DG509ACJ Equivalent & Substitute Parts

Part Overview

The DG509ACJ is a 2-circuit SP4T (single-pole, 4-throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This 16-DIP through-hole component features 450Ω on-state resistance and operates across dual supply voltages of ±4.5V to ±18V. The DG509ACJ is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility through matching switch topology, circuit count, package type, and critical electrical parameters.

Key Parameters

Parameter	DG509ACJ
Switch Circuit	SP4T
Multiplexer/Demultiplexer Circuit	4:1
Number of Circuits	2
On-State Resistance (Max)	450Ω
Channel-to-Channel Matching (ΔRon)	27Ω
Voltage - Supply, Dual (V±)	±4.5V ~ 18V
Switch Time (Ton, Toff) (Max)	1.5µs, 1µs
Channel Capacitance (CS(off), CD(off))	5pF, 12pF
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	0°C ~ 70°C
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the DG509ACJ is determined by strict adherence to the following criteria:

Primary Substitution Requirements:

Switch topology: SP4T (single-pole, 4-throw)
Circuit configuration: 4:1 multiplexer/demultiplexer
Number of circuits: 2
Package type: 16-DIP through-hole
Physical dimensions: 0.300" (7.62mm) pitch

Electrical Compatibility Parameters:

On-state resistance within acceptable range for the application
Dual supply voltage range compatibility with ±4.5V ~ 18V
Switch timing characteristics (Ton, Toff)
Channel capacitance specifications
Leakage current performance

Compliance Considerations:

RoHS status (obsolete part is non-compliant; active substitutes are ROHS3 compliant)
REACH and ECCN classifications

Substitute parts are grouped based on whether they meet all primary requirements while maintaining electrical parameter compatibility within the specified operating conditions.

Parameter Comparison

Parameter	DG509ACJ	DG509ACJ+	ADG509AKNZ	DG509BEJ-E3	MPC509AP	HI3-0509A-5Z
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Vishay Siliconix	Texas Instruments	Renesas Electronics Corporation
Product Status	Obsolete	Active	Active	Active	Active	Active
Switch Circuit	SP4T	SP4T	SP4T	SP4T	SP4T	SP4T
Multiplexer/Demultiplexer Circuit	4:1	4:1	4:1	4:1	4:1	4:1
Number of Circuits	2	2	2	2	2	2
On-State Resistance (Max)	450Ω	450Ω	450Ω	380Ω	1.5kΩ	1.8kΩ
Channel-to-Channel Matching (ΔRon)	27Ω	27Ω	22.5Ω	10Ω	—	—
Voltage - Supply, Dual (V±)	±4.5V ~ 18V	±4.5V ~ 18V	±10.8V ~ 16.5V	±5V ~ 20V	±5V ~ 22V	±15V
Switch Time (Ton, Toff) (Max)	1.5µs, 1µs	1.5µs, 1µs	300ns, 300ns	250ns, 240ns	200ns, 250ns (Typ)	300ns, 300ns (Typ)
Channel Capacitance (CS(off), CD(off))	5pF, 12pF	5pF, 12pF	5pF, 11pF	3pF, 8pF	5pF, 12pF	10pF, 12pF
Current - Leakage (IS(off)) (Max)	1nA	1nA	1nA	1nA	500pA (Typ)	30pA (Typ)
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	0°C ~ 75°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): DG509ACJ+ is the primary substitute for the obsolete DG509ACJ. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and share identical electrical specifications: 450Ω on-state resistance, 27Ω channel-to-channel matching, ±4.5V ~ 18V dual supply range, and 1.5µs/1µs switch timing. The DG509ACJ+ is active and ROHS3 compliant, making it suitable for new designs and production continuity.

Manufacturer-Recommended Alternatives: ADG509AKNZ (Analog Devices Inc.) and DG509BEJ-E3 (Vishay Siliconix) are manufacturer-recommended substitutes. Both maintain the SP4T 4:1 topology and 2-circuit configuration in 16-DIP packaging. ADG509AKNZ offers improved channel-to-channel matching (22.5Ω) and faster switching (300ns), but operates within a narrower supply range (±10.8V ~ 16.5V). DG509BEJ-E3 provides the lowest on-state resistance (380Ω), superior channel matching (10Ω), and extended temperature range (-40°C ~ 125°C), with the trade-off of a narrower dual supply range (±5V ~ 20V).

Alternative Substitutes (Application-Dependent): MPC509AP (Texas Instruments) and HI3-0509A-5Z (Renesas Electronics Corporation) are functional substitutes with higher on-state resistance (1.5kΩ and 1.8kΩ respectively). These parts are suitable only for applications where higher on-state resistance is acceptable. MPC509AP operates across ±5V ~ 22V and HI3-0509A-5Z across ±15V fixed supply. Both are ROHS3 compliant and active.

Compliance Status: All substitute parts are ROHS3 compliant and active, addressing the obsolescence and non-compliance status of the original DG509ACJ. Selection should prioritize supply voltage compatibility with the target application and acceptable on-state resistance range.

Frequently Asked Questions (FAQ)

Q: Can DG509ACJ+ be used as a direct replacement for DG509ACJ? A: Yes. DG509ACJ+ is the direct equivalent, manufactured by the same company with identical electrical specifications. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Pinout and package are identical.

Q: What is the key difference between DG509ACJ+ and ADG509AKNZ? A: Both are Analog Devices products with 450Ω on-state resistance and SP4T 4:1 topology. ADG509AKNZ offers faster switching (300ns vs. 1.5µs) and tighter channel matching (22.5Ω vs. 27Ω), but operates within a narrower supply range (±10.8V ~ 16.5V vs. ±4.5V ~ 18V). Selection depends on supply voltage availability and switching speed requirements.

Q: Why do MPC509AP and HI3-0509A-5Z have higher on-state resistance? A: These parts are from different manufacturers (Texas Instruments and Renesas) and represent alternative switch IC designs. Higher on-state resistance (1.5kΩ and 1.8kΩ) may be acceptable in applications with lower signal current requirements or where impedance matching is not critical. They are suitable only if the application tolerates this parameter difference.

Q: Are all substitute parts available in the same 16-DIP package? A: Yes. All listed substitutes use 16-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical and pinout compatibility for direct board-level replacement.

Q: Which substitute offers the best performance across all parameters? A: DG509BEJ-E3 (Vishay Siliconix) provides the lowest on-state resistance (380Ω), tightest channel matching (10Ω), fastest switching (250ns/240ns), and widest operating temperature range (-40°C ~ 125°C). However, it operates within a narrower dual supply range (±5V ~ 20V). Selection should align with specific application requirements.

Q: Is RoHS compliance mandatory for substitution? A: The original DG509ACJ is RoHS non-compliant. All active substitutes are ROHS3 compliant. For new designs and regulated applications, ROHS3 compliance is required. For legacy system maintenance, non-compliant parts may still be sourced if necessary.

Q: Can I use these parts interchangeably in my design? A: Interchangeability depends on your application's tolerance for on-state resistance, supply voltage range, and switching speed. DG509ACJ+ is the only true drop-in replacement. Other substitutes require verification that their electrical parameters meet your circuit requirements.

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