DG508ACJZ Equivalent & Substitute Parts

Part Overview

The DG508ACJZ is an 8:1 analog multiplexer/demultiplexer IC manufactured by Renesas Electronics Corporation, housed in a 16-DIP package. This device features a 400Ohm on-state resistance and operates with dual supply voltages (±15V). The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Key Parameters

Parameter	DG508ACJZ Value
Multiplexer Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	400Ohm
Channel-to-Channel Matching (ΔRon)	24Ohm
Voltage - Supply, Dual (V±)	±15V
Switch Time (Ton, Toff) (Max)	1.5µs, 1µs
Charge Injection	4pC
Channel Capacitance (CS(off), CD(off))	5pF, 25pF
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	0°C ~ 70°C
Package / Case	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DG508ACJZ is determined by the following critical parameters:

Primary Substitution Criteria:

Multiplexer configuration: 8:1 topology
Package type: 16-DIP form factor
On-state resistance range: 300Ohm to 450Ohm (within acceptable tolerance for signal path applications)
Supply voltage compatibility: Dual supply operation (±V range)
Leakage current: Maximum 1nA to 500pA
Operating temperature: Minimum 0°C to 70°C coverage

Substitution Groups:

Group 1 - Direct Resistance Match (400Ohm): Parts with on-state resistance at or near 400Ohm, suitable for applications requiring minimal impedance variation from the original DG508ACJZ.

Group 2 - Lower Resistance (270Ohm to 380Ohm): Parts with reduced on-state resistance, offering improved signal integrity and faster switching characteristics. Compatible with applications tolerant of lower impedance.

Group 3 - Higher Resistance (450Ohm): Parts with slightly elevated on-state resistance, maintaining functional compatibility within typical signal routing applications.

Group 4 - High Impedance (4.6kOhm): Parts with significantly higher on-state resistance, suitable only for applications where signal attenuation is acceptable or where high impedance is required.

Group 5 - Low Voltage Operation (30Ohm): Parts optimized for 3.3V to 5V supply rails, not directly compatible with ±15V supply requirement of the original part.

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	ΔRon (Max)	Supply Voltage (V±)	Switch Time Ton/Toff (Max)	Charge Injection	Operating Temp	Product Status
DG508ACJZ	Renesas Electronics	400Ohm	24Ohm	±15V	1.5µs / 1µs	4pC	0°C ~ 70°C	Obsolete
ADG508AKNZ	Analog Devices Inc.	300Ohm	15Ohm	±10.8V ~ 16.5V	300ns / 300ns	4pC	-40°C ~ 85°C	Active
ADG508FBNZ	Analog Devices Inc.	270Ohm (Typ)	8.1Ohm	±15V	230ns / 130ns	15pC	-40°C ~ 85°C	Active
ADG608BNZ	Analog Devices Inc.	30Ohm	5Ohm (Max)	±5V	75ns / 45ns	6pC	-40°C ~ 85°C	Active
DG508ACJ+	Analog Devices Inc./Maxim Integrated	450Ohm	27Ohm	±4.5V ~ 18V	1.5µs / 1µs	—	0°C ~ 70°C	Active
DG508ADJ+	Analog Devices Inc./Maxim Integrated	450Ohm	27Ohm	±4.5V ~ 18V	1.5µs / 1µs	—	-40°C ~ 85°C	Active
DG508BEJ-E3	Vishay Siliconix	380Ohm	10Ohm	±5V ~ 20V	250ns / 240ns	2pC	-40°C ~ 125°C	Active
MAX328CPE+	Analog Devices Inc./Maxim Integrated	4.6kOhm	70Ohm	±5V ~ 18V	1.5µs / 1µs	2pC	0°C ~ 70°C	Active
MAX328EPE+	Analog Devices Inc./Maxim Integrated	4.6kOhm	70Ohm	±5V ~ 18V	1.5µs / 1µs	2pC	-40°C ~ 85°C	Active
MAX338CPE+	Analog Devices Inc./Maxim Integrated	400Ohm	4Ohm	±4.5V ~ 20V	500ns / 500ns	1.5pC	0°C ~ 70°C	Active
MAX338EPE+	Analog Devices Inc./Maxim Integrated	400Ohm	4Ohm	±4.5V ~ 20V	500ns / 500ns	1.5pC	-40°C ~ 85°C	Active

Engineering Selection Recommendations

For Direct Replacement (Minimum Design Changes):

MAX338CPE+ and MAX338EPE+ provide the closest functional match to DG508ACJZ. Both maintain 400Ohm on-state resistance, 16-DIP packaging, and dual supply operation. MAX338EPE+ extends operating temperature to -40°C ~ 85°C, offering broader environmental coverage. Both parts are ROHS3 compliant and carry active product status, ensuring long-term availability.

