Part A
AM26LS32ACDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2449 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26LV32CDR and AM26LS32ACDR are functionally comparable quad differential line receivers in the same SOIC-16 package, making the AM26LV32CDR a viable replacement candidate for the AM26LS32ACDR in most designs. The primary distinction is the supply voltage domain, since the AM26LV32CDR operates from a 3.3 V rail while the AM26LS32ACDR is specified for 5 V operation; designs must confirm that the system supply and connected driver levels are compatible before substitution.
Supply Voltage
Validation required
Function and Channel Count
High match
Package Type
High match
Output Interface Compatibility
Validation required
Parts at a glance
Part B
AM26LV32CDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3036 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, 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 | AM26LV32CDR | AM26LS32ACDR | 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. |
| Receiver Type | Quad differential line receiver (RS-422/RS-485 compatible) | Quad differential line receiver (RS-422/RS-423/RS-485 compatible) | Both are quad differential receivers, but the AM26LS32A explicitly supports RS-423 single-ended signaling in addition to differential standards. |
| Input Sensitivity | ±200 mV | ±200 mV | Identical input sensitivity ensures comparable noise margin and detection of small differential signals in both parts. |
| Maximum Data Rate | 32 Mbps | 10 Mbps | The AM26LV32CDR supports higher signaling rates, which matters for high-speed serial links where the AM26LS32A may be a bottleneck. |
| Propagation Delay | ~9 ns (typical) | ~17 ns (typical) | Lower propagation delay in the AM26LV32CDR enables faster timing margins and higher throughput in synchronous systems. |
| Output Logic Level Compatibility | 3.3 V CMOS/TTL compatible outputs | 5 V TTL/CMOS compatible outputs | Output levels must match the downstream logic family; mixing 3.3 V and 5 V logic without level shifting can cause interoperability issues. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ranges mean both parts are suitable for the same environmental conditions. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Same package and pinout allow PCB footprint reuse, though electrical differences still prevent direct substitution. |
| Number of Receivers | 4 | 4 | Both provide four independent receivers, so channel count is not a differentiator for functional substitution. |
| Fail-Safe / Input Hysteresis | ~50 mV input hysteresis | ~50 mV input hysteresis | Comparable hysteresis provides similar noise immunity and prevents output oscillation on slow or noisy inputs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32ACDR | AM26LV32CDR |
|---|---|---|
| Part Status | Active | Active |
| Type | Receiver | Receiver |
| Protocol | RS422, RS423 | RS422, RS485 |
| Number of Drivers/Receivers | 0/4 | 0/4 |
| Receiver Hysteresis | 50 mV | 50 mV |
| 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 |
Frequently asked questions
What are the primary differences between the AM26LV32CDR and AM26LS32ACDR?
The AM26LV32CDR is a low-voltage quad differential line receiver designed for 3.3 V supply operation, while the AM26LS32ACDR is a quad differential line receiver designed for 5 V supply operation. The AM26LV32CDR features a wider common-mode input voltage range and is optimized for low-power, low-voltage systems, whereas the AM26LS32ACDR is a legacy 5 V device with standard RS-422/RS-485 receive characteristics.
Are the AM26LV32CDR and AM26LS32ACDR pin-compatible?
Yes, both devices are offered in the same 16-pin SOIC (D) package with identical pin assignments, allowing them to share the same PCB footprint. However, pin compatibility does not guarantee electrical compatibility; the supply voltage and input/output characteristics differ and must be validated for the target design.
What supply voltage does each device require?
The AM26LV32CDR operates from a single 3.3 V supply (typically 3.0 V to 3.6 V), while the AM26LS32ACDR operates from a single 5 V supply (typically 4.75 V to 5.25 V). The two devices are not interchangeable without verifying that the system supply and logic levels match the selected device.
Do both devices support RS-422 and RS-485 differential signaling?
Yes, both the AM26LV32CDR and AM26LS32ACDR are quad differential line receivers intended for RS-422 and RS-485 balanced data transmission. They feature differential inputs with high common-mode rejection and are suitable for multipoint bus transmission over twisted-pair cable.
How do the common-mode input voltage ranges compare?
The AM26LV32CDR specifies a common-mode input voltage range of approximately -0.3 V to 5.5 V, which allows operation in 3.3 V systems with extended common-mode tolerance. The AM26LS32ACDR specifies a common-mode input voltage range of approximately -7 V to 7 V, consistent with its 5 V RS-422/RS-485 application environment. Designers should confirm the exact limits in the respective manufacturer datasheets.
Can the AM26LV32CDR be used as a drop-in replacement for the AM26LS32ACDR in an existing 5 V design?
No. The AM26LV32CDR is a 3.3 V device and is not rated for 5 V supply operation. Substituting it into a 5 V system would exceed its absolute maximum supply rating and could damage the device. A replacement decision must account for supply voltage, logic-level compatibility, and input common-mode requirements.
What are the typical output logic levels of each receiver?
The AM26LV32CDR provides 3.3 V-compatible outputs (TTL/CMOS-compatible at 3.3 V), while the AM26LS32ACDR provides 5 V-compatible outputs (TTL-compatible at 5 V). The output high and low levels must be matched to the receiving logic family in the system to avoid interface errors.
Which device is better suited for low-power, battery-operated designs?
The AM26LV32CDR is generally better suited for low-power, battery-operated designs because it operates at 3.3 V and is specified for lower supply current than the 5 V AM26LS32ACDR. Designers should compare the quiescent and dynamic supply current specifications in the respective datasheets for the exact operating conditions.