DG187AP/883 Equivalent & Substitute Parts

Part Overview

The DG187AP/883 is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Vishay Siliconix, configured as a 2:1 multiplexer/demultiplexer in a 14-DIP package. This component is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The part operates with dual supply voltages (±15V) and features a maximum on-state resistance of 30Ω with switching times of 150ns (Ton) and 130ns (Toff).

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	1
On-State Resistance (Max)	30Ω
Voltage - Supply, Dual (V±)	±15V
Switch Time Ton (Max)	150ns
Switch Time Toff (Max)	130ns
Channel Capacitance CS(off)	9pF
Channel Capacitance CD(off)	6pF
Current - Leakage IS(off) (Max)	1nA
Operating Temperature	-55°C ~ 125°C
Package / Case	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the DG187AP/883 is determined by the following critical parameters:

Switch topology: SPDT configuration with 2:1 multiplexer/demultiplexer function
Number of circuits: Single circuit requirement
Package compatibility: 14-DIP form factor with 0.300" (7.62mm) pitch for through-hole mounting
Operating temperature range: -55°C to 125°C
Supply voltage compatibility: Dual supply operation (±V range)
On-state resistance: Maximum 30Ω specification
Switching performance: Ton and Toff parameters within acceptable range

The identified substitute parts (DG301AAK/883B and DG305ACJ+) maintain the same switch topology, circuit count, package form factor, and mounting type. Both are active products from Analog Devices Inc./Maxim Integrated. However, substitution requires evaluation of parameter deviations, particularly on-state resistance (50Ω vs. 30Ω), supply voltage range (±5V ~ 18V vs. ±15V), and operating temperature range differences.

Parameter Comparison

Parameter	DG187AP/883 (Main)	DG301AAK/883B	DG305ACJ+
Manufacturer	Vishay Siliconix	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPDT	SPDT	SPDT
Multiplexer/Demultiplexer Circuit	2:1	2:1	2:1
Number of Circuits	1	1	1
On-State Resistance (Max)	30Ω	50Ω	50Ω
Voltage - Supply, Dual (V±)	±15V	±5V ~ 18V	±5V ~ 18V
Switch Time Ton (Max)	150ns	300ns	250ns
Switch Time Toff (Max)	130ns	250ns	150ns
Charge Injection	—	12pC	12pC
Channel Capacitance CS(off)	9pF	14pF	14pF
Channel Capacitance CD(off)	6pF	14pF	14pF
Current - Leakage IS(off) (Max)	1nA	1nA	5nA
Crosstalk	—	-74dB @ 500kHz	-74dB @ 500kHz
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	0°C ~ 70°C
Package / Case	14-DIP (0.300", 7.62mm)	14-CDIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

DG301AAK/883B is an active equivalent that maintains the full operating temperature range (-55°C ~ 125°C) matching the original DG187AP/883. This part is suitable for applications requiring extended temperature operation. The supply voltage range (±5V ~ 18V) encompasses the original ±15V specification. However, the on-state resistance is specified at 50Ω (versus 30Ω), and switching times are longer (Ton: 300ns, Toff: 250ns). The part remains RoHS non-compliant. Package designation is 14-CDIP, which maintains mechanical compatibility with 14-DIP footprints.

DG305ACJ+ is an active equivalent with RoHS3 compliance, making it suitable for applications subject to environmental regulations. The supply voltage range (±5V ~ 18V) is compatible with the original specification. However, this part has a reduced operating temperature range (0°C ~ 70°C), which does not cover the full -55°C to 125°C specification of the original. On-state resistance is 50Ω, and leakage current is specified at 5nA (versus 1nA). The package is 14-DIP, providing direct mechanical compatibility.

Selection between these substitutes depends on application requirements: DG301AAK/883B for extended temperature range applications; DG305ACJ+ for RoHS-compliant designs with standard industrial temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can DG301AAK/883B and DG305ACJ+ be used interchangeably with DG187AP/883?

A: Both parts share the same SPDT 2:1 switch topology and 14-DIP package form factor. However, they are not direct pin-for-pin replacements without circuit evaluation. The on-state resistance increase from 30Ω to 50Ω affects signal path impedance. DG301AAK/883B maintains the full temperature range; DG305ACJ+ does not. Application-specific testing is required to confirm functional compatibility.

Q: What is the difference between 14-DIP and 14-CDIP packages?

A: Both designations refer to 14-pin dual inline packages with 0.300" (7.62mm) pitch. The "C" in 14-CDIP indicates ceramic construction, while 14-DIP typically indicates plastic construction. Both are mechanically compatible with standard 14-DIP through-hole footprints on printed circuit boards.

Q: Why does DG305ACJ+ have a reduced operating temperature range?

A: The DG305ACJ+ is specified for 0°C ~ 70°C operation, which is narrower than the original DG187AP/883 range of -55°C ~ 125°C. Applications requiring operation below 0°C or above 70°C must use DG301AAK/883B or identify alternative parts with extended temperature specifications.

Q: Is RoHS compliance a factor in selecting a substitute?

A: RoHS compliance is determined by application requirements and regulatory jurisdiction. DG305ACJ+ is ROHS3 compliant, while DG301AAK/883B and the original DG187AP/883 are RoHS non-compliant. For applications subject to RoHS directives, DG305ACJ+ is the appropriate choice, provided its operating temperature range is acceptable.

Q: How do the switching time differences affect circuit performance?

A: The DG187AP/883 specifies Ton of 150ns and Toff of 130ns. DG301AAK/883B specifies Ton of 300ns and Toff of 250ns; DG305ACJ+ specifies Ton of 250ns and Toff of 150ns. Longer switching times may introduce additional propagation delay in high-speed signal routing applications. Circuit timing analysis is required to confirm acceptable performance with substitute parts.

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