Part A
AM26LS33ACDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1505 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26LS33ACDR and AM26LS32ACDG4 are functionally interchangeable quad differential line receivers sharing the same core architecture, supply voltage range, and operating temperature range, making the AM26LS32ACDG4 a viable candidate for designs currently using the AM26LS33ACDR. Designers should confirm input sensitivity thresholds and package footprint compatibility against their specific application requirements before committing to the substitution.
Function and Channel Count
High match
Supply Voltage Range
High match
Input Sensitivity
Validation required
Package and Footprint
Validation required
Parts at a glance
Part B
AM26LS32ACDG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 5692 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LS33ACDR | AM26LS32ACDG4 | Why it matters |
|---|---|---|---|
| Receiver Input Sensitivity | ±500 mV | ±200 mV | Determines the minimum differential voltage the receiver can detect; the AM26LS33A is more tolerant of attenuated signals, while the AM26LS32A offers higher sensitivity for low-amplitude differential buses. |
| Receiver Input Hysteresis | 50 mV (typ) | 50 mV (typ) | Hysteresis improves noise immunity by preventing output chatter on slow or noisy differential inputs; both devices share similar hysteresis, so noise margin behavior is comparable. |
| Receiver Input Voltage Range | -7 V to +7 V | -7 V to +7 V | Defines the common-mode range over which the receiver operates correctly; identical ranges mean both can tolerate the same ground-potential differences in RS-422/RS-485 links. |
| Number of Drivers / Receivers | 0 / 4 | 0 / 4 | Both are quad differential line receivers with no integrated drivers; the channel count must match the bus topology for direct substitution. |
| Supply Voltage (VCC) | 5 V (4.75 V to 5.25 V) | 5 V (4.75 V to 5.25 V) | Both require a nominal 5 V supply; matching rails ensures the parts are electrically interchangeable in existing 5 V systems. |
| Output Type | 3-State | 3-State | Tri-state outputs allow multiple receivers to share a common bus; both provide this capability, supporting bus multiplexing. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings mean both are suitable for the same environmental conditions without derating. |
| Package / Mounting | SOIC-16 (Surface Mount) | SOIC-16 (Surface Mount) | Same package and footprint allow drop-in board replacement without layout changes. |
| Propagation Delay | ~20 ns (typ) | ~20 ns (typ) | Similar propagation delay ensures comparable timing performance in high-speed differential data links. |
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 | AM26LS33ACDR | AM26LS32ACDG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Receiver | Receiver |
| Protocol | - | RS422, RS423 |
| Number of Drivers/Receivers | 0/4 | 0/4 |
| Receiver Hysteresis | 50 mV | 50 mV |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AM26LS33ACDR and AM26LS32ACDG4?
Both are quad differential line receivers from Texas Instruments in the AM26LS32/AM26LS33 family. The AM26LS33ACDR is supplied in an SOIC-16 package on tape and reel, while the AM26LS32ACDG4 is supplied in an SOIC-16 package in tube form. Both are designed to meet the requirements of TIA/EIA-422-B and TIA/EIA-423-B and are pin-compatible members of the same receiver family.
What is the main functional difference between the AM26LS33ACDR and the AM26LS32ACDG4?
The primary difference is the input sensitivity and fail-safe behavior. The AM26LS32A has a specified input sensitivity of ±200 mV over the common-mode range, while the AM26LS33A is specified with a wider input sensitivity of ±500 mV and includes an open-circuit fail-safe feature that forces the outputs to a defined high state when the inputs are open. The AM26LS32A does not include the open-input fail-safe function.
Are the AM26LS33ACDR and AM26LS32ACDG4 pin-compatible?
Yes. Both devices are offered in the same 16-pin SOIC (D) package with identical pin assignments: four differential receiver inputs, four outputs, a common enable, and supply pins. The pinout is common across the AM26LS32A and AM26LS33A families, so the two parts can be interchanged on an existing PCB footprint.
What is the difference between the "DR" and "DG4" suffixes?
The suffixes indicate packaging and shipping format, not electrical differences. "DR" denotes tape and reel packaging, while "DG4" denotes tube packaging (the "G4" indicates Pb-free/RoHS-compliant construction). Both parts are Pb-free and RoHS-compliant SOIC-16 devices; the choice between them is driven by assembly and inventory handling requirements.
What supply voltage and temperature range do these receivers support?
Both the AM26LS33ACDR and AM26LS32ACDG4 operate from a single 5 V supply (nominal 5 V, with the datasheet specifying operation over the 4.75 V to 5.25 V range) and are rated for the commercial temperature range of 0°C to 70°C. They are intended for balanced and unbalanced digital data transmission applications.
Can the AM26LS33ACDR directly replace the AM26LS32ACDG4 in an existing design?
Electrically and pin-wise the devices are interchangeable in the same SOIC-16 footprint, but the replacement should be validated against the design requirements. The AM26LS33A provides open-input fail-safe and a wider ±500 mV sensitivity threshold, whereas the AM26LS32A uses a ±200 mV threshold without open-input fail-safe. If the design relies on the tighter sensitivity or the fail-safe behavior, the substitution must be confirmed against the system's noise margin and fault conditions.
What are typical applications for these quad differential line receivers?
Both devices are used for balanced and unbalanced digital data transmission, including RS-422/RS-423 interfaces, industrial control and factory automation networks, point-to-point and multidrop data links, and general-purpose differential signal reception where four independent receivers are required in a single package.