Part A
AM26LV32IDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 7519 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
Replacement verdict
Compatible functional replacement candidate
The AM26LV32IDR and AM26LS32ACDG4 are both quad differential line receivers in the same SOIC-16 package with identical pinout, making them a viable functional replacement candidate. The AM26LV32IDR offers a lower supply voltage range and reduced power consumption, while the AM26LS32ACDG4 provides a wider supply voltage range and higher differential input voltage tolerance. Designers should validate supply voltage compatibility and input signal levels before substituting one for the other in existing designs.
Function and Channel Count
High match
Package and Pinout
High match
Supply Voltage Range
Validation required
Input Voltage Compatibility
Validation required
Parts at a glance
Part B
AM26LS32ACDG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 5692 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LV32IDR | AM26LS32ACDG4 | Why it matters |
|---|---|---|---|
| Supply Voltage (Vcc) | 3.0 V to 3.6 V | 4.75 V to 5.25 V | The two devices operate on different supply rails (3.3 V vs 5 V), so they are not drop-in replacements without adjusting the system power supply. |
| Logic Family | LV (Low-Voltage) differential line receiver | LS (standard 5 V) differential line receiver | Logic family determines compatible signal levels and interfacing with surrounding logic; mixing families can cause level-mismatch issues. |
| Input Common-Mode Voltage Range | -0.3 V to 5.5 V (with Vcc = 3.3 V) | -7 V to +7 V | A wider common-mode range provides better noise immunity and tolerance to ground offsets in RS-422/RS-485 buses; the LS device tolerates larger offsets. |
| Propagation Delay (typical) | ~9 ns | ~17 ns | Propagation delay affects maximum data rate and timing margins; the LV device is faster, which matters for high-speed signaling. |
| Maximum Data Rate | Up to 32 Mbps | Up to 10 Mbps | Data rate capability determines whether the part suits a given bus speed; the LV device supports higher throughput. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Package footprint and pinout must match for board-level substitution; both use the same SOIC-16 outline here. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms suitability for industrial environments; identical ranges mean equivalent thermal robustness. |
| Number of Receivers | 4 | 4 | Channel count must match the bus topology; both provide four differential receivers, preserving functional capacity. |
| Output Type | 3-state (tri-state) outputs | 3-state (tri-state) outputs | Tri-state outputs allow bus sharing and multiplexing; identical output structure supports equivalent system architectures. |
| Fail-Safe / Hysteresis | ~50 mV input hysteresis | ~50 mV input hysteresis | Input hysteresis improves noise immunity on floating or slow edges; matching values indicate comparable noise tolerance. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV32IDR | AM26LS32ACDG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Receiver | Receiver |
| Protocol | RS422, RS485 | RS422, RS423 |
| Number of Drivers/Receivers | 0/4 | 0/4 |
| Receiver Hysteresis | 50 mV | 50 mV |
| Voltage - Supply | 3V ~ 3.6V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AM26LV32IDR and AM26LS32ACDG4?
The AM26LV32IDR is a low-voltage quad differential line receiver optimized for 3.3 V supply operation, while the AM26LS32ACDG4 is a quad differential line receiver designed for 5 V supply operation. The AM26LV32IDR is supplied in an SOIC-16 package, and the AM26LS32ACDG4 is supplied in an SOIC-16 package as well, but they differ in supply voltage range, input sensitivity thresholds, and output drive characteristics per their respective datasheets.
What supply voltage ranges do the AM26LV32IDR and AM26LS32ACDG4 support?
The AM26LV32IDR operates from a single 3.0 V to 3.6 V supply, making it suitable for 3.3 V logic systems. The AM26LS32ACDG4 operates from a single 5 V supply, typically 4.75 V to 5.25 V, consistent with standard 5 V TTL/CMOS systems.
Are the AM26LV32IDR and AM26LS32ACDG4 pin-compatible?
Both devices are offered in a 16-pin SOIC package with the same quad receiver pinout (four differential inputs, four outputs, enable pins, VCC, and GND). However, pin compatibility alone does not guarantee interchangeability; supply voltage, input thresholds, and output levels must be verified against the target design requirements.
What differential input standards do these receivers support?
The AM26LV32IDR is designed to meet the requirements of TIA/EIA-422-B and TIA/EIA-485-A differential input specifications at 3.3 V, with a common-mode range of approximately -7 V to +7 V. The AM26LS32ACDG4 meets TIA/EIA-422-B and TIA/EIA-423-B requirements at 5 V, with a common-mode input range of approximately -7 V to +7 V. Both are intended for balanced differential data transmission.
Can the AM26LV32IDR be used as a drop-in replacement for the AM26LS32ACDG4 in an existing 5 V design?
No. The AM26LV32IDR is specified for 3.0 V to 3.6 V operation and is not rated for 5 V supply. Substituting it into a 5 V design would exceed its absolute maximum supply rating and is not supported by the datasheet. A 5 V design should retain a 5 V-rated receiver such as the AM26LS32ACDG4 unless the entire supply and logic interface are redesigned for 3.3 V.
What are the output logic levels of each device?
The AM26LV32IDR provides 3.3 V-compatible outputs intended to interface with 3.3 V logic, with output high and low levels specified under 3.3 V supply conditions. The AM26LS32ACDG4 provides 5 V TTL-compatible outputs with VOH and VOL specified under 5 V supply conditions. Output levels should be matched to the receiving logic family in the design.
Do both devices offer three-state outputs and enable control?
Yes. Both the AM26LV32IDR and AM26LS32ACDG4 are quad differential line receivers with three-state outputs and enable inputs that allow the outputs to be placed in a high-impedance state. The enable logic polarity and pin assignments should be confirmed from the respective manufacturer datasheets for the specific package variant.
Which device should be selected for a new 3.3 V system versus a legacy 5 V system?
For a new 3.3 V system, the AM26LV32IDR is the appropriate choice because it is specified for 3.0 V to 3.6 V operation and provides 3.3 V-compatible outputs. For a legacy 5 V system, the AM26LS32ACDG4 is appropriate because it is specified for 5 V operation and provides 5 V TTL-compatible outputs. Selection should be based on the supply rail and logic interface of the target design, verified against the manufacturer datasheets.