MAX394CWP Maxim Integrated Products, MAX394CWP Datasheet - Page 9

• Manufacturer Part Number: MAX394CWP
• Description: IC SWITCH QUAD SPDT 20SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX394CWP

• Function: Switch
• Circuit: 4 x SPDT
• On-state Resistance: 35 Ohm
• Voltage Supply Source: Single, Dual Supply
• Voltage - Supply, Single/dual (±): 2.7 V ~ 15 V, ±2.7 V ~ 8 V
• Current - Supply: 1µA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The MAX394 switch operates with ±2.7V to ±8V bipolar
supplies and a +2.7V to +15V single supply. In either
case, analog signals ranging from V+ to V- can be
switched. The Typical Operating Characteristics graphs
show the typical on-resistance variation with analog signal
and supply voltage. The usual on-resistance temperature
coefficient is 0.5%/°C (typ).
Do not exceed the absolute maximum ratings, because
stresses beyond the listed ratings may cause perma-
nent damage to the device. Proper power-supply
sequencing is recommended for all CMOS devices.
Always apply V+, followed by V- (when using split sup-
plies) before applying analog signals or logic inputs,
especially if the analog or logic signals are not current-
limited. If this sequencing is not possible and if the ana-
log or logic inputs are not current-limited to less than
__________Applications Information
1, 10, 11, 20
2, 9, 12, 19
3, 8, 13, 18
4, 7,14, 17
PIN
15
16
5
6
Operation with Supply Voltages
COM1–COM4
NO1–NO4
NC1–NC4
IN1–IN4
NAME
_______________________________________________________________________________________
GND
N.C.
V+
V-
and Overvoltage Protection
Power-Supply Sequencing
Logic-Level Inputs
Normally Open Switches
Common Switch Poles
Normally Closed Switches
Negative Power Supply
Ground
Not Internally Connected
Positive Power Supply
Pin Description
Other than ±5V
FUNCTION
Low-Voltage, Quad, SPDT,
30mA, add a single diode (D1) for single-supply opera-
tion (Figure 1). If using dual supplies or if the analog
signal can dip below ground in single-supply operation,
add two small signal diodes (D1, D2), as shown in
Figure 1. Adding protection diodes reduces the analog
signal range to a diode drop above V- for D2. Leakage
is not affected by adding the diodes. On-resistance
increases by a small amount at low supply voltages.
Maximum supply voltage (V- to V+) must not exceed
17V.
Adding diodes D1 and D2 also protects against some
overvoltage situations. With the circuit of Figure 1, if the
supply voltage is below the absolute maximum rating
and if a fault voltage up to the absolute maximum rating
is applied to an analog signal pin, no damage will
result. For example, with ±5V supplies, analog signals
up to ±8.5V will not damage the circuit of Figure 1. If
only a single fault signal is present, the fault voltage
can go to +12V or -12V without damage.
Figure 1. Overvoltage Protection Using Blocking Diodes
CMOS Analog Switch
COM
*
*
V-
V+
-5V
+5V
D1
D2
MAX394
* INTERNAL PROTECTION DIODES
*
*
NO or NC
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