For Improved Performance (Acceptable Design Modifications):

ADG508AKNZ and DG508BEJ-E3 offer superior switching characteristics with reduced on-state resistance (300Ohm and 380Ohm respectively) and faster switching times. ADG508AKNZ supports supply range ±10.8V ~ 16.5V, compatible with ±15V operation. DG508BEJ-E3 extends operating temperature to -40°C ~ 125°C and provides -88dB crosstalk specification at 1MHz. Both require verification of signal path impedance tolerance in the target application.

For Cost-Optimized Solutions (Application-Dependent):

DG508ACJ+ and DG508ADJ+ maintain identical electrical characteristics (450Ohm on-state resistance, 1.5µs/1µs switching times) with supply range ±4.5V ~ 18V. DG508ADJ+ provides extended temperature range (-40°C ~ 85°C). These parts introduce 50Ohm additional impedance and require confirmation that signal attenuation remains within system specifications.

Not Recommended for Direct Substitution:

ADG608BNZ operates at 3.3V to 5V supply rails and is incompatible with ±15V supply requirement. MAX328CPE+ and MAX328EPE+ feature 4.6kOhm on-state resistance, introducing significant signal attenuation unsuitable for general-purpose multiplexing applications requiring the original 400Ohm impedance.

Frequently Asked Questions (FAQ)

Q: Can MAX338CPE+ directly replace DG508ACJZ without circuit modifications?

A: Yes. MAX338CPE+ maintains identical 400Ohm on-state resistance, 16-DIP package, and dual supply operation (±4.5V ~ 20V encompasses ±15V). Both are ROHS3 compliant with 1 (Unlimited) MSL rating. Operating temperature differs (0°C ~ 70°C vs. 0°C ~ 70°C), requiring no thermal design changes for equivalent temperature range applications.

Q: What is the primary difference between ADG508AKNZ and DG508BEJ-E3?

A: ADG508AKNZ features 300Ohm on-state resistance with 300ns switching time and operates at ±10.8V ~ 16.5V. DG508BEJ-E3 provides 380Ohm on-state resistance with 250ns switching time and operates at ±5V ~ 20V. DG508BEJ-E3 offers extended temperature range (-40°C ~ 125°C) and superior crosstalk performance (-88dB @ 1MHz). Selection depends on impedance tolerance and thermal requirements.

Q: Why is ADG608BNZ listed as a substitute if it operates at different supply voltages?

A: ADG608BNZ is included for reference only and is not a direct substitute for ±15V supply applications. It is suitable only for systems redesigned to operate at 3.3V to 5V supply rails. Its 30Ohm on-state resistance and 75ns switching time represent superior performance characteristics for low-voltage applications.

Q: Are all substitute parts available in the same 16-DIP package?

A: Yes. All listed substitute parts are housed in 16-DIP (0.300", 7.62mm) packages, ensuring mechanical compatibility with DG508ACJZ PCB layouts. No package adapter or redesign is required for physical installation.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts listed are ROHS3 compliant, REACH unaffected, and carry ECCN EAR99 classification. Moisture sensitivity level is 1 (Unlimited) for all parts, matching the original DG508ACJZ specification.

Q: Can DG508ACJ+ and DG508ADJ+ be used interchangeably?

A: Both parts share identical electrical specifications (450Ohm on-state resistance, 1.5µs/1µs switching times, ±4.5V ~ 18V supply). The primary difference is operating temperature range: DG508ACJ+ operates 0°C ~ 70°C, while DG508ADJ+ operates -40°C ~ 85°C. Selection depends on target application temperature requirements.

Q: What is the significance of charge injection values in multiplexer selection?

A: Charge injection affects signal accuracy in analog switching applications. DG508ACJZ specifies 4pC charge injection. Substitute parts range from 1.5pC (MAX338 series) to 15pC (ADG508FBNZ). Lower charge injection reduces signal distortion in precision analog circuits. Applications with stringent signal fidelity requirements should prioritize parts with charge injection ≤ 4pC.

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