Part A
AM26C31CDR
德州儀器
- Lifecycle
- Active
- Stock
- 5213 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Compatible functional replacement candidate
The AM26C31CDR and AM26C31CDRE4 are functionally equivalent quad differential line drivers from the same manufacturer, sharing identical electrical specifications, package type, and pinout. The only distinction is the reel packaging suffix, making them interchangeable for design and production purposes. Both parts can be used as direct substitutes without any circuit modification or requalification.
Function and Logic Family
High match
Package Type and Pinout
High match
Electrical Specifications
High match
Operating Temperature Range
High match
Parts at a glance
Part B
AM26C31CDRE4
德州儀器
- Lifecycle
- Active
- Stock
- 7084 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26C31CDR | AM26C31CDRE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line driver | Both parts perform the same core function, so they are functionally interchangeable in a circuit. |
| Number of Drivers | 4 | 4 | The driver count determines how many differential lines each device can drive. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | The operating voltage range must match the system supply for proper operation. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and match RS-422/RS-485 signaling requirements. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | The maximum data rate must meet the signaling speed required by the application. |
| Package / Mounting | 16-SOIC, surface mount | 16-SOIC, surface mount | Package and mounting style must match the PCB footprint for a drop-in replacement. |
| Operating Temperature Range | -40 °C to 85 °C | -40 °C to 85 °C | The temperature range must cover the environment in which the device will operate. |
| RoHS Compliance | RoHS compliant | RoHS compliant | RoHS status affects regulatory compliance and suitability for certain markets. |
| Ordering Suffix / Packaging | Standard tape-and-reel orderable (CDR) | "E4" RoHS/lead-free orderable variant (CDRE4) | The suffix distinguishes orderable part variants; the E4 version is the lead-free/RoHS orderable code, which matters for procurement and compliance tracking. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26C31CDR | AM26C31CDRE4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Driver | Driver |
| Number of Drivers/Receivers | 4/0 | 4/0 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AM26C31CDR and the AM26C31CDRE4?
The AM26C31CDR and AM26C31CDRE4 are functionally identical quad differential line drivers from Texas Instruments. The only difference is the packaging suffix: the "R" in AM26C31CDR denotes tape-and-reel packaging, while the "RE4" in AM26C31CDRE4 denotes a specific tape-and-reel packing variant (E4 designates a lead-free/RoHS-compliant reel configuration per TI's ordering nomenclature). Both are the same silicon device in the same SOIC-16 (D) package.
Are the AM26C31CDR and AM26C31CDRE4 electrically and functionally interchangeable?
Yes. Both devices share the same datasheet parameters: quad 3-state differential line drivers, 5 V nominal supply, TIA/EIA-422-B and ITU-T V.11 compliance, ±7 V common-mode range, and SOIC-16 (D) package. Because they are the same die and package, they are electrically and functionally interchangeable in a given design.
What package and pinout do the AM26C31CDR and AM26C31CDRE4 use?
Both parts are supplied in the Texas Instruments D package, a 16-pin SOIC (Small-Outline Integrated Circuit) with 1.27 mm pitch. The pinout is identical: four differential driver outputs (1A/1B through 4A/4B), four inputs (1Y through 4Y), two enable inputs (1,2EN and 3,4EN), VCC, and GND.
What supply voltage and signaling standard do these devices support?
Both the AM26C31CDR and AM26C31CDRE4 operate from a single 5 V nominal supply (recommended operating range 4.5 V to 5.5 V) and are designed for balanced differential transmission compliant with TIA/EIA-422-B and ITU-T Recommendation V.11. They feature a common-mode output range of ±7 V and are intended for RS-422-type differential data transmission.
Do the AM26C31CDR and AM26C31CDRE4 differ in RoHS or lead-free status?
Both orderable part numbers are lead-free (Pb-free) and RoHS-compliant per Texas Instruments' product status. The "E4" suffix in AM26C31CDRE4 is TI's ordering code for a lead-free (NiPdAu) tape-and-reel packing variant; the AM26C31CDR is also supplied as a Pb-free, RoHS-compliant tape-and-reel part. Designers should confirm the current RoHS declaration on the TI product page for the exact orderable number used.
Can I substitute AM26C31CDRE4 for AM26C31CDR in an existing PCB design?
Yes, from a footprint and electrical standpoint the two are drop-in compatible because they share the same SOIC-16 (D) package, pinout, and datasheet specifications. The substitution affects only the reel/packing configuration and orderable part number, not the board-level design. Verify the current datasheet and PCN status for the specific orderable number before release.
What is the function of the enable pins on the AM26C31CDR and AM26C31CDRE4?
Both devices provide two active-high enable inputs: 1,2EN controls drivers 1 and 2, and 3,4EN controls drivers 3 and 4. When an enable input is high, the associated driver outputs are active; when low, those outputs are placed in a high-impedance (3-state) condition, allowing multiple drivers to share a bus.