DG202BAK Equivalent & Substitute Parts

Part Overview

The DG202BAK is a 4-circuit SPST-NO analog switch IC manufactured by Vishay Siliconix, housed in a 16-CERDIP package. This component functions as a precision electronic switch with low on-state resistance of 85Ohm maximum, designed for signal routing and multiplexing applications across industrial and commercial temperature ranges (-55°C to 125°C). The DG202BAK is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Single Pole Single Throw - Normally Open)
Number of Circuits	4
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	85Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm
Supply Voltage - Single (V+)	4.5V ~ 25V
Supply Voltage - Dual (V±)	±4.5V ~ 22V
Switch Time (Ton/Toff Max)	300ns / 200ns
Charge Injection	1pC
Channel Capacitance (CS(off) / CD(off))	5pF / 5pF
Leakage Current (IS(off) Max)	500pA
Crosstalk	-95dB @ 100kHz
Operating Temperature Range	-55°C ~ 125°C (TA)
Package Type	16-CERDIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the DG202BAK is determined by strict adherence to the following core parameters:

Primary Substitution Criteria:

Switch circuit topology: SPST - NO configuration
Circuit count: 4 independent circuits
Multiplexer ratio: 1:1
Package type: 16-CDIP or 16-CERDIP (through-hole, 0.300" pitch)
Operating temperature range: -55°C to 125°C minimum
Supply voltage compatibility: Dual supply operation (±4.5V ~ 18V minimum)

Secondary Compatibility Parameters:

On-state resistance: Maximum 175Ohm (allows higher resistance than original 85Ohm for applications not requiring low impedance)
Channel capacitance: 5pF maximum (CS(off) and CD(off))
Leakage current: Maximum 1nA
Crosstalk: -90dB @ 100kHz minimum

The DG202AK/883B qualifies as a direct substitute based on matching circuit topology, channel count, multiplexer configuration, package footprint, and operating temperature range. Differences in on-state resistance (175Ohm vs. 85Ohm), switch timing, and charge injection reflect manufacturing variations within the DG202 base product family and do not preclude substitution in applications where the specified maximum resistance is acceptable.

Parameter Comparison

Parameter	DG202BAK	DG202AK/883B	Compatibility Notes
Manufacturer	Vishay Siliconix	Analog Devices Inc./Maxim Integrated	Different manufacturers, same base product family
Switch Circuit	SPST - NO	SPST - NO	Identical topology
Number of Circuits	4	4	Identical
Multiplexer Configuration	1:1	1:1	Identical
On-State Resistance (Max)	85Ohm	175Ohm	Substitute has higher resistance; acceptable for applications not requiring low impedance
Channel-to-Channel Matching (ΔRon)	2Ohm	Not specified	Original specification provided; substitute data not available
Supply Voltage - Dual (V±)	±4.5V ~ 22V	±4.5V ~ 18V	Substitute has narrower range; compatible with ±4.5V ~ 18V applications
Switch Time (Ton/Toff Max)	300ns / 200ns	600ns / 450ns	Substitute has slower switching; acceptable for non-time-critical applications
Charge Injection	1pC	20pC	Substitute has higher charge injection; may affect precision analog applications
Channel Capacitance (CS(off) / CD(off))	5pF / 5pF	5pF / 5pF	Identical
Leakage Current (IS(off) Max)	500pA	1nA	Substitute has higher leakage; acceptable for most applications
Crosstalk	-95dB @ 100kHz	-90dB @ 100kHz	Substitute has slightly higher crosstalk; acceptable for most signal routing applications
Operating Temperature	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)	Identical
Package / Case	16-CERDIP (0.300", 7.62mm)	16-CDIP (0.300", 7.62mm)	Footprint compatible; both through-hole, 0.300" pitch
Mounting Type	Through Hole	Through Hole	Identical
Product Status	Obsolete	Active	Substitute is in active production
RoHS Status	RoHS non-compliant	RoHS non-compliant	Both non-compliant
REACH Status	REACH Unaffected	REACH Unaffected	Identical

