DG211BDJ Equivalent & Substitute Parts

Part Overview

The DG211BDJ is a 4-circuit SPST-NC analog switch IC manufactured by Vishay Siliconix in a 16-DIP package. This component features 85Ohm on-state resistance and operates across supply voltages of 4.5V to 25V (single supply) or ±4.5V to ±22V (dual supply). The DG211BDJ is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Active alternatives with comparable or enhanced electrical characteristics are available from Analog Devices Inc. and Maxim Integrated.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NC (Single Pole Single Throw - Normally Closed)
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	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DG211BDJ is determined by the following critical parameters: switch circuit topology (SPST-NC), number of circuits (4), package type (16-DIP through-hole), and electrical performance within acceptable ranges. The substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Equivalent (Pin-Compatible, Identical Electrical Performance): DG211BDJ-E3 maintains identical electrical specifications and package configuration. This part is the direct successor with active product status and improved RoHS compliance.

Functional Equivalents (Same Circuit Topology, Different On-State Resistance): Parts including ADG211AKNZ, DG211CJ+, DG211DJ+, MAX4601CPE+, MAX4601EPE+, MAX4604CPE+, and MAX4661CPE+ share the SPST-NC 4-circuit topology and 16-DIP package. These parts differ in on-state resistance (ranging from 2.5Ohm to 175Ohm), supply voltage ranges, switching speed, and leakage characteristics. Selection depends on the specific application requirements for resistance, speed, and supply voltage compatibility.

Key Substitution Criteria:

Package compatibility: 16-DIP through-hole form factor
Circuit topology: SPST-NC with 4 independent circuits
Supply voltage overlap with application requirements
On-state resistance acceptable for signal path impedance
Switching speed and charge injection suitable for application bandwidth
Operating temperature range coverage

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	ΔRon	V+ Supply	V± Supply	Ton/Toff (Max)	Charge Injection	Leakage (Max)	Crosstalk	Temp Range	Product Status	RoHS
DG211BDJ	Vishay Siliconix	85Ohm	2Ohm	4.5V ~ 25V	±4.5V ~ ±22V	300ns / 200ns	1pC	500pA	-95dB @ 100kHz	-40°C ~ 85°C	Obsolete	Non-compliant
DG211BDJ-E3	Vishay Siliconix	85Ohm	2Ohm	4.5V ~ 25V	±4.5V ~ ±22V	300ns / 200ns	1pC	500pA	-95dB @ 100kHz	-40°C ~ 85°C	Active	ROHS3 Compliant
ADG211AKNZ	Analog Devices Inc.	115Ohm	5.75Ohm	15V	±15V	600ns / 450ns	20pC	5nA	-80dB @ 100kHz	-40°C ~ 85°C	Active	ROHS3 Compliant
DG211CJ+	Analog Devices Inc./Maxim Integrated	175Ohm	—	—	±4.5V ~ ±18V	1µs / 500ns	—	5nA	-90dB @ 100kHz	0°C ~ 70°C	Active	ROHS3 Compliant
DG211DJ+	Analog Devices Inc./Maxim Integrated	175Ohm	—	4.5V ~ 18V	±4.5V ~ ±18V	1µs / 500ns	—	5nA	-90dB @ 100kHz	-40°C ~ 85°C	Active	ROHS3 Compliant
MAX4601CPE+	Analog Devices Inc./Maxim Integrated	2.5Ohm	100mOhm	4.5V ~ 36V	±4.5V ~ ±20V	250ns / 350ns	120pC	500pA	-59dB @ 1MHz	0°C ~ 70°C	Active	ROHS3 Compliant
MAX4604CPE+	Analog Devices Inc./Maxim Integrated	4Ohm	200mOhm	4.5V ~ 36V	±4.5V ~ ±20V	120ns / 130ns	225pC	500pA	-60dB @ 1MHz	0°C ~ 70°C	Active	ROHS3 Compliant
MAX4661CPE+	Analog Devices Inc./Maxim Integrated	2.5Ohm	100mOhm	4.5V ~ 36V	±4.5V ~ ±20V	275ns / 175ns	300pC	500pA	-59dB @ 1MHz	0°C ~ 70°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Choice): DG211BDJ-E3 is the preferred substitute. It provides identical electrical performance and package compatibility while offering active product status and ROHS3 compliance. This part eliminates design re-qualification and maintains full backward compatibility.

