Part A
ADG609BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3598 PCS
- Package
- TSSOP-16
- Series
- Interface - Conmutadores analógicos, Multiplexers, Demultiplexeres
Replacement verdict
Compatible functional replacement candidate
The ADG608BRUZ and ADG609BRUZ share the same TSSOP-16 package, ±5 V dual-supply operation, and CMOS analog switch architecture, making them strong functional replacement candidates. The primary distinction is channel configuration: the ADG608BRUZ provides an 8-to-1 multiplexer while the ADG609BRUZ provides a dual 4-to-1 multiplexer, so the replacement is valid only where the system architecture 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
ADG608BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2892 PCS
- Package
- TSSOP-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 | ADG608BRUZ | ADG609BRUZ | Why it matters |
|---|---|---|---|
| Number of Channels | 8:1 (1 channel) | 4:1 (2 channels) | Defines the multiplexer topology; an 8-to-1 single channel cannot directly replace a dual 4-to-1 configuration without redesigning the signal routing. |
| Switch Configuration | 8:1 Multiplexer | Dual 4:1 Multiplexer | Determines how many independent input signals can be routed and whether two separate signal paths are available simultaneously. |
| On-Resistance (Typical) | 30 Ω | 30 Ω | Affects signal attenuation and voltage drop across the switch; 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 the parts to operate in the same supply environment. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Same footprint and pin count enable drop-in board compatibility without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts are rated for the same industrial temperature environments. |
| Channel-to-Channel Matching | 5 Ω (typ) | 5 Ω (typ) | Low matching error preserves differential signal accuracy and consistent gain across channels. |
| Switching Time (tON/tOFF) | 65 ns / 40 ns (typ) | 65 ns / 40 ns (typ) | Determines maximum multiplexing rate and settling behavior in sampled or time-multiplexed systems. |
| Logic Control Interface | 3-bit binary address + EN | 2-bit binary address (per channel) + EN | Address line count differs, so the controlling firmware or GPIO allocation must be adapted when substituting. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADG609BRUZ | ADG608BRUZ |
|---|---|---|
| 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 ADG608BRUZ and ADG609BRUZ?
The ADG608BRUZ is an 8-channel multiplexer that connects one of eight inputs to a common output, while the ADG609BRUZ is a 4-channel differential multiplexer that switches one of four differential input pairs to a common differential output. Both are CMOS analog multiplexers in a 16-lead TSSOP package.
Are the ADG608BRUZ and ADG609BRUZ pin-compatible?
No. Although both devices are housed in a 16-lead TSSOP (RU-16) package, their pin functions differ because the ADG608BRUZ provides eight single-ended channels and the ADG609BRUZ provides four differential channel pairs. The pin assignments are not interchangeable, so a direct drop-in replacement is not possible without PCB redesign.
What are the key analog switch specifications common to both devices?
Both the ADG608BRUZ and ADG609BRUZ are fabricated on a CMOS process and feature low on-resistance, low leakage currents, and TTL/CMOS-compatible logic inputs. They operate from dual supplies (typically ±5 V) or a single supply, and both offer break-before-make switching action to prevent momentary shorting between channels.
Can the ADG608BRUZ and ADG609BRUZ operate with a single power supply?
Yes. Both devices are specified for single-supply operation as well as dual-supply operation. The analog signal range and on-resistance characteristics depend on the applied supply voltage, so the datasheet specifications for the chosen supply configuration should be consulted before use.
Which device should be selected for differential signal routing?
The ADG609BRUZ should be selected for differential signal routing because it is configured as a 4-channel differential multiplexer, switching one of four differential input pairs. The ADG608BRUZ is intended for single-ended 8-to-1 multiplexing and is not configured for differential pairs.
Do both devices use the same digital control interface?
Both devices use standard CMOS/TTL-compatible logic control inputs to select channels, but the number of address lines differs because the ADG608BRUZ selects among eight channels (three address bits) while the ADG609BRUZ selects among four differential channels (two address bits). The specific truth tables and enable logic should be verified against the respective manufacturer datasheets.
Are the ADG608BRUZ and ADG609BRUZ RoHS compliant?
Yes. The "Z" suffix in both part numbers indicates a lead-free, RoHS-compliant package finish per Analog Devices' ordering nomenclature. Designers should confirm the current compliance status on the official Analog Devices product page or an authorized distributor listing before finalizing a design.