Engineering Selection Recommendations

The DG202AK/883B is the designated manufacturer-recommended substitute for the obsolete DG202BAK. Selection of this substitute is justified on the following engineering grounds:

Product Status Consideration: The DG202BAK is classified as obsolete, making continued procurement impossible for new production. The DG202AK/883B maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance and Certification: Both parts share identical RoHS non-compliance and REACH unaffected status, maintaining regulatory consistency in applications where these certifications are not required. Both components carry the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Functional Compatibility: The substitute maintains the core switching architecture (SPST-NO, 4 circuits, 1:1 configuration) and operates across the identical temperature range (-55°C to 125°C). Through-hole package footprints are compatible, enabling direct board-level substitution without layout redesign.

Performance Trade-offs: The DG202AK/883B exhibits measurable differences in on-state resistance (175Ohm vs. 85Ohm), switch timing (600ns/450ns vs. 300ns/200ns), and charge injection (20pC vs. 1pC). These differences are acceptable in applications where signal impedance is not critical, switching speed is not time-constrained, and precision analog performance is not required. Applications requiring the original 85Ohm resistance, sub-300ns switching, or sub-1pC charge injection must evaluate alternative solutions outside the DG202 family.

Supply Voltage Consideration: The substitute operates within ±4.5V to ±18V dual supply range, which is narrower than the original ±4.5V to ±22V specification. Designs operating above ±18V dual supply must retain the original DG202BAK or identify alternative components.

Frequently Asked Questions (FAQ)

Q: Can the DG202AK/883B be used as a direct pin-for-pin replacement for the DG202BAK?

A: Yes, the DG202AK/883B is pin-compatible with the DG202BAK. Both components use the 16-CDIP/CERDIP package with identical 0.300" (7.62mm) pitch and through-hole mounting. No PCB layout modifications are required for substitution.

Q: What is the primary reason for substituting the DG202BAK?

A: The DG202BAK is obsolete and no longer manufactured. The DG202AK/883B is the manufacturer-recommended substitute and remains in active production, ensuring availability for new designs and ongoing production requirements.

Q: Are there applications where the DG202AK/883B cannot replace the DG202BAK?

A: Yes. Applications requiring on-state resistance of 85Ohm or lower, switch times faster than 600ns/450ns, charge injection below 20pC, or dual supply voltages exceeding ±18V must evaluate alternative components. The higher on-state resistance and slower switching characteristics of the substitute may degrade performance in precision analog signal routing, high-speed multiplexing, or low-impedance switching applications.

Q: What is the difference between 16-CERDIP and 16-CDIP packaging?

A: Both designations refer to 16-pin ceramic dual inline packages with 0.300" (7.62mm) pitch. CERDIP (Ceramic DIP) and CDIP (Ceramic Dual Inline Package) are equivalent package types suitable for through-hole mounting. The components are mechanically and electrically interchangeable at the board level.

Q: Does the DG202AK/883B meet the same regulatory requirements as the DG202BAK?

A: Both components share identical RoHS non-compliance and REACH unaffected status. If your application requires RoHS compliance, neither the original nor the substitute is suitable. Consult component datasheets and regulatory requirements for your specific application.

Q: What is the significance of the "/883B" designation in the DG202AK/883B part number?

A: The "/883B" suffix indicates compliance with MIL-STD-883 Class B specifications, which define reliability and quality standards for military and aerospace applications. This designation ensures the component meets enhanced screening and testing requirements beyond standard commercial specifications.

Q: Can I use the DG202AK/883B in applications requiring the original 85Ohm on-state resistance?

A: No. The DG202AK/883B has a maximum on-state resistance of 175Ohm, which is more than double the original 85Ohm specification. Applications requiring low impedance switching must identify alternative components or retain the original DG202BAK if available through inventory channels.

Q: What supply voltage range does the DG202AK/883B support?

A: The DG202AK/883B operates with dual supply voltages of ±4.5V to ±18V. This is narrower than the original DG202BAK range of ±4.5V to ±22V. Designs requiring operation above ±18V must evaluate alternative solutions.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message