dice*0°C to +70°CDG421C/D
0°C to +70°C
16 CERDIP-40°C to +85°CDG421DK
16 Plastic DIP-40°C to +85°CDG421DJ
16 SO0°C to +70°CDG421CY
16 Plastic DIP
DG421CJ
PIN-PACKAGETEMP. RANGE PART
DG421/DG423/DG425
Improved Low-Power,
CMOS Analog Switches with Latches
2 _______________________________________________________________________________________
Voltage Referenced to V-
V+............................................................44V
GND .........................................................25V
V
L
..................................(GND - 0.3V) to (V+ + 0.3V)
Digital Inputs, V
S
, V
D
(Note 1)..............(V- - 2V) to (V+ + 2V)
Current (any terminal, except S or D).................................30mA
Continuous Current, S or D.................................................20mA
Peak Current, S or D (pulsed at 1ms, 10% duty cycle max)...100mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C) ...842mW
20-Pin PLCC (derate 10.00mW/°C above +70°C) ..... 800mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C) ...800mW
Operating Temperature Ranges
DG42_C_ ..........................................0°C to +70°C
DG42_D_ .......................................-40°C to +85°C
DG42_A_ . .....................................-55°C to +125°C
Storage Temperature Ranges
DG42_C_/DG42_D_ ...........................-65°C to +125°C
DG42_A_ ..................................... -65°C to +150°C
Lead Temperature (soldering, 10sec)....................+300°C
ELECTRICAL CHARACTERISTICS
(V+ = 15V, V- = -15V, V
L
= +5V, GND = 0V, V
INH
= +2.4V, V
INL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings
"
may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ABSOLUTE MAXIMUM RATINGS
Note 1: Signals on S, D, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings.
T
A
= +25°C
T
A
= T
MIN to TMAX
V+ = 13.5V,
V- = -13.5V,
I
S
= -10mA,
V
D
= ±10V
r
DS(ON)
Drain-Source
On-Resistance
CONDITIONSSYMBOLPARAMETER
20 45
DG42_C, DG42_D
MIN TYP MAX
(Note 2)
Ω
UNITS
45 45
20 35
DG42_A
MIN TYP MAX
(Note 2)
T
A
= +25°C
T
A
= T
MIN to TMAX
V+ = 16.5V,
V- = -16.5V,
I
S
= -10mA,
V
D
= ±10V
∆r
DS(ON)
On-Resistance Match
Between Channels
(Note 4)
Ω
4 4
3 3
T
A
= +25°C
T
A
= T
MIN to TMAX
V+ = 15V,
V- = -15V,
I
S
= -10mA,
V
D
= ±5V
r
FLAT(ON)
On-Resistance
Flatness (Note 4)
Ω
5 5
4 4
(Note 3)V
ANALOG
Analog Signal Range V-15 15 -15 15
T
A
= +25°C
T
A
= T
MIN to TMAX
V+ = 16.5V,
V- = -16.5V,
V
D
= ±15.5V,
V
S
= 15.5V
m
I
S(OFF)
Source-Off
Leakage Current
(Note 5)
nA
-5 5 -10 10
-0.50 -0.01 0.50 -0.25 -0.01 0.25
T
A
= +25°C
T
A
= T
MIN to TMAX
V+ = 16.5V,
V- = -16.5V,
V
D
= ±15.5V,
V
S
= 15.5V
m
I
D(OFF)
Drain-Off
Leakage Current
(Note 5)
nA
-5 5 -10 10
-0.50 -0.01 0.50 -0.25 -0.01 0.25
T
A
= +25°C
T
A
= T
MIN to TMAX
V+ = 16.5V,
V- = -16.5V,
V
D
= ±15.5V,
V
S
= ±15.5V
I
D(ON)
Drain-On
Leakage Current
(Note 5)
nA
-10 10 -20 20
-1.0 -0.04 1.0 -0.40 -0.04 0.40
SWITCH
DG421/DG423/DG425
Improved Low-Power,
CMOS Analog Switches with Latches
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V- = -15V, V
