DG508ABK Equivalent & Substitute Parts

Part Overview

The DG508ABK is an 8:1 analog multiplexer/demultiplexer integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This single-circuit switch device features a maximum on-state resistance of 450Ohm and operates across a wide supply voltage range of ±4.5V to ±18V. The component is housed in a 16-CERDIP through-hole package and maintains Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified when circuit topology, switching characteristics, and electrical parameters align within acceptable operational tolerances for the target application.

Substiute Parts

DG508ABK

Analog Devices Inc./Maxim IntegratedIn Stock: 1615DG508ABK Datasheet

Current PartRFQ

MPC508AP

Texas InstrumentsIn Stock: 4340MPC508AP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DG508ABK is determined by strict equivalence in the following critical parameters:

Primary Substitution Criteria:

• Multiplexer/Demultiplexer circuit configuration: 8:1 topology
• Number of circuits: Single circuit (1)
• Mounting type: Through-hole technology
• Package footprint compatibility: 16-pin DIP-class packages (16-CDIP, 16-PDIP, 16-DIP)
• Product status: Active manufacturing status
• Regulatory compliance: RoHS3 and REACH compliance maintained

Secondary Compatibility Parameters:

• On-state resistance: Substitute devices must operate within application-specific impedance requirements
• Supply voltage range: Dual supply operation (V±) with minimum ±4.5V capability
• Operating temperature range: Minimum coverage of -20°C to 85°C
• Leakage current and channel capacitance: Must remain within acceptable signal integrity limits

The MPC508AP from Texas Instruments qualifies as a direct substitute based on identical 8:1 multiplexer topology, single-circuit configuration, through-hole mounting, and 16-pin DIP package compatibility. While on-state resistance differs (1.5kOhm vs. 450Ohm), this parameter variation is application-dependent and does not preclude substitution in circuits where higher impedance is acceptable.

Parameter Comparison

Engineering Selection Recommendations

DG508ABK Selection Criteria:

• Applications requiring on-state resistance of 450Ohm or lower
• Circuits operating within ±4.5V to ±18V dual supply range
• Systems with operating temperature requirements between -20°C and 85°C
• Designs utilizing 16-CERDIP package footprint
• Active product status ensures continued manufacturing support and supply chain availability
• RoHS3 compliance and MSL Level 1 rating support standard PCB assembly processes

MPC508AP Selection Criteria:

• Applications tolerant of 1.5kOhm on-state resistance
• Circuits requiring extended operating temperature range (-40°C to 85°C)
• Systems operating within ±5V to ±22V dual supply range
• Designs compatible with 16-PDIP package footprint
• Active product status from Texas Instruments ensures manufacturing continuity
• RoHS3 compliance maintains regulatory alignment

Both devices maintain Active product status, full RoHS3 compliance, and REACH compliance. Package footprint compatibility (16-pin DIP-class) and through-hole mounting enable direct PCB layout substitution. The primary design consideration is on-state resistance: the DG508ABK provides lower impedance (450Ohm), while the MPC508AP offers higher impedance (1.5kOhm) with extended temperature range capability.

Frequently Asked Questions (FAQ)

Q: Can the MPC508AP directly replace the DG508ABK in existing circuit designs?

A: Direct replacement is possible when circuit impedance requirements accommodate the MPC508AP's 1.5kOhm on-state resistance versus the DG508ABK's 450Ohm specification. Both devices feature identical 8:1 multiplexer topology, single-circuit configuration, and compatible 16-pin DIP package footprints. PCB layout modifications are not required due to matching pin pitch and package dimensions.

Q: What is the primary difference between these two devices?

A: The on-state resistance differs significantly: DG508ABK provides 450Ohm maximum, while MPC508AP provides 1.5kOhm maximum. This parameter directly affects signal attenuation and impedance matching in analog signal routing applications. The MPC508AP also offers extended operating temperature range (-40°C to 85°C) compared to the DG508ABK (-20°C to 85°C).

Q: Are both devices RoHS3 compliant?

A: Yes. Both the DG508ABK and MPC508AP maintain full RoHS3 compliance and REACH compliance status, supporting standard PCB assembly and environmental regulatory requirements.

Q: What package types are used for these devices?

A: The DG508ABK uses 16-CERDIP (ceramic dual in-line package), while the MPC508AP uses 16-PDIP (plastic dual in-line package). Both are 16-pin through-hole packages with identical 0.300" (7.62mm) pitch and footprint compatibility for direct PCB substitution.

Q: Which device should be selected for low-impedance signal routing applications?

A: The DG508ABK is specified for applications requiring lower on-state resistance (450Ohm maximum). This characteristic reduces signal attenuation and is preferred in precision analog signal multiplexing where impedance matching is critical.

Q: What supply voltage ranges are supported?

A: The DG508ABK operates with dual supply (V±) from ±4.5V to ±18V. The MPC508AP extends this range to ±5V to ±22V, providing greater flexibility in systems with higher supply voltage requirements.

Q: Are there inventory considerations for these parts?

A: Both devices maintain Active product status with current manufacturing. The DG508ABK has 1515 pieces in stock, while the MPC508AP has 4272 pieces in stock, indicating stable supply availability from both manufacturers.