For Applications Requiring Extended Temperature Range (-40°C to 85°C): DG211DJ+ supports the full temperature range of the original DG211BDJ while maintaining SPST-NC 4-circuit topology and 16-DIP packaging. This part is suitable when temperature extremes are critical to application performance.

For Applications Requiring Lower On-State Resistance: MAX4601CPE+ and MAX4661CPE+ offer 2.5Ohm on-state resistance, significantly lower than the original 85Ohm specification. These parts are applicable when signal path impedance must be minimized. Both support extended supply voltage ranges (4.5V to 36V single supply) and maintain active product status with ROHS3 compliance. Operating temperature is limited to 0°C to 70°C.

For Applications Requiring Faster Switching: MAX4604CPE+ provides the fastest switching times (120ns/130ns) among available substitutes with 4Ohm on-state resistance. This part is suitable for high-speed switching applications within the 0°C to 70°C operating range.

For Applications with Restricted Supply Voltage (±15V Fixed Supply): ADG211AKNZ is designed for fixed ±15V dual supply operation. This part maintains the full -40°C to 85°C temperature range and is applicable only when supply voltage is constrained to ±15V.

All recommended substitutes carry ROHS3 compliance and active product status, ensuring long-term availability and regulatory compliance for new designs.

Frequently Asked Questions (FAQ)

Q: Can DG211BDJ-E3 be used as a direct drop-in replacement for DG211BDJ? A: Yes. DG211BDJ-E3 maintains identical electrical specifications, on-state resistance (85Ohm), supply voltage ranges, switching characteristics, and 16-DIP package configuration. The only differences are active product status and improved RoHS compliance.

Q: What is the primary reason to substitute the DG211BDJ? A: The DG211BDJ is classified as obsolete. DG211BDJ-E3 provides the same functionality with active availability and regulatory compliance for new production and long-term supply assurance.

Q: Are the MAX4601 and MAX4604 series compatible with the DG211BDJ? A: These parts share the SPST-NC 4-circuit topology and 16-DIP package but differ significantly in on-state resistance (2.5Ohm to 4Ohm versus 85Ohm), switching speed, and charge injection. They are functionally compatible only if the application can tolerate lower impedance and faster switching characteristics. Operating temperature is limited to 0°C to 70°C.

Q: What is the difference between DG211CJ+ and DG211DJ+? A: Both parts feature 175Ohm on-state resistance and SPST-NC 4-circuit topology in 16-DIP packaging. DG211DJ+ supports both single supply (4.5V to 18V) and dual supply (±4.5V to ±18V) operation across the full -40°C to 85°C temperature range. DG211CJ+ supports only dual supply (±4.5V to ±18V) operation and is limited to 0°C to 70°C.

Q: Can I use a substitute part with different on-state resistance? A: On-state resistance substitution depends on application requirements. Lower resistance (2.5Ohm to 4Ohm) reduces signal path impedance and is suitable for low-impedance switching applications. Higher resistance (115Ohm to 175Ohm) is acceptable only if the application tolerates increased impedance. The original 85Ohm specification should be matched or closely approximated unless application analysis confirms tolerance for deviation.

Q: Are all substitute parts RoHS compliant? A: All recommended substitutes carry ROHS3 compliance. The original DG211BDJ is RoHS non-compliant. Compliance is mandatory for new designs and many production environments.

Q: What is the impact of different charge injection values? A: Charge injection affects signal accuracy in precision analog switching applications. The DG211BDJ specifies 1pC charge injection. Substitutes range from 1pC (DG211BDJ-E3) to 300pC (MAX4661CPE+). Higher charge injection may introduce signal distortion in sensitive applications. Selection should match application bandwidth and signal integrity requirements.

Q: Can I use MAX4601EPE+ as a substitute? A: MAX4601EPE+ is classified as obsolete and is not recommended for new designs. While it shares the 4-circuit SPST-NC topology and 16-DIP package, its obsolete status makes it unsuitable for production applications requiring long-term supply assurance.

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