L
= +5V, GND = 0V, V
INH
= +2.4V, V
INL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
T
A
= +25°C
T
A
= T
MIN to TMAX
All channels on or off,
V+ = 16.5V, V- = -16.5V,
V
IN
= 0V or 5V
I+Positive Supply Current
CONDITIONSSYMBOLPARAMETER
µA
UNITS
-5.0 5.0
-1.0 0.01 1.0
MIN TYP MAX
(Note 2)
IN = 2.4V, all others = 0.8VI
INH
Input Current with Input Voltage High µA-0.50 0.005 0.50
IN = 0.8V, all others = 2.4VI
INL
Input Current with Input Voltage Low µA-0.50 0.005 0.50
(Note 3)V+, V-Power Supply Range V±4.5 ±20
T
A
= +25°C
T
A
= T
MIN to TMAX
All channels on or off,
V+ = 16.5V, V- = -16.5V,
V
IN
= 0V or 5V
I-Negative Supply Current µA
-5.0 5.0
-1.0 -0.01 1.0
T
A
= +25°C
T
A
= T
MIN to TMAX
All channels on or off,
V+ = 16.5V, V- = -16.5V,
V
IN
= 0V or 5V
I
GND
Ground Current µA
-5.0 5.0
-1.0 -0.01 1.0
T
A
= +25°C
T
A
= T
MIN to TMAX
Figure 2t
ON
Turn-On Time ns
300
150 250
200 nsFigure 2t
OFF
Turn-Off Time
T
A
= +25°C
T
A
= -55°C to +125°C
V
S
= ±10V,
R
L
= 300Ω,
C
L
= 35pF,
Figure 3
t
WW
Latch Timing ns
200
200
T
A
= +25°C
T
A
= -55°C to +125°C
t
DW
100
100
T
A
= +25°C
T
A
= -55°C to +125°C
t
WD
100
60
T
A
= +25°C 525
T
A
= +25°C
T
A
= T
MIN to TMAX
All channels on or off,
V+ = 16.5V, V- = -16.5V,
V
IN
= 0V or 5V
I
L
Logic Supply Current µA
-5.0 5.0
-1.0 -0.01 1.0
Break-Before-Make Interval (Note 3) t
D
DG423, Figure 4 ns
T
A
= +25°C 10 15Charge Injection (Note 3) Q
C
L
= 10nF, V
G
= 0V,
R
G
= 0Ω, Figure 5
pC
T
A
= +25°C 72
Off-Isolation Rejection Ratio
(Note 6)
OIRR
R
L
= 100Ω, C
L
= 5pF,
f = 1MHz, Figure 6
dB
T
A
= +25°C 12Drain-Off Capacitance C
D(OFF)
f = 1MHz, Figure 8 pF
T
A
= +25°C 90Crosstalk (Note 7)
R
L
= 50Ω, C
L
= 5pF,
f = 1MHz, Figure 7
dB
T
A
= +25°C 12Source-Off Capacitance C
S(OFF)
f = 1MHz, Figure 8 pF
Note 2: Typical values are for design aid only, are not guaranteed, and are not subject to production testing. The algebraic convention,
where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet.
Note 3: Guaranteed by design.
Note 4: On-resistance match between channels and flatness are guaranteed only with bipolar-supply operation. Flatness is defined as the dif-
ference between the maximum and minimum value of on-resistance as measured at the extremes of the specified analog signal range.
Note 5: Leakage parameters I
S(OFF)
, I
D(OFF)
, and I
D(ON)
are 100% tested at the maximum rated hot temperature and guaranteed by
correlation at +25°C.
Note 6: Off-Isolation Rejection Ratio = 20log (V
D
/V
S
), V
D
= output, V
S
= input to off switch.
Note 7: Between any two switches.
T
A
= +25°C 39Drain-On Capacitance C
D(ON)
f = 1MHz, Figure 9 pF
T
A
= +25°C 39Source-On Capacitance C
S(ON)
f = 1MHz, Figure 9 pF
INPUT
SUPPLY
DYNAMIC
P1-P3P4-P6P7-P9P10-P12

DG421DY+

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Buy DG421DY+
Manufacturer:
Maxim Integrated
Description:
Analog Switch ICs Improved Low-Power, CMOS Analog Switches with Latches
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