MPC508AUG4 Equivalent & Substitute Parts

Part Overview

The MPC508AUG4 is an 8:1 analog multiplexer/demultiplexer IC manufactured by Texas Instruments, housed in a 16-SOIC package with 1.5kOhm on-state resistance. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain the 8:1 multiplexer configuration, 16-SOIC package format, and compatible operating temperature range to ensure direct replacement capability.

Key Parameters

Parameter	MPC508AUG4
Multiplexer/Demultiplexer Circuit	8:1
Number of Circuits	1
On-State Resistance (Max)	1.5kOhm
Voltage - Supply, Dual (V±)	±5V ~ 22V
Switch Time (Ton, Toff) (Max)	200ns, 250ns (Typ)
Channel Capacitance (CS(off), CD(off))	5pF, 25pF
Current - Leakage (IS(off)) (Max)	500pA (Typ)
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the MPC508AUG4 is determined by the following critical parameters:

Multiplexer Configuration: All substitutes must maintain 8:1 multiplexer/demultiplexer topology with single circuit
Package Format: 16-SOIC surface mount package required for PCB compatibility
Operating Temperature Range: Minimum -40°C ~ 85°C to match original specifications
Supply Voltage Compatibility: Dual supply operation (±V) within or overlapping the ±5V ~ 22V range
On-State Resistance: Lower resistance values (300Ohm, 270Ohm, 450Ohm) are acceptable as they represent improved performance characteristics
RoHS Compliance: ROHS3 compliance required for regulatory alignment

Substitute parts are grouped by on-state resistance characteristics and packaging format, as these parameters directly impact signal integrity and board-level integration.

Parameter Comparison

Parameter	MPC508AUG4	ADG508AKRZ	ADG508AKRZ-REEL7	ADG508FBRNZ	ADG508FBRNZ-REEL7	ADG508FBRWZ	ADG508FBRWZ-REEL	DG508ACWE+	DG508ACWE+T	DG508ADY+
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim
Multiplexer/Demultiplexer Circuit	8:1	8:1	8:1	8:1	8:1	8:1	8:1	8:1	8:1	8:1
Number of Circuits	1	1	1	1	1	1	1	1	1	1
On-State Resistance (Max)	1.5kOhm	300Ohm	300Ohm	270Ohm (Typ)	270Ohm (Typ)	270Ohm (Typ)	270Ohm (Typ)	450Ohm	450Ohm	450Ohm
Voltage - Supply, Dual (V±)	±5V ~ 22V	±10.8V ~ 16.5V	±10.8V ~ 16.5V	±15V	±15V	±15V	±15V	±4.5V ~ 18V	±4.5V ~ 18V	±4.5V ~ 18V
Switch Time (Ton, Toff) (Max)	200ns, 250ns (Typ)	300ns, 300ns	300ns, 300ns	230ns, 130ns	230ns, 130ns	230ns, 130ns	230ns, 130ns	1.5µs, 1µs	1.5µs, 1µs	1.5µs, 1µs
Channel Capacitance (CS(off), CD(off))	5pF, 25pF	5pF, 22pF	5pF, 22pF	3pF, 22pF	3pF, 22pF	3pF, 22pF	3pF, 22pF	5pF, 25pF	5pF, 25pF	5pF, 25pF
Current - Leakage (IS(off)) (Max)	500pA (Typ)	1nA	1nA	1nA	1nA	1nA	1nA	1nA	1nA	1nA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs)

ADG508AKRZ-REEL7 and ADG508FBRWZ-REEL are the preferred substitutes. Both maintain the 16-SOIC (0.295", 7.50mm Width) package matching the original MPC508AUG4 footprint, ensuring direct PCB compatibility without layout modifications. These parts are in active production with unlimited MSL ratings, providing superior long-term availability and storage flexibility compared to the discontinued original part.

Secondary Substitutes (Package Consideration Required)

ADG508AKRZ, ADG508FBRNZ, ADG508FBRNZ-REEL7, and DG508ADY+ utilize the narrower 16-SOIC (0.154", 3.90mm Width) package. While electrically compatible, these require PCB footprint verification before implementation. All maintain the -40°C ~ 85°C operating temperature range and ROHS3 compliance.

Alternative Substitutes (Supply Voltage Limitation)

DG508ACWE+ and DG508ACWE+T operate within the ±4.5V ~ 18V supply range, which overlaps but does not fully cover the original ±5V ~ 22V specification. These are suitable only for applications operating within the ±4.5V ~ 18V window. Operating temperature range is limited to 0°C ~ 70°C, restricting use in extended temperature environments.

Resistance Profile Considerations

ADG508AKRZ series: 300Ohm on-state resistance provides lower signal attenuation
ADG508FBRNZ series: 270Ohm on-state resistance offers optimal performance for low-impedance signal paths
DG508 series: 450Ohm on-state resistance represents a compromise between the original 1.5kOhm and lower-resistance alternatives

All substitute parts are ROHS3 compliant and maintain regulatory alignment with the original specification.

Frequently Asked Questions (FAQ)

Q: Can ADG508AKRZ-REEL7 directly replace MPC508AUG4 without PCB modifications?

A: Yes. ADG508AKRZ-REEL7 maintains the identical 16-SOIC (0.295", 7.50mm Width) package footprint as the MPC508AUG4, enabling direct pin-compatible replacement without PCB layout changes.

Q: What is the primary difference between ADG508AKRZ and ADG508FBRNZ?

A: The primary difference is on-state resistance: ADG508AKRZ operates at 300Ohm maximum, while ADG508FBRNZ operates at 270Ohm typical. Both maintain identical 8:1 multiplexer configuration, 16-SOIC packaging options, and -40°C ~ 85°C operating temperature range. Selection depends on signal path impedance requirements.

Q: Are DG508ACWE+ and DG508ACWE+T suitable for applications requiring ±22V supply operation?

A: No. DG508ACWE+ and DG508ACWE+T are rated for ±4.5V ~ 18V dual supply operation, which does not extend to the original ±5V ~ 22V specification. These parts are suitable only for applications operating within the ±4.5V ~ 18V window.

Q: What is the significance of MSL rating differences between MPC508AUG4 and substitute parts?

A: MPC508AUG4 carries MSL 2 (1 Year) rating, while all substitute parts carry MSL 1 (Unlimited) rating. This indicates substitute parts have superior moisture resistance and indefinite shelf life under controlled storage conditions, reducing risk of moisture-induced failures during extended inventory periods.

Q: Do all substitute parts maintain the -40°C ~ 85°C operating temperature range?

A: No. ADG508AKRZ, ADG508FBRNZ, ADG508FBRNZ-REEL7, and DG508ADY+ maintain -40°C ~ 85°C operation. DG508ACWE+ and DG508ACWE+T are limited to 0°C ~ 70°C operation, restricting use in extended temperature environments.

Q: Which substitute offers the lowest on-state resistance?

A: ADG508FBRNZ and ADG508FBRNZ-REEL7 offer 270Ohm typical on-state resistance, the lowest among available substitutes. This provides superior signal fidelity for low-impedance signal paths compared to the original 1.5kOhm specification.

Q: Are packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) electrically equivalent?

A: Yes. Packaging variants of the same base part number (e.g., ADG508AKRZ, ADG508AKRZ-REEL, ADG508AKRZ-REEL7) are electrically identical. Packaging selection is determined by procurement volume and assembly process requirements, not electrical performance.

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