Part A
ADG609BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4189 PCS
- Package
- SOIC-16
- Series
- Interface - Conmutadores analógicos, Multiplexers, Demultiplexeres
Replacement verdict
Compatible functional replacement candidate
The ADG608BRZ and ADG609BRZ share the same 16-lead SOIC package, ±5 V dual-supply operating range, and CMOS analog switch architecture, making them functionally interchangeable in many designs. The primary distinction is channel configuration: the ADG608BRZ provides an 8-to-1 multiplexer while the ADG609BRZ provides a dual 4-to-1 multiplexer, so the replacement is valid only where the system logic can accommodate the differing switch topology.
Package Type
High match
Supply Voltage Range
High match
Channel Configuration
Validation required
On-Resistance
High match
Parts at a glance
Part B
ADG608BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4811 PCS
- Package
- SOIC-16
- Series
- Interface - Conmutadores analógicos, Multiplexers, Demultiplexeres
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG608BRZ | ADG609BRZ | Why it matters |
|---|---|---|---|
| Number of Channels | 8:1 (single 8-to-1 multiplexer) | 4:1 (dual 4-to-1 multiplexer) | Defines the switching topology; an 8:1 mux cannot directly replace a dual 4:1 mux in circuits requiring two independent selection paths. |
| Configuration | Single 8-channel multiplexer | Dual 4-channel multiplexer | Determines how many independent signal paths can be routed, affecting board layout and channel count requirements. |
| On-Resistance (RON) | ~30 Ω (typical at ±5 V) | ~30 Ω (typical at ±5 V) | Lower on-resistance reduces signal attenuation and voltage drop; matching values support similar analog signal integrity. |
| Supply Voltage Range | ±5 V dual supply (or +5 V single) | ±5 V dual supply (or +5 V single) | Must match the system power rails; identical ranges allow use in the same supply environment. |
| Package | 16-lead SOIC (R-16) | 16-lead SOIC (R-16) | Same footprint enables drop-in PCB compatibility without layout changes. |
| Switching Time (tON/tOFF) | ~65 ns / ~40 ns (typical) | ~65 ns / ~40 ns (typical) | Determines maximum switching frequency and settling behavior in multiplexed signal chains. |
| Channel-to-Channel Crosstalk | ~-85 dB (typical at 1 MHz) | ~-85 dB (typical at 1 MHz) | Low crosstalk preserves signal fidelity between adjacent channels in precision analog routing. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms suitability for industrial and commercial environments with identical thermal limits. |
| Logic Control Inputs | 3 address lines (A0, A1, A2) + EN | 2 address lines (A0, A1) + EN per mux | Different control-line counts affect microcontroller GPIO allocation and firmware addressing logic. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG609BRZ | ADG608BRZ |
|---|---|---|
| Part Status | Active | Active |
| Switch Circuit | SP4T | - |
| Multiplexer / Demultiplexer Circuit | 4:1 | 8:1 |
| Number of Circuits | 2 | 1 |
| On - State Resistance(Max) | 30Ohm | 30Ohm |
| Channel - to - Channel Matching(ΔRon) | 5Ohm (Max) | 5Ohm (Max) |
| Voltage - Supply, Single (V+) | 3.3V ~ 5V | 3.3V ~ 5V |
| Voltage - Supply, Dual (V±) | ±5V | ±5V |
| Switch Time(Ton Toff)(Max) | 75ns, 45ns | 75ns, 45ns |
| Charge Injection | 6pC | 6pC |
| Channel Capacitance(CS(off)CD(off)) | 9pF, 20pF | 9pF, 40pF |
| Current - Leakage(IS(off))(Max) | 500pA | 500pA |
| Crosstalk | -85dB @ 100kHz | -85dB @ 100kHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary difference between the ADG608BRZ and ADG609BRZ?
The ADG608BRZ is an 8-channel analog multiplexer that connects one of eight inputs to a common output, while the ADG609BRZ is a 4-channel differential multiplexer that switches one of four differential input pairs to a common differential output. Both are CMOS devices in a 16-lead SOIC package.
Are the ADG608BRZ and ADG609BRZ pin-compatible?
No. Although both are housed in a 16-lead SOIC (R-16) package, their pin functions differ because the ADG608BRZ is configured as an 8-to-1 single-ended mux and the ADG609BRZ as a 4-to-1 differential mux. The PCB layout and signal routing must be designed for the specific function of each part.
What are the key analog signal specifications common to both devices?
Both the ADG608BRZ and ADG609BRZ operate from dual supplies of ±5 V or a single supply of +5 V to +12 V, feature low on-resistance (typically 30 Ω at ±5 V), fast switching times (tON/tOFF typically 65 ns/40 ns), and low charge injection. These parameters are specified in the Analog Devices datasheet for the ADG608/ADG609 family.
Can the ADG608BRZ and ADG609BRZ be used in multiplexing differential signals?
The ADG609BRZ is specifically designed for differential signal multiplexing, routing one of four differential pairs. The ADG608BRZ is a single-ended 8-to-1 multiplexer; to handle differential signals with it, two ADG608BRZ devices would be required, one for each leg of the differential pair.
What digital control interface do these multiplexers use?
Both devices use standard CMOS/TTL-compatible digital inputs. The ADG608BRZ uses a 3-bit binary address (A0, A1, A2) plus an enable input to select one of eight channels, while the ADG609BRZ uses a 2-bit address (A0, A1) plus an enable input to select one of four differential channel pairs.
What are the operating temperature ranges for the ADG608BRZ and ADG609BRZ?
Both the ADG608BRZ and ADG609BRZ are specified for the industrial temperature range of −40 °C to +85 °C, as stated in the Analog Devices datasheet for the ADG608/ADG609 family.
Are these parts suitable for low-power portable applications?
Yes. Both the ADG608BRZ and ADG609BRZ feature low power dissipation (typically less than 0.1 µW) and low leakage currents, making them suitable for battery-powered and portable instrumentation where power consumption is critical. These specifications are documented in the manufacturer datasheet.