Part A
AD8170ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4615 PCS
- Package
- SOIC-8
- Series
- Interface - Specialized
Replacement verdict
Compatible functional replacement candidate
The AD8174ARZ and AD8170ARZ are functionally comparable analog multiplexer/amplifier ICs from the same manufacturer family, sharing a common SOIC-14 footprint and similar supply and signal-path characteristics. The AD8174ARZ offers a higher channel count, making it a viable functional replacement candidate for the AD8170ARZ in many designs, provided the additional channels and any associated pin-configuration differences are validated against the target application.
Channel Count
High match
Package Type
High match
Supply Voltage Range
High match
Pin Configuration
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8174ARZ | AD8170ARZ | Why it matters |
|---|---|---|---|
| Number of Channels | 4 | 2 | Determines how many independent signal paths the multiplexer can switch; a 4-channel part cannot directly replace a 2-channel part in multi-source routing designs. |
| Configuration (Mux Type) | 4:1 multiplexer | 2:1 multiplexer | Defines the input-to-output selection ratio; the two parts serve different switching topologies and are not functionally interchangeable. |
| Package / Pin Count | 14-lead SOIC | 8-lead SOIC | Different footprints and pinouts prevent drop-in board replacement; PCB layout must be redesigned when swapping these parts. |
| -3 dB Bandwidth | 250 MHz | 250 MHz | Sets the maximum signal frequency the mux can pass with acceptable attenuation; matching bandwidth means similar high-speed signal handling. |
| Slew Rate | 700 V/µs | 700 V/µs | Governs how fast the output can track large signal transitions; identical slew rate indicates comparable large-signal dynamic performance. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V to ±15 V (dual) | Determines compatibility with the system power rails; matching ranges allow use in the same supply environment. |
| Output Current (per amplifier) | 50 mA | 50 mA | Indicates drive capability for loads such as cables or ADCs; equal drive strength supports similar load handling. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental envelope for reliable operation; identical ratings mean both suit the same industrial temperature conditions. |
| On Resistance / Channel Switch | Low (buffered current-mode mux) | Low (buffered current-mode mux) | Affects signal integrity and insertion loss; both use buffered architectures, but channel count differences change overall routing behavior. |
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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 | AD8170ARZ | AD8174ARZ |
|---|---|---|
| Part Status | Active | Active |
| Applications | Multiplexer with Amplifier | Multiplexer with Amplifier |
| Voltage - Supply | ±4V ~ 6V | ±4V ~ 6V |
Frequently asked questions
What are the primary differences between the AD8174ARZ and AD8170ARZ?
The AD8174ARZ is a 4:1 multiplexer with an integrated output amplifier, while the AD8170ARZ is a 2:1 multiplexer with an integrated output amplifier. Both are members of the same high-speed analog multiplexer family from Analog Devices and are offered in a 14-lead SOIC package, but they differ in the number of input channels and associated control logic.
Are the AD8174ARZ and AD8170ARZ pin-compatible?
No. The AD8174ARZ (4:1 mux) and AD8170ARZ (2:1 mux) have different pin functions and control-logic assignments despite sharing the same 14-lead SOIC package outline. The AD8174ARZ requires two channel-select lines for four inputs, whereas the AD8170ARZ uses a single select line for two inputs, so the pinouts are not interchangeable.
What is the typical -3 dB bandwidth of these multiplexers?
Both the AD8174ARZ and AD8170ARZ are specified with a typical -3 dB bandwidth of 250 MHz (gain = +1) in the Analog Devices datasheet. This makes them suitable for high-speed video, RGB switching, and other wideband signal-routing applications.
What supply voltage do the AD8174ARZ and AD8170ARZ require?
Both devices operate from a dual supply of ±5 V (nominal), with a specified operating range of ±4.5 V to ±5.5 V. They can also be operated from a single +5 V supply in applications where the signal swing permits, per the manufacturer datasheet.
Can the AD8174ARZ and AD8170ARZ drive a 75-ohm video load?
Yes. Both the AD8174ARZ and AD8170ARZ feature an integrated output amplifier capable of driving a 75-ohm back-terminated video load, which is a primary intended application for these parts. The output amplifier is designed to deliver the current required for standard video cable driving.
Do the AD8174ARZ and AD8170ARZ include disable or high-impedance output modes?
Yes. Both devices provide an output disable function that places the output amplifier in a high-impedance state, allowing multiple multiplexer outputs to be tied together for larger switching matrices. The disable control is accessed via a dedicated logic pin on each device.
What logic levels do the control inputs of the AD8174ARZ and AD8170ARZ accept?
The channel-select and disable inputs on both the AD8174ARZ and AD8170ARZ are TTL/CMOS-compatible, allowing direct interfacing with standard digital logic. Refer to the Analog Devices datasheet for the exact VIH and VIL thresholds over the full operating temperature range.
Which part should be selected for a 4-channel input switching application?
The AD8174ARZ should be selected when four input channels must be routed to a single output, since it is a 4:1 multiplexer. The AD8170ARZ, being a 2:1 multiplexer, is appropriate only for two-input selection. Choosing the AD8170ARZ for a four-input requirement would necessitate external cascading, which the AD8174ARZ avoids.