Part A
AD8174AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4516 PCS
- Series
- Interface - Specialized
Replacement verdict
Compatible functional replacement candidate
The AD8170ARZ and AD8174AR are both analog multiplexers from Analog Devices in the same SOIC-8 package, sharing a 2:1 multiplexer topology and similar supply requirements, making the AD8174AR a viable functional replacement candidate for the AD8170ARZ in many designs. However, the AD8174AR offers four channels versus two on the AD8170ARZ, and the two devices differ in bandwidth and switching characteristics, so designers should validate dynamic performance and channel-count requirements before substituting.
Channel Count
High match
Package Type
High match
Bandwidth
Validation required
Supply Voltage Range
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 | AD8170ARZ | AD8174AR | Why it matters |
|---|---|---|---|
| Number of Channels | 2 (1x2 multiplexer) | 4 (1x4 multiplexer) | Determines how many input signals can be routed to the output; a 4-channel mux supports more sources than a 2-channel mux. |
| Configuration | 2:1 multiplexer | 4:1 multiplexer | Defines the switching topology; the two parts are not directly substitutable when the application requires a specific input count. |
| -3 dB Bandwidth | 250 MHz | 250 MHz | Sets the maximum signal frequency the mux can pass with acceptable attenuation; both parts offer comparable high-speed performance. |
| Slew Rate | 1000 V/µs | 1000 V/µs | Indicates how fast the output can respond to large signal swings; identical slew rates mean similar transient behavior. |
| Supply Voltage Range | ±4 V to ±15 V (dual) | ±4 V to ±15 V (dual) | Determines compatibility with the system power rails; matching ranges allow use in the same supply environment. |
| Package | 8-Lead SOIC | 14-Lead SOIC | Affects PCB footprint and pin count; different packages require layout changes and are not drop-in replacements. |
| On Resistance | Low (internal switch) | Low (internal switch) | Lower on-resistance reduces signal loss and distortion through the multiplexer switch. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts are rated for industrial temperature environments, supporting use in similar applications. |
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 | AD8174AR | AD8170ARZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | AD8174 | - |
| Applications | Multiplexer with Amplifier | Multiplexer with Amplifier |
| Voltage - Supply | ±4V ~ 6V | ±4V ~ 6V |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
What are the primary differences between the AD8170ARZ and the AD8174AR?
The AD8170ARZ is a single 2:1 multiplexer amplifier in an 8-lead SOIC package, while the AD8174AR is a quad 2:1 multiplexer amplifier in a 14-lead SOIC package. The AD8170ARZ integrates one multiplexer channel with a current-feedback amplifier, whereas the AD8174AR provides four independent multiplexer channels, each with its own output amplifier, making it suitable for multi-channel signal routing applications.
Are the AD8170ARZ and AD8174AR pin-compatible or footprint-compatible?
No. The AD8170ARZ uses an 8-lead SOIC package, and the AD8174AR uses a 14-lead SOIC package. They have different pin counts, pin functions, and PCB land patterns, so they are not drop-in replacements for each other and require different board layouts.
What is the bandwidth performance of the AD8170ARZ and AD8174AR?
Both devices are based on the same high-speed current-feedback amplifier core. The AD8170ARZ offers a -3 dB bandwidth of approximately 250 MHz at a gain of +2, and the AD8174AR provides similar per-channel bandwidth performance of approximately 250 MHz at a gain of +2, as specified in the Analog Devices datasheets for each part.
Can the AD8170ARZ and AD8174AR operate from the same supply voltages?
Yes. Both devices operate from dual supplies of ±5 V to ±15 V or a single supply of +10 V to +30 V, as specified in their respective Analog Devices datasheets. This allows either part to be used in similar supply architectures, though the AD8174AR supports four channels versus one channel on the AD8170ARZ.
How do the channel counts affect the application suitability of the AD8170ARZ versus the AD8174AR?
The AD8170ARZ, with a single 2:1 multiplexer channel, is suited for single-channel signal selection such as video switching or routing one signal between two sources. The AD8174AR, with four independent 2:1 multiplexer channels, is intended for multi-channel applications such as RGB video switching, where multiple signals must be routed simultaneously with matched performance across channels.
Do the AD8170ARZ and AD8174AR share the same multiplexer switching architecture?
Yes. Both devices use a 2:1 multiplexer architecture with a current-feedback output amplifier per channel. The AD8170ARZ contains one such channel, and the AD8174AR contains four. The switching control logic and signal path topology are consistent across the two parts, as documented in the Analog Devices datasheets.
What are the package and temperature range specifications for the AD8170ARZ and AD8174AR?
The AD8170ARZ is supplied in an 8-lead SOIC package, and the AD8174AR is supplied in a 14-lead SOIC package. Both are specified for the industrial temperature range of -40°C to +85°C, per their Analog Devices datasheets.