DG508ACJ Equivalent & Substitute Parts

Part Overview

The DG508ACJ is an 8:1 analog multiplexer/demultiplexer IC manufactured by Renesas Electronics Corporation, housed in a 16-DIP package. This component features a single circuit configuration with 400Ohm on-state resistance and operates under dual supply voltage (±15V). The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching multiplexer configuration, package type, and electrical operating parameters.

Key Parameters

Parameter	DG508ACJ
Multiplexer Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	400Ohm
Channel-to-Channel Matching (ΔRon)	24Ohm
Voltage Supply (Dual)	±15V
Switch Time (Ton/Toff)	1.5µs / 1µs
Charge Injection	4pC
Channel Capacitance (CS(off)/CD(off))	5pF / 25pF
Leakage Current (IS(off) Max)	1nA
Operating Temperature	0°C ~ 70°C
Package / Case	16-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DG508ACJ is determined by the following critical parameters:

Primary Compatibility Criteria:

Multiplexer configuration must be 8:1
Single circuit requirement
16-DIP package (0.300", 7.62mm) for through-hole mounting
Dual supply voltage operation capability

Secondary Selection Factors:

On-state resistance tolerance (400Ohm nominal for DG508ACJ)
Channel-to-Channel matching (ΔRon)
Switch timing characteristics (Ton/Toff)
Operating temperature range
Leakage current specifications
RoHS and regulatory compliance status

Substitute parts are grouped into three categories based on on-state resistance characteristics: lower resistance variants (30Ohm to 300Ohm), matched resistance variants (380Ohm to 450Ohm), and higher resistance variants (4.6kOhm). Selection depends on circuit impedance requirements and signal bandwidth constraints.

Parameter Comparison

Part Number	Manufacturer	Mux Config	Ron (Max)	ΔRon	Dual Supply	Ton/Toff (Max)	Temp Range	Status	RoHS
DG508ACJ	Renesas	8:1	400Ohm	24Ohm	±15V	1.5µs/1µs	0°C~70°C	Obsolete	Non-compliant
ADG508AKNZ	Analog Devices	8:1	300Ohm	15Ohm	±10.8V~16.5V	300ns/300ns	-40°C~85°C	Active	ROHS3
ADG508FBNZ	Analog Devices	8:1	270Ohm	8.1Ohm	±15V	230ns/130ns	-40°C~85°C	Active	ROHS3
ADG608BNZ	Analog Devices	8:1	30Ohm	5Ohm	±5V	75ns/45ns	-40°C~85°C	Active	ROHS3
DG508ACJ+	Analog Devices/Maxim	8:1	450Ohm	27Ohm	±4.5V~18V	1.5µs/1µs	0°C~70°C	Active	ROHS3
DG508ADJ+	Analog Devices/Maxim	8:1	450Ohm	27Ohm	±4.5V~18V	1.5µs/1µs	-40°C~85°C	Active	ROHS3
DG508BEJ-E3	Vishay Siliconix	8:1	380Ohm	10Ohm	±5V~20V	250ns/240ns	-40°C~125°C	Active	ROHS3
MAX328CPE+	Analog Devices/Maxim	8:1	4.6kOhm	70Ohm	±5V~18V	1.5µs/1µs	0°C~70°C	Active	ROHS3
MAX328EPE+	Analog Devices/Maxim	8:1	4.6kOhm	70Ohm	±5V~18V	1.5µs/1µs	-40°C~85°C	Active	ROHS3
MAX338CPE+	Analog Devices/Maxim	8:1	400Ohm	4Ohm	±4.5V~20V	500ns/500ns	0°C~70°C	Active	ROHS3
MAX338EPE+	Analog Devices/Maxim	8:1	400Ohm	4Ohm	±4.5V~20V	500ns/500ns	-40°C~85°C	Active	ROHS3

Engineering Selection Recommendations

Direct Resistance Match (400Ohm): MAX338CPE+ and MAX338EPE+ provide on-state resistance matching the DG508ACJ at 400Ohm. Both are active products with ROHS3 compliance. MAX338EPE+ extends the operating temperature range to -40°C~85°C, suitable for industrial applications. MAX338CPE+ maintains the original 0°C~70°C range. Both feature superior channel-to-channel matching (4Ohm vs. 24Ohm) and faster switching times (500ns vs. 1.5µs).

