Part A
ADG436BRZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1589 PCS
- Series
- Interface - Conmutadores analógicos, Multiplexers, Demultiplexeres
Replacement verdict
Compatible functional replacement candidate
The ADG436BRZ-REEL and ADG433BR are both dual SPDT CMOS analog switches from Analog Devices in the same SOIC-16 package, sharing comparable on-resistance and supply requirements, so the ADG436BRZ-REEL can serve as a functional substitute for the ADG433BR in many designs. However, the ADG436 offers a wider single-supply operating range and faster switching, while the ADG433 provides break-before-make switching and a different logic threshold, so the designer must validate supply rails, switching timing, and control-logic compatibility before committing to the replacement.
Switch Configuration
High match
Package Type
High match
Supply Voltage Range
Validation required
Switching Timing
Validation required
Parts at a glance
Part B
ADG433BR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4183 PCS
- 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 | ADG436BRZ-REEL | ADG433BR | Why it matters |
|---|---|---|---|
| Switch Configuration | 2 x SPDT (dual single-pole double-throw) | 4 x SPST (quad single-pole single-throw) | Determines the switching topology; SPDT allows routing one input to two outputs, while SPST only opens/closes a single path, so they are not directly interchangeable in circuit function. |
| Number of Switches | 2 | 4 | The channel count affects how many independent signals can be controlled, impacting board layout and channel density. |
| On-Resistance (R_ON) | 45 Ω (typ) | 45 Ω (typ) | On-resistance affects signal attenuation and voltage drop across the switch; similar values indicate comparable signal integrity performance. |
| 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 | Defines the operating voltage window; matching ranges allow use in the same power supply architecture. |
| Package | 16-lead SOIC (R-16) | 16-lead SOIC (R-16) | Package footprint and pinout must match for physical board compatibility and drop-in replacement. |
| Switching Time (t_ON / t_OFF) | t_ON 90 ns, t_OFF 60 ns (typ) | t_ON 90 ns, t_OFF 60 ns (typ) | Switching speed determines how fast the signal path can be reconfigured; comparable timing supports similar dynamic performance. |
| Charge Injection | 10 pC (typ) | 10 pC (typ) | Charge injection causes glitches on the switched signal; low and matching values are important for precision analog sampling. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for 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 | ADG436BRZ-REEL | ADG433BR |
|---|---|---|
| Part Status | Active | Obsolete |
| Base Product Number | ADG436 | ADG433 |
| Switch Circuit | SPDT | SPST - NO/NC |
| Multiplexer / Demultiplexer Circuit | 2:1 | 1:1 |
| Number of Circuits | 2 | 4 |
| On - State Resistance (Max) | 12Ohm (Typ) | 24Ohm |
| Channel - to - Channel Matching (ΔRon) | 1Ohm | 1.2Ohm |
| Voltage - Supply, Single (V+) | 3V ~ 30V | 12V |
| Voltage - Supply, Dual (V±) | ±3V ~ 20V | ±15V |
| Switch Time (Ton, Toff) (Max) | 70ns, 60ns (Typ) | 90ns, 60ns |
| Charge Injection | 10pC | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 13pF | 9pF, 9pF |
| Current - Leakage (IS(off)) (Max) | 250pA | 250pA |
| Crosstalk | -90dB @ 1MHz | -85dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | Tube |
Frequently asked questions
What are the key differences between the ADG436BRZ-REEL and the ADG433BR?
The ADG436BRZ-REEL is a dual SPDT (single-pole double-throw) analog switch supplied in a 16-lead SOIC package and provided on tape and reel for automated assembly. The ADG433BR is a quad SPST (single-pole single-throw) analog switch supplied in an 18-lead SOIC package. They differ in switch configuration, channel count, and package pin count, so they are not pin-compatible substitutes.
Are the ADG436BRZ-REEL and ADG433BR pin-to-pin compatible?
No. The ADG436BRZ-REEL uses a 16-lead SOIC package, while the ADG433BR uses an 18-lead SOIC package. The different lead counts and pinouts mean they cannot be interchanged on the same PCB land pattern without redesign.
What switch configuration does each part provide?
The ADG436BRZ-REEL provides two independent SPDT switches (dual SPDT). The ADG433BR provides four independent SPST switches (quad SPST). The choice depends on whether the design requires changeover (SPDT) or simple on/off (SPST) signal routing.
Do both parts operate from the same supply voltage range?
Both devices are designed for dual-supply operation with typical ranges of ±4.5 V to ±20 V, and they also support single-supply operation. Designers should confirm the exact limits in the respective manufacturer datasheets, since absolute maximum ratings and specified operating conditions must be observed for each part.
Why is the ADG436BRZ-REEL supplied in tape and reel?
The "-REEL" suffix indicates the ADG436BRZ is packaged on tape and reel, which is intended for high-volume automated pick-and-place assembly. The ADG433BR is a standard tube or bulk orderable part number; reel packaging for the ADG433 would be indicated by a separate orderable suffix.
Can the ADG433BR replace the ADG436BRZ-REEL in an existing design?
Not directly. Because the ADG433BR is a quad SPST device in an 18-lead package and the ADG436BRZ-REEL is a dual SPDT device in a 16-lead package, a replacement requires PCB redesign, revised pin mapping, and validation of switch function, on-resistance, and timing against the target circuit.
Are both parts suitable for analog signal switching in instrumentation designs?
Yes. Both are CMOS analog switches intended for routing analog signals in instrumentation, data acquisition, and communication systems. Selection depends on channel count and switch topology: the ADG436BRZ-REEL offers dual SPDT changeover, while the ADG433BR offers four independent SPST on/off switches.