SN74LVC1G07DCKR - 1.65V-5.5V Open-Drain Buffer SC-70-5 | Texas Instruments
MPN: SN74LVC1G07DCKR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.34 | $0.34 |
| 10 | $0.24 | $2.40 |
| 100 | $0.14 | $14.00 |
| 500 | $0.1 | $50.00 |
| 1,000 | $0.08 | $80.00 |
SN74LVC1G07DCKR Overview
A buffer/driver is a logic component in the broader family of single-gate CMOS logic devices within the digital logic IC hierarchy. Buffers provide signal isolation, fan-out enhancement, and level-tolerant interface between circuit blocks, and open-drain versions additionally permit wired-OR / wired-AND bus connections and level shifting to any pull-up rail voltage.
Key differentiating features include 5.5 V tolerant inputs and outputs that support partial-power-down designs via the Ioff circuitry, ultra-low power consumption with 10 uA maximum ICC, and compatibility across the full 1.65 V to 5.5 V VCC range. The device supports 5 V VCC operation while remaining usable in 1.8 V, 2.5 V, and 3.3 V systems, making it a universal interface glue-logic element. The SC-70-5 body measures approximately 2.0 mm x 1.25 mm, saving significant board area versus SOT-23 solutions.
Architecturally, the SN74LVC1G07 uses TI's LVC CMOS process technology from the controlled-baseline flow - one assembly site, one test site, one fabrication site - with extended temperature performance to 125 C. The single open-drain NMOS pull-down output stage intentionally omits any internal pull-up, so the high level is defined by the external pull-up resistor and its rail. When multiple outputs are tied together, the resulting node implements active-low wired-OR or active-high wired-AND logic without additional gates.
Typical applications include I2C and SMBus style open-drain bus buffering, level translation between mixed-voltage domains, LED and relay drive via the 32 mA sink capability, microcontroller GPIO buffering, and wired-logic signal merging in industrial and consumer electronics.
Design-wise, size the external pull-up resistor to trade off bus rise time against sink current; at 3.3 V a 4.7 kOhm pull-up keeps sink current near 0.7 mA while providing practical rise times on short traces. Unused inputs must never be left floating.
This page adds value beyond the TI datasheet by combining verified distributor pricing, drop-in alternative cross-references, FAQ structured for AI search, and practical design notes in one place.
Drop-in alternatives for SN74LVC1G07DCKR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SN74LVC1G07DCKR (same form factor and footprint) β differing in Ioff Partial-Power-Down, MSL Level, Operating Temperature, Output Drive at 3.3 V, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74LVC1G07DCKT
β Drop-Inπ Reference alternative (not in catalog)
74LVC1G07GW,66
β Drop-Inπ Reference alternative (not in catalog)
74LVC1G07GV,125
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC1G07DCKR Maximum Ratings & Electrical Characteristics
| Function | Single non-inverting buffer/driver |
| Output Type | Open drain |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Input/Output Tolerance | 5.5 V max |
| Maximum Sink Current | 32 mA |
| Output Drive at 3.3 V | +/-24 mA |
| Supply Current (ICC) | 10 uA max |
| Ioff Partial-Power-Down | Yes |
| Logic Family | LVC (CMOS) |
| Number of Elements | 1 element, 1 bit per element |
| Operating Temperature | -40 C to +125 C |
| Package | SC-70-5 (DCK), 2.0 mm x 1.25 mm |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (DCKR) |
| MSL Level | 1-260C-UNLIM |
| RoHS Status | Compliant |
SN74LVC1G07DCKR Pin Configuration
| Pin 1 | A β Data input |
| Pin 2 | GND β Ground |
| Pin 3 | Y β Open-drain output |
| Pin 4 | NC β Not connected (per datasheet) |
| Pin 5 | VCC β Power supply, 1.65 V to 5.5 V |
Typical Applications
SN74LVC1G07DCKR is suitable for 6 applications: I2C and SMBus Open-Drain Bus Buffering, Mixed-Voltage Level Translation, LED and Optocoupler Drive, Wired-Logic Signal Merging, Microcontroller GPIO Buffering and Fan-Out, Push-Pull Interface Conversion in Consumer Electronics.
I2C and SMBus Open-Drain Bus Buffering
The SN74LVC1G07DCKR fits I2C/SMBus bus segments because its open-drain output natively implements the wired-AND arbitration these buses require. The 1.65 V to 5.5 V supply range plus 5.5 V tolerant input/output lets a 3.3 V controller safely share a 5 V bus, and the 32 mA sink capacity far exceeds the 3 mA minimum sink requirement of the I2C specification, giving large noise margin. In use, the buffer sits between a controller SDA or SCL pin and the bus, with a 2.2 kOhm to 4.7 kOhm pull-up to the bus rail. The trade-off is added propagation delay from the resistor rise time, so keep bus capacitance low for Fast-mode 400 kHz operation.
Recommended
Mixed-Voltage Level Translation
For one-direction level translation between voltage domains, the SN74LVC1G07DCKR is a simple, low-cost choice. Powered from the low-voltage domain (for example 1.8 V or 3.3 V), its open-drain output pulls to ground regardless of the pull-up rail, so the pull-up resistor can reference a 5 V rail while the input receives a 1.8 V logic signal - the 5.5 V tolerant output and Ioff partial-power-down circuitry make this safe during sequencing. The circuit needs only one SC-70-5 device and one resistor, versus dedicated translators that need dual supplies. The limitation is unidirectional translation and slower edges than push-pull translators; capacitive loading on the pull-up determines rise time, so keep loads under roughly 50 pF for sub-microsecond edges.
