Part A
74LVC2G125DP
Nexperia USA Inc.
- Lifecycle
- Active
- Stock
- 4957 PCS
- Package
- TSSOP-8
- Series
- Logique - Buffers, lecteurs, récepteurs, émetteurs - récepteurs
Replacement verdict
Not a drop-in replacement
The 74LVC2G125DP and 74LVC244ATTR are not functionally interchangeable. The 74LVC2G125DP is a dual-bit buffer with 3-state outputs in a small TSSOP-8 package, while the 74LVC244ATTR is an octal buffer with 3-state outputs in a TSSOP-20 package. The significant differences in channel count, package footprint, and pin configuration make direct substitution impractical without board redesign.
Different channel count
Different footprint
Different pin configuration
Different package type
Parts at a glance
Part B
74LVC244ATTR
Semi - conducteurs optiques
- Lifecycle
- Active
- Stock
- 5927 PCS
- Package
- TSSOP-20
- Series
- Logique - Buffers, lecteurs, récepteurs, émetteurs - récepteurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74LVC2G125DP | 74LVC244ATTR | Why it matters |
|---|---|---|---|
| Logic Function | Dual Buffer/Line Driver with 3-state outputs | Octal Buffer/Line Driver with 3-state outputs | Determines the number of independent buffer channels available; a dual device handles 2 signals while an octal device handles 8, directly affecting circuit density and channel count. |
| Number of Channels | 2 | 8 | Channel count dictates how many signals can be buffered simultaneously; substituting a 2-channel part for an 8-channel part would leave six signals unbuffered. |
| Output Enable Control | Individual OE per channel (active LOW) | Two group OE pins (active LOW), one per 4-channel bank | Independent per-channel enables allow finer control of individual signal paths, whereas grouped enables control banks of four channels together, affecting flexibility in bus arbitration and multiplexing. |
| Package | TSSOP-8 / SOT505-2 | TSSOP-20 | Package footprint and pin count must match the PCB layout; a TSSOP-8 cannot be soldered onto a TSSOP-20 pad pattern, making them non-interchangeable without a board redesign. |
| Supply Voltage Range | 1.65 V to 5.5 V | 1.65 V to 3.6 V | The wider supply range of the 2G125 allows operation at 5 V, while the 244A is limited to 3.6 V; this affects compatibility with 5 V logic systems and level-shifting applications. |
| Propagation Delay (tpd) | ~3.7 ns at 3.3 V | ~5.5 ns at 3.3 V | Faster propagation delay enables higher-speed signal transmission; a slower device may not meet timing requirements in high-frequency designs. |
| Output Drive Current (IOH/IOL) | ±24 mA at 3.0 V | ±24 mA at 3.0 V | Drive current determines the ability to drive capacitive loads and fan-out; identical drive strength means both can handle similar load conditions per channel. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | A wider temperature range allows operation in harsher environments; the 2G125 supports automotive-grade temperatures while the 244A is limited to commercial/industrial ranges. |
| Input Clamp Diodes | Yes (standard LVC input structure) | Yes (standard LVC input structure) | Input clamp diodes protect against voltage overshoot and undershoot; both devices include them, ensuring similar input protection characteristics. |
| Pin Count | 8 | 20 | Pin count affects PCB routing complexity and board space; an 8-pin device is more compact but offers fewer channels than a 20-pin device. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74LVC2G125DP | 74LVC244ATTR |
|---|---|---|
| Supplier | - | STMicroelectronics |
| Series | - | 74LVC |
| Part Status | Active | Obsolete |
| Logic Type | - | Buffer, Non-Inverting |
| Number of Elements | - | 2 |
| Number of Bits per Element | - | 4 |
| Output Type | - | 3-State |
| Current - Output High Low | - | 24mA, 24mA |
| Voltage - Supply | - | 1.65V ~ 3.6V |
| Operating Temperature | - | -55°C ~ 125°C (TA) |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the main functional differences between the 74LVC2G125DP and the 74LVC244ATTR?
The 74LVC2G125DP is a dual non-inverting buffer/line driver with 3-state outputs, offering two independent channels with individual output enable pins. The 74LVC244ATTR is an octal non-inverting buffer/line driver with 3-state outputs, providing eight channels controlled by two output enable pins (one for each group of four channels). The 74LVC2G125DP is a dual-channel device, while the 74LVC244ATTR is an octal device.
Are the 74LVC2G125DP and 74LVC244ATTR pin-compatible or package-compatible?
No. The 74LVC2G125DP is supplied in a TSSOP-8 package (DP suffix), while the 74LVC244ATTR is supplied in a TSSOP-20 package (ATTR suffix). They have different pin counts, pinouts, and PCB land patterns, so they are not drop-in replacements for each other.
Can the 74LVC2G125DP and 74LVC244ATTR operate from the same supply voltage range?
Yes. Both devices are part of the LVC family and are specified for a supply voltage range of 1.65 V to 3.6 V, with typical operation at 1.8 V, 2.5 V, and 3.3 V. Always verify the exact datasheet for the specific manufacturer and orderable part number.
How do the output drive capabilities compare between the 74LVC2G125DP and the 74LVC244ATTR?
Both devices typically provide ±24 mA output drive at 3.3 V VCC, which is a standard LVC family specification. However, the 74LVC244ATTR distributes this drive across eight outputs, while the 74LVC2G125DP provides it on two outputs. Confirm the exact drive current from the manufacturer datasheet for the specific part number.
What is the difference in output enable control between the 74LVC2G125DP and the 74LVC244ATTR?
The 74LVC2G125DP has two independent output enable (OE) pins, one per channel, allowing each buffer to be controlled separately. The 74LVC244ATTR has two output enable pins, each controlling a group of four channels (1OE controls channels 1–4, 2OE controls channels 5–8). This affects how the outputs are tri-stated in a design.
Which device is more suitable for bus-oriented applications, the 74LVC2G125DP or the 74LVC244ATTR?
The 74LVC244ATTR is generally more suitable for bus-oriented applications because its eight channels and grouped output enable pins allow it to buffer a full byte or multiple signal lines with a single device. The 74LVC2G125DP is better suited for applications requiring only one or two buffered lines with independent control.
Do the 74LVC2G125DP and 74LVC244ATTR have the same operating temperature range?
Both devices are typically specified for the industrial temperature range of –40 °C to +125 °C or –40 °C to +85 °C, depending on the manufacturer and specific orderable part number. Always check the exact datasheet for the device being used, as temperature grades can vary by supplier.
Can the 74LVC2G125DP be used as a direct substitute for one section of the 74LVC244ATTR?
Functionally, one channel of the 74LVC2G125DP can replicate one channel of the 74LVC244ATTR, but they are not direct substitutes due to differences in package, pinout, channel count, and output enable grouping. A redesign of the PCB and control logic would be required if replacing one with the other.