Part A
AM26LS33ACDR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 1505 個数
- Package
- SOIC-16
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
Replacement verdict
Compatible functional replacement candidate
The AM26LV31CDRE4 can serve as a functional replacement candidate for the AM26LS33ACDR in 3.3 V quad differential line driver applications, provided the board layout is revised for the different package footprint and the tighter supply voltage range is acceptable. The two devices share the same quad differential driver function and similar signaling architecture, but differ in supply voltage, package, and signaling standard compliance, so validation on the target design is recommended before committing to the substitution.
Supply Voltage Range
Validation required
Package Type
Validation required
Driver Channel Count
High match
Signaling Standard Compliance
Validation required
Parts at a glance
Part B
AM26LV31CDRE4
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 3614 個数
- Package
- SOIC-16
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
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 | AM26LV31CDRE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | Receiver vs driver function determines signal direction; these are not direct substitutes in a link. |
| Supply Voltage (VCC) | 5 V nominal | 3.0 V to 3.6 V | Different supply rails mean the parts cannot share the same power domain without level shifting. |
| Logic Family | RS-422 / RS-423 (5 V) | RS-422 / RS-485 low-voltage (3.3 V) | Family compatibility affects signaling levels and interoperability with other nodes on the bus. |
| Number of Drivers/Receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | Pin function and channel direction differ, so board-level wiring and pinout usage are incompatible. |
| Output Type | Tri-state differential receiver outputs | Tri-state differential driver outputs | Output stage behavior determines bus drive capability and whether the device can source a differential signal. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Same package footprint allows PCB drop-in, but electrical differences still prevent direct substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings support use in similar industrial environments. |
| Data Rate | Up to 10 Mbps | Up to 32 Mbps | Maximum signaling rate affects suitability for high-speed serial links. |
| RoHS Status | RoHS compliant | RoHS compliant (green) | Both meet environmental compliance requirements for commercial assembly. |
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 | AM26LV31CDRE4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Receiver | Driver |
| Protocol | - | RS422, RS485 |
| Number of Drivers/Receivers | 0/4 | 4/0 |
| Voltage - Supply | 4.75V ~ 5.25V | 3V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Receiver Hysteresis | 50 mV | - |
Frequently asked questions
What are the primary functional differences between the AM26LS33ACDR and the AM26LV31CDRE4?
The AM26LS33ACDR is a quad differential line receiver designed for RS-422, RS-423, and RS-485 applications, featuring a wide common-mode input range and input hysteresis. The AM26LV31CDRE4 is a quad differential line driver designed for low-voltage (3.3 V) RS-422 and RS-485 applications, providing high output drive current. In short, the AM26LS33ACDR is a receiver, while the AM26LV31CDRE4 is a driver.
Are the AM26LS33ACDR and AM26LV31CDRE4 pin-to-pin compatible?
Both devices are offered in a 16-pin SOIC (D) package, but they are not functionally interchangeable because one is a receiver and the other is a driver. Pin assignments differ in function, so a direct drop-in substitution is not valid without verifying the pinout against the respective manufacturer datasheets.
What supply voltage does each device require?
The AM26LS33ACDR operates from a single 5 V supply (nominal 5 V, with the standard 4.75 V to 5.25 V range typical for the AM26LS33A family). The AM26LV31CDRE4 is a low-voltage device designed for a 3.3 V supply (nominally 3.0 V to 3.6 V). The differing supply requirements mean they are not directly interchangeable in the same socket without supply redesign.
Can the AM26LV31CDRE4 drive a bus that the AM26LS33ACDR receives?
Yes, in principle a driver and receiver pair can form a differential link, but the electrical compatibility must be verified. The AM26LV31CDRE4 is a 3.3 V driver with RS-422/RS-485 output levels, and the AM26LS33ACDR is a 5 V receiver with a wide common-mode input range. The system designer must confirm that the driver's differential output swing and common-mode voltage fall within the receiver's specified input range per the datasheets.
What are the typical applications for each device?
The AM26LS33ACDR is typically used as a differential line receiver in balanced data transmission systems such as RS-422/RS-485 networks, industrial control, and point-to-point links. The AM26LV31CDRE4 is typically used as a low-voltage differential line driver in 3.3 V RS-422/RS-485 systems, motor control, and industrial automation where low power and 3.3 V logic compatibility are required.
Do both devices support the same data rates?
Data rate capability differs and must be confirmed from the manufacturer datasheets. The AM26LS33ACDR is specified for RS-422/RS-485 receiver operation at rates consistent with the AM26LS33A family, while the AM26LV31CDRE4 is a low-voltage driver with its own specified maximum signaling rate. Designers should verify the maximum data rate for each device against the official datasheet before use in high-speed links.
What package and operating temperature range do these devices offer?
Both the AM26LS33ACDR and AM26LV31CDRE4 are supplied in a 16-pin SOIC (D) package. The AM26LS33ACDR is specified over the standard industrial temperature range (typically -40°C to +85°C for the A-grade), and the AM26LV31CDRE4 is also specified over an industrial temperature range. Exact temperature grades should be confirmed from the respective manufacturer datasheets.
Can the AM26LS33ACDR and AM26LV31CDRE4 be used together in a single design?
Yes, they can be used together as a receiver/driver pair in a differential communication link, provided the supply voltages, logic levels, and bus electrical characteristics are matched. The 3.3 V AM26LV31CDRE4 driver and the 5 V AM26LS33ACDR receiver require level-compatible interfacing and verification that the driver output levels satisfy the receiver input specifications per the datasheets.