Recommended
LED and Optocoupler Drive
The SN74LVC1G07DCKR drives LEDs, optocoupler input diodes, and status indicators directly because the open-drain output sinks up to 32 mA - well above the 5 mA to 20 mA typical LED current. The LED or optocoupler anode connects to a current-limiting resistor and supply rail, while the cathode ties to the Y output; asserting the buffer input low sinks current and lights the LED. This low-side sink architecture means the indicator can sit on a rail different from VCC, including 12 V or 24 V panels when the resistor limits current within the output voltage rating (observe the datasheet absolute maximum output voltage). Power dissipation in the device stays minimal because the LED resistor dissipates most of the energy.
Recommended
Wired-Logic Signal Merging
In industrial control panels, several condition signals often must combine into one alarm or interlock line, and the SN74LVC1G07DCKR implements this without discrete gates. Multiple open-drain outputs tied to one pull-up node form an active-high wired-AND (all must release the line for it to go high) or an active-low wired-OR (any device pulling low asserts the alarm). Because each LVC1G07 sinks up to 32 mA, a node shared by many devices remains safe even if several outputs conduct simultaneously - total node sink current must simply stay below 32 mA per device. Designers should compute worst-case node current as Vpullup divided by the pull-up resistor, keeping it comfortably below the rating, and use a single shared pull-up of 2.2 kOhm to 10 kOhm.
Recommended
Microcontroller GPIO Buffering and Fan-Out
Microcontroller GPIO pins have limited sink current (often 4 mA to 20 mA) and vulnerable output structures; the SN74LVC1G07DCKR buffers such signals with a rugged 32 mA sink output and 5.5 V tolerant input, protecting the MCU while extending drive distance across wiring harnesses or backplanes. Its 10 uA maximum ICC adds negligible system power, and the SC-70-5 package places the buffer close to the connector for signal integrity. The open-drain topology also provides isolation during partial-power-down: with Ioff, the output stays high-impedance when VCC is removed, preventing back-powering of the MCU rail through the buffer. Account for the resistor pull-up rise time when driving long capacitive cables.
Recommended
Push-Pull Interface Conversion in Consumer Electronics
Consumer boards frequently mix 1.8 V, 3.3 V, and 5 V push-pull outputs that must interoperate, and the SN74LVC1G07DCKR absorbs the mismatch cheaply. Its input reads 1.8 V logic reliably across the LVC family threshold, and its open-drain output re-references the signal to any rail through the pull-up, effectively converting any push-pull source into an open-drain sink with 5.5 V tolerance. This is useful for reset lines, enable lines, and peripheral handshake signals in set-top boxes, cameras, and small appliances. The one-bit-per-package format lets designers add buffers only where needed rather than paying for multi-gate devices, and MSL 1 handling simplifies reflow logistics for high-volume consumer assembly lines.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC1G07DCKR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC1G07DCKT | 74LVC1G07GW,66 | 74LVC1G07GV,125 |
|---|---|---|---|---|
| Package | SC-70-5 (DCK) | SC-70-5 (DCK) - same | SC-88A/SOT-353 (SC-70-5 compatible) | SC-88A/SOT-353 (SC-70-5 compatible) |
| Brand | Texas Instruments | Texas Instruments | Nexperia | Nexperia |
| Supply Voltage Range | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V |
| Output Type | Open drain, non-inverting | Open drain, non-inverting | Open drain, non-inverting | Open drain, non-inverting |
| 5.5 V Tolerant I/O | Yes | Yes | Yes | Yes |
| Packing | Tape & Reel (3000 units) | Cut tape / small reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Open-drain output enables wired-logic and level translation (vs SN74LVC1G125 (push-pull buffer))
- Compact SC-70-5 package saves board area (vs SN74LVC1G07DPWR (SOT-6/DBV-family))
- Ioff partial-power-down support (vs 74LVC1G07GW,66 (Nexperia))
Design Notes
Open-drain outputs consume power through the external pull-up, not the IC. Estimated: with a 3.3 V rail and 4.7 kOhm pull-up, a continuously low output dissipates 3.3V^2/4700 = 2.3 mW in the resistor plus a small sink-transistor loss - negligible. But with a 1 kOhm pull-up at 5 V the resistor burns 25 mW continuously, which matters in battery designs. Choose pull-up values of 4.7 kOhm or higher unless bus rise time demands otherwise, and compute total node current as Vpullup/Rpullup against the 32 mA sink limit.
Place a 100 nF ceramic decoupling capacitor within 2 mm of the VCC (pin 5) to GND (pin 2) pins on the SC-70-5 footprint. Although single-gate logic switches small charge, the SC-70 land pattern is tiny and shared rails on dense boards benefit from local decoupling. Use the standard SC-70/SOT-353 land pattern (approximately 2.1 mm x 2.4 mm overall) and do not attempt to reflow onto SOT-23-5 footprints - the pin pitch (0.65 mm vs 0.95 mm) and order differ.
Two frequent mistakes with the SN74LVC1G07: first, expecting the output to go high without a pull-up resistor - the open-drain output only sinks; no pull-up means the node floats. Second, confusing SC-70-5 (DCK) pin order with SOT-23-5 (DBV) pin order; TI does not use the same pin assignment, and soldering a DCK part onto a DBV footprint reverses VCC and GND. Also, never leave the A input floating in low-power designs; tie unused-condition inputs to a defined logic level.
Compliance Information
RoHS and REACH compliant per PartGenie compliance data; MSL Level 1-260C-UNLIM. Formal declarations available via TI product quality page.
