DG201AAK Equivalent & Substitute Parts

Part Overview

The DG201AAK is a 4-circuit IC switch with SPST-NC (Single Pole Single Throw - Normally Closed) configuration manufactured by Vishay Siliconix. This interface component operates with dual supply voltage (±15V) and features 175Ohm on-state resistance, making it suitable for analog switching applications requiring low on-resistance and fast switching performance. The DG201AAK is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing system support and new designs.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NC
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	175Ohm
Voltage - Supply, Dual (V±)	±15V
Switch Time - Ton (Max)	600ns
Switch Time - Toff (Max)	450ns
Charge Injection	20pC
Channel Capacitance - CS(off)	5pF
Channel Capacitance - CD(off)	5pF
Current - Leakage (IS(off)) (Max)	1nA
Crosstalk	-90dB @ 100kHz
Operating Temperature Range	-55°C ~ 125°C (TA)
Package / Case	16-CDIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DG201AAK is determined by strict equivalence across the following critical parameters:

Switch Circuit Configuration: SPST - NC topology must be maintained
Number of Circuits: 4-circuit configuration required
On-State Resistance: 175Ohm maximum specification
Switching Performance: Ton (600ns max) and Toff (450ns max) characteristics
Electrical Isolation: Charge injection (20pC), channel capacitance (5pF each), and crosstalk (-90dB @ 100kHz)
Leakage Current: 1nA maximum specification
Package Compatibility: 16-CDIP through-hole mounting
Operating Temperature: -55°C ~ 125°C range

The DG201AAK/883B qualifies as a direct substitute based on matching all critical electrical parameters and package specifications. The primary distinction is the dual supply voltage range specification: DG201AAK/883B supports ±4.5V ~ 18V, providing broader operational flexibility while maintaining identical switching characteristics and on-state resistance.

Parameter Comparison

Parameter	DG201AAK (Vishay Siliconix)	DG201AAK/883B (Analog Devices Inc./Maxim Integrated)
Switch Circuit	SPST - NC	SPST - NC
Number of Circuits	4	4
Multiplexer/Demultiplexer Circuit	1:1	1:1
On-State Resistance (Max)	175Ohm	175Ohm
Voltage - Supply, Dual (V±)	±15V	±4.5V ~ 18V
Switch Time - Ton (Max)	600ns	600ns
Switch Time - Toff (Max)	450ns	450ns
Charge Injection	20pC	20pC
Channel Capacitance - CS(off)	5pF	5pF
Channel Capacitance - CD(off)	5pF	5pF
Current - Leakage (IS(off)) (Max)	1nA	1nA
Crosstalk	-90dB @ 100kHz	-90dB @ 100kHz
Operating Temperature Range	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)
Package / Case	16-CDIP (0.300", 7.62mm)	16-CDIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The DG201AAK/883B is the qualified substitute for the obsolete DG201AAK. Both parts maintain identical electrical switching characteristics, on-state resistance, and package specifications. The DG201AAK/883B offers the advantage of active product status, ensuring continued availability and manufacturing support. The expanded dual supply voltage range (±4.5V ~ 18V versus ±15V) provides operational flexibility for systems with variable supply requirements while maintaining full backward compatibility with designs specified for ±15V operation. Both parts carry identical RoHS non-compliance and MSL ratings, requiring equivalent handling and storage protocols. Selection between these parts should be based on supply chain availability and long-term component lifecycle requirements.

Frequently Asked Questions (FAQ)

Q: Can DG201AAK/883B directly replace DG201AAK in existing designs?

A: Yes. The DG201AAK/883B maintains identical electrical specifications for on-state resistance (175Ohm), switching times (600ns/450ns), charge injection (20pC), channel capacitance (5pF), leakage current (1nA), and crosstalk (-90dB @ 100kHz). Package configuration and pin assignments are identical (16-CDIP through-hole). The expanded supply voltage range (±4.5V ~ 18V) is backward compatible with ±15V operation.

Q: What is the primary difference between DG201AAK and DG201AAK/883B?

A: The DG201AAK/883B supports a broader dual supply voltage range (±4.5V ~ 18V) compared to the DG201AAK (±15V). Additionally, DG201AAK/883B maintains active product status while DG201AAK is obsolete. All other electrical and mechanical specifications are identical.

Q: Are there any package or mounting differences?

A: No. Both parts use identical 16-CDIP (0.300", 7.62mm) through-hole packaging. Pin configuration and board layout compatibility are maintained.

Q: What compliance considerations apply to both parts?

A: Both DG201AAK and DG201AAK/883B are RoHS non-compliant and carry MSL rating of 1 (Unlimited). Equivalent handling, storage, and environmental protocols apply to both parts.

Q: Why is the DG201AAK classified as obsolete?

A: The DG201AAK is listed as obsolete by the original manufacturer. The DG201AAK/883B, offered by Analog Devices Inc./Maxim Integrated, provides continued availability and active manufacturing support for this switch circuit topology.

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