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 AM26LS32ACDE4 are functionally interchangeable quad differential line receivers sharing the same SOIC-16 footprint, supply voltage range, and operating temperature range, with the AM26LS33ACDR offering a wider input common-mode range and the AM26LS32ACDE4 providing higher input sensitivity; both are viable substitutes with validation recommended for application-specific noise margins and fail-safe behavior.
Function and Channel Count
High match
Package and Pinout
High match
Supply Voltage Range
High match
Input Sensitivity and Common-Mode Range
Validation required
Parts at a glance
Part B
AM26LS32ACDE4
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 9006 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 | AM26LS32ACDE4 | Why it matters |
|---|---|---|---|
| Receiver Input Sensitivity | ±500 mV | ±200 mV | Higher sensitivity (lower threshold) allows the receiver to detect weaker differential signals over longer cables, improving noise margin and interoperability. |
| Receiver Input Voltage Range (Common-Mode) | -7 V to +7 V | -7 V to +7 V | Defines the common-mode voltage window over which the receiver reliably detects valid differential signals; wider range improves robustness in noisy or ground-shifted systems. |
| Number of Drivers / Receivers | 4 drivers / 4 receivers | 0 drivers / 4 receivers | The AM26LS33ACDR includes quad line drivers plus receivers, while the AM26LS32ACDE4 is a receiver-only device; this fundamentally affects whether the part can transmit as well as receive. |
| Driver Output Type | Tri-state differential | None (receiver only) | Tri-state differential drivers enable bus sharing and bidirectional communication; a receiver-only part cannot drive a differential bus. |
| Receiver Output Type | Tri-state | Tri-state | Tri-state outputs allow multiple receivers to share a common output bus without contention, which is important for multiplexed architectures. |
| Supply Voltage | 5 V (4.75 V to 5.25 V) | 5 V (4.75 V to 5.25 V) | Both operate from a standard 5 V supply, so power-rail compatibility is maintained when substituting one for the other. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range ensures reliable operation in harsh environments; matching ranges means thermal compatibility for substitution. |
| Package / Mounting | SOIC-16 (surface mount) | SOIC-16 (surface mount) | Identical package and footprint allow drop-in board replacement without layout changes. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | Maximum signaling rate determines suitability for high-speed serial links; matching rates preserve system throughput. |
| Fail-Safe Receiver | Yes (open-circuit fail-safe) | Yes (open-circuit fail-safe) | Fail-safe receivers output a defined logic state when inputs are open or idle, preventing indeterminate states on an unterminated bus. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS33ACDR | AM26LS32ACDE4 |
|---|---|---|
| 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 AM26LS32ACDE4?
Both are quadruple differential line receivers from Texas Instruments, designed to meet the requirements of TIA/EIA-422-B and TIA/EIA-423-B, as well as ITU Recommendations V.10 and V.11. The AM26LS33ACDR is supplied in an SOIC-16 package in tape-and-reel form, while the AM26LS32ACDE4 is supplied in an SOIC-16 package in tube form.
What is the difference between the AM26LS33ACDR and AM26LS32ACDE4?
The primary difference is the ordering and packaging designation: the AM26LS33ACDR is the tape-and-reel variant (suffix R) in an SOIC-16 package, and the AM26LS32ACDE4 is the tube variant (suffix E4) in the same SOIC-16 package. The AM26LS33A and AM26LS32A differ in input sensitivity and fail-safe characteristics per their respective datasheets, so the two base part numbers should not be treated as identical without checking the manufacturer datasheet.
Are the AM26LS33ACDR and AM26LS32ACDE4 pin-compatible?
Both devices are offered in the same SOIC-16 (D) package with the same pin count and pinout per the Texas Instruments datasheets, so they are pin-compatible at the package level. Electrical differences between the AM26LS33A and AM26LS32A families must still be verified against the datasheet before substitution.
What supply voltage do these receivers require?
Both the AM26LS33A and AM26LS32A operate from a single 5 V nominal supply, with the datasheet specifying a recommended operating supply voltage range of 4.75 V to 5.25 V.
What is the difference in input sensitivity between the AM26LS33A and AM26LS32A?
Per the Texas Instruments datasheets, the AM26LS32A specifies a maximum input sensitivity of ±200 mV over the common-mode range, while the AM26LS33A specifies a maximum input sensitivity of ±500 mV. Designers should confirm the applicable limits in the specific device datasheet for their operating conditions.
Do these receivers include fail-safe operation?
The AM26LS32A datasheet specifies fail-safe circuitry that ensures a high output when the inputs are open or undriven. The AM26LS33A datasheet specifies similar fail-safe behavior; however, the exact fail-safe conditions and thresholds should be verified in the respective datasheet before relying on them in a design.
What is the operating temperature range for these devices?
Both the AM26LS33ACDR and AM26LS32ACDE4 are specified for the commercial temperature range of 0°C to 70°C per the Texas Instruments datasheets.
Can the AM26LS33ACDR be used as a drop-in replacement for the AM26LS32ACDE4?
Because both are SOIC-16 devices with the same pinout and 5 V supply, they are physically interchangeable. However, the AM26LS33A and AM26LS32A differ in specified input sensitivity and fail-safe thresholds, so a drop-in replacement is only valid after confirming that the AM26LS33A's electrical specifications meet the requirements of the original AM26LS32A design.