Part A
ADG433BR
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4183 ПКС
- Series
- Интерфейс - аналоговые выключатели, мультиплексоры, демультиплексоры
Replacement verdict
Compatible functional replacement candidate
The ADG431BRZ and ADG433BR are both quad SPST CMOS analog switches from Analog Devices sharing the same 16-lead SOIC footprint and ±15 V dual-supply architecture, making them strong functional replacement candidates. The ADG433BR offers break-before-make switching and a slightly higher on-resistance, so designers should confirm timing and signal-path requirements before substituting in existing layouts.
Switch Configuration
High match
Package Type
High match
On-Resistance
Validation required
Switching Timing
Validation required
Parts at a glance
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG431BRZ | ADG433BR | Why it matters |
|---|---|---|---|
| Switch Configuration | 4 x SPST (NC) | 4 x SPST (2 NC, 2 NO) | Determines the default contact state (normally closed vs. normally open), which affects circuit behavior at power-up and logic polarity. |
| Number of Channels | 4 | 4 | Channel count must match the signal routing requirements of the target design. |
| On-Resistance (RON) | 17 Ω (typ) | 17 Ω (typ) | Lower on-resistance reduces signal attenuation and voltage drop across the switch in analog signal paths. |
| Supply Voltage Range | ±4.5 V to ±20 V dual, or 4.5 V to 40 V single | ±4.5 V to ±20 V dual, or 4.5 V to 40 V single | The supply range must accommodate the system rail voltages for proper switch operation and signal headroom. |
| Logic Input Compatibility | TTL/CMOS compatible | TTL/CMOS compatible | Ensures the digital control inputs can be driven directly by standard logic families without level shifting. |
| Switching Time (tON/tOFF) | 110 ns / 90 ns (typ) | 110 ns / 90 ns (typ) | Switching speed affects how quickly signals can be routed and limits the maximum usable signal frequency. |
| Package | 16-Lead SOIC (Narrow) | 16-Lead SOIC (Narrow) | Package footprint and pinout must match the PCB layout for a drop-in replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment to guarantee reliable operation. |
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 | ADG433BR | ADG431BRZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | ADG433 | - |
| Switch Circuit | SPST - NO/NC | SPST - NC |
| Multiplexer / Demultiplexer Circuit | 1:1 | 1:1 |
| Number of Circuits | 4 | 4 |
| On - State Resistance (Max) | 24Ohm | - |
| Channel - to - Channel Matching (ΔRon) | 1.2Ohm | - |
| Voltage - Supply, Single (V+) | 12V | 12V |
| Voltage - Supply, Dual (V±) | ±15V | ±15V |
| Switch Time (Ton, Toff) (Max) | 90ns, 60ns | - |
| Charge Injection | 5pC | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 9pF, 9pF | - |
| Current - Leakage (IS(off)) (Max) | 250pA | - |
| Crosstalk | -85dB @ 1MHz | -85dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tube | - |
| On - State Resistance(Max) | - | 24Ohm |
| Channel - to - Channel Matching(ΔRon) | - | 1.2Ohm |
| Switch Time(Ton Toff)(Max) | - | 90ns, 60ns |
| Channel Capacitance(CS(off)CD(off)) | - | 9pF, 9pF |
| Current - Leakage(IS(off))(Max) | - | 250pA |
Frequently asked questions
What are the key differences between the ADG431BRZ and ADG433BR analog switches?
The ADG431BRZ is a quad single-pole single-throw (SPST) normally closed (NC) analog switch, while the ADG433BR is a quad single-pole single-throw (SPST) switch configured as two normally open (NO) and two normally closed (NC) switches. Both are members of the Analog Devices ADG431/ADG432/ADG433 family, fabricated on a complementary metal-oxide semiconductor (CMOS) process, and feature low on-resistance and fast switching. The primary distinction is the switch configuration: ADG431BRZ provides four NC switches, whereas ADG433BR provides a mixed NO/NC configuration.
Are the ADG431BRZ and ADG433BR pin-compatible and can they be used as drop-in replacements for each other?
No. Although both devices are offered in the same 16-lead SOIC (R) package, their pin functions differ because the switch configurations are different. The ADG431BRZ has four normally closed switches, while the ADG433BR has two normally open and two normally closed switches. The logic control inputs and switch terminal assignments are not identical, so a direct drop-in replacement is not possible without verifying pin functions and redesigning the circuit as required.
What are the on-resistance and switching time specifications for the ADG431BRZ and ADG433BR?
Both devices are specified with low on-resistance, typically around 35 Ω or less at room temperature, and fast switching times in the range of tens of nanoseconds (turn-on and turn-off times on the order of 100 ns or less, depending on supply voltage and load conditions). For exact guaranteed limits, refer to the respective Analog Devices datasheets, as the parameters are specified over the full operating temperature range and supply voltage conditions.
What supply voltage range do the ADG431BRZ and ADG433BR support?
Both devices operate from dual supplies of ±4.5 V to ±20 V or a single supply of +4.5 V to +40 V, making them suitable for a wide range of signal switching applications. The digital control inputs are compatible with standard CMOS and TTL logic levels, allowing direct interfacing with common logic families.
What are the typical applications for the ADG431BRZ and ADG433BR?
These analog switches are commonly used in signal routing, data acquisition systems, sample-and-hold circuits, audio and video signal switching, communication systems, and battery-powered instrumentation. The ADG431BRZ (four NC switches) is suited to applications requiring normally closed signal paths, while the ADG433BR (mixed NO/NC) is useful where a combination of normally open and normally closed switching is needed in a single package.
What package options are available for the ADG431BRZ and ADG433BR?
Both the ADG431BRZ and ADG433BR are available in a 16-lead SOIC package (the "R" suffix in the part number denotes the SOIC package). The "Z" suffix on the ADG431BRZ indicates RoHS-compliant, lead-free construction. Designers should confirm the exact package and ordering code against the manufacturer's datasheet and product page before finalizing a bill of materials.
Do the ADG431BRZ and ADG433BR have identical electrical performance aside from switch configuration?
Both devices share the same CMOS process and similar electrical characteristics, including low on-resistance, low leakage current, and fast switching. However, because the switch configurations differ (four NC versus two NO plus two NC), parameters such as charge injection and off-isolation may vary slightly between the two parts. Always consult the individual datasheets for guaranteed specifications rather than assuming identical performance.