Near-Resistance Match (380Ohm to 450Ohm): DG508BEJ-E3 (380Ohm) and DG508ADJ+ (450Ohm) provide close resistance characteristics. DG508BEJ-E3 offers the widest operating temperature range (-40°C~125°C) and includes -3dB bandwidth specification (250MHz). DG508ADJ+ maintains timing characteristics identical to the original part (1.5µs/1µs) with extended temperature range.

Lower Resistance Variants (30Ohm to 300Ohm): ADG508AKNZ (300Ohm), ADG508FBNZ (270Ohm), and ADG608BNZ (30Ohm) are suitable for applications requiring lower impedance paths. ADG608BNZ operates at lower supply voltages (±5V) with significantly faster switching (75ns/45ns). All three are active products with ROHS3 compliance and extended temperature ranges.

Higher Resistance Variant (4.6kOhm): MAX328CPE+ and MAX328EPE+ operate at 4.6kOhm, appropriate for high-impedance signal routing applications. MAX328EPE+ provides extended temperature range (-40°C~85°C).

Compliance Consideration: All substitute parts carry ROHS3 compliance status, addressing the non-compliant status of the obsolete DG508ACJ. Selection should prioritize active product status and compliance requirements for new designs.

Frequently Asked Questions (FAQ)

Q: Can MAX338CPE+ directly replace DG508ACJ in existing designs? A: MAX338CPE+ matches the 400Ohm on-state resistance and operates within compatible dual supply voltage ranges (±4.5V~20V vs. ±15V). The 16-DIP package is identical. However, faster switching times (500ns vs. 1.5µs) and superior channel matching (4Ohm vs. 24Ohm) may require circuit validation. Both operate at 0°C~70°C.

Q: What is the difference between DG508ADJ+ and DG508ACJ+? A: Both feature 450Ohm on-state resistance and identical switching characteristics (1.5µs/1µs). DG508ADJ+ extends the operating temperature range to -40°C~85°C, while DG508ACJ+ maintains 0°C~70°C. Both are active products with ROHS3 compliance and ±4.5V~18V dual supply capability.

Q: Which substitute offers the best channel-to-channel matching? A: MAX338CPE+ and MAX338EPE+ provide the tightest matching at 4Ohm (ΔRon), compared to the original 24Ohm specification. This superior matching reduces crosstalk and improves signal integrity in precision applications.

Q: Is ADG608BNZ suitable for ±15V supply applications? A: No. ADG608BNZ operates at ±5V dual supply, not ±15V. It is designed for lower-voltage applications. For ±15V operation, select ADG508FBNZ (±15V) or DG508BEJ-E3 (±5V~20V).

Q: What is the advantage of DG508BEJ-E3 over other substitutes? A: DG508BEJ-E3 provides the widest operating temperature range (-40°C~125°C), specified -3dB bandwidth (250MHz), and low charge injection (2pC). It is suitable for high-temperature and high-frequency applications. On-state resistance is 380Ohm, slightly lower than the original 400Ohm.

Q: Are all substitute parts available in 16-DIP package? A: Yes. All listed substitute parts are packaged in 16-DIP (0.300", 7.62mm) through-hole configuration, maintaining mechanical compatibility with DG508ACJ footprints.

Q: Which substitute has the lowest leakage current? A: MAX328CPE+ and MAX328EPE+ specify 10pA leakage current, significantly lower than the original 1nA specification. This is beneficial for precision analog applications requiring minimal signal degradation.

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