Part A
AM26LS33ACDR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1505 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26LS33ACDR and AM26LS31CDE4 are both quad differential line drivers in the same SOIC-16 package with identical supply voltage and temperature ranges, making them strong functional replacement candidates. The primary distinction is the receiver input threshold architecture, which requires validation against the target application's bus termination and fail-safe requirements before substitution.
Function and Channel Count
High match
Package and Pinout
High match
Supply Voltage and Temperature Range
High match
Receiver Input Threshold
Validation required
Parts at a glance
Part B
AM26LS31CDE4
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 8888 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 | AM26LS31CDE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | Receiver vs. driver roles are not interchangeable; they serve opposite ends of a differential link. |
| Device Type | Receiver | Driver | Determines signal direction and whether the part can transmit or receive on the bus. |
| Number of Drivers/Receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | Channel configuration must match the system's transmit/receive requirements. |
| Input/Output Compatibility Standard | RS-422, RS-423, RS-485 receiver | RS-422, RS-423 driver | Standards compliance affects interoperability with other bus transceivers. |
| Receiver Input Sensitivity | ±200 mV | N/A (driver) | Sensitivity defines the minimum differential voltage a receiver can reliably detect. |
| Output Drive Current | N/A (receiver) | ±60 mA typical | Drive current determines the load a driver can source/sink on the bus. |
| Supply Voltage | 5 V nominal | 5 V nominal | Both operate from a 5 V rail, so power supply requirements are compatible. |
| Package / Mounting | SOIC-16, surface mount | SOIC-16, surface mount | Identical package and footprint allow drop-in board placement, though function differs. |
| Operating Temperature Range | -40°C to +85°C | 0°C to +70°C | Temperature range affects suitability for industrial vs. commercial environments. |
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 | AM26LS31CDE4 |
|---|---|---|
| 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 | 4.75V ~ 5.25V |
| 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 AM26LS33ACDR and AM26LS31CDE4?
The AM26LS33ACDR is a quad differential line receiver from Texas Instruments in an SOIC-16 package, while the AM26LS31CDE4 is a quad differential line driver from Texas Instruments in a SOIC-16 package. They are complementary devices used for balanced (differential) data transmission, typically paired together in RS-422/RS-485-type interfaces.
Can the AM26LS33ACDR and AM26LS31CDE4 be used together in the same system?
Yes. The AM26LS31CDE4 quad differential line driver and the AM26LS33ACDR quad differential line receiver are designed to interoperate on a balanced differential bus. The driver transmits complementary outputs that the receiver senses as a differential input, which is the standard configuration for RS-422/RS-485 communication links.
What is the functional difference between the AM26LS33ACDR and AM26LS31CDE4?
The AM26LS31CDE4 is a line driver that converts single-ended logic inputs into differential outputs to drive a twisted-pair or balanced cable. The AM26LS33ACDR is a line receiver that converts differential bus signals back into single-ended logic levels. In short, the '31 is the transmit side and the '33 is the receive side.
Are the AM26LS33ACDR and AM26LS31CDE4 pin-compatible or interchangeable?
No. Although both are 16-pin SOIC devices, they are not interchangeable because they perform opposite functions (driver versus receiver) and have different pin functions and internal circuitry. The AM26LS31CDE4 cannot be substituted for the AM26LS33ACDR or vice versa in a given socket.
What package do the AM26LS33ACDR and AM26LS31CDE4 use?
Both devices are supplied in a 16-pin SOIC (small-outline integrated circuit) package. The AM26LS33ACDR suffix "DR" denotes a tape-and-reel SOIC-16 shipment, and the AM26LS31CDE4 suffix "DE4" denotes a SOIC-16 tube/rail shipment from Texas Instruments.
What supply voltage do the AM26LS33ACDR and AM26LS31CDE4 require?
Both devices operate from a single 5 V supply, consistent with the standard TIA/EIA-422 and TIA/EIA-485 logic families. Designers should confirm the exact recommended operating conditions in the respective Texas Instruments datasheets before finalizing a design.
Do the AM26LS33ACDR and AM26LS31CDE4 support tri-state outputs?
Yes. The AM26LS31CDE4 driver provides tri-state outputs controlled by an enable pin, allowing the driver to be placed in a high-impedance state for bus sharing. The AM26LS33ACDR receiver also provides a tri-state output enable, permitting multiple receivers to share a common data bus. Refer to the datasheets for the exact enable logic and truth tables.
Which device should be selected for a new RS-422/RS-485 design, the AM26LS33ACDR or AM26LS31CDE4?
Selection depends on the signal direction required. Choose the AM26LS31CDE4 when a differential driver (transmitter) is needed, and choose the AM26LS33ACDR when a differential receiver is needed. A complete point-to-point or multidrop link typically uses both: a '31 driver at the transmitting end and a '33 receiver at the receiving end.