Texas Instruments

SN74LVC1T45DCKR - Single-Bit Level Translator | Texas Instruments

Name: SN74LVC1T45DCKR
Brand: Texas Instruments
Price: 0.19 USD
Availability: InStock

MPN: SN74LVC1T45DCKR ✓ Active

In Stock Ships in 1-3 business days

1.65 V to 5.5 V Vdss 10 µA max Id SC-70-6 (DCK) Package

From $0.19 USD / Unit

MOQ: 1 |

Price updated: 2026-08-25

Volume Pricing

Qty	Unit Price	Extended
1	$0.45	$0.45
10	$0.38	$3.80
100	$0.29	$29.00
500	$0.24	$120.00
1,000	$0.19	$190.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for SN74LVC1T45DCKR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

SN74LVC1T45DCKT

✅ Drop-In

📦 SC-70-6 (DCK)

Same die and package, tape-and-reel packaging variant

📋 Reference alternative (not in catalog)

ℹ️ 4 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

SN74LVC1T45DCKR Maximum Ratings & Electrical Characteristics

Technology	CMOS
Device Type	Line / Bus Driver
Number of Channels	1
Supply Voltage (VCCA)	1.65 V to 5.5 V
Supply Voltage (VCCB)	1.65 V to 5.5 V
Data Rate	420 Mbps
Propagation Delay (tpd)	3.3 ns at 3.3 V
Output Drive	±24 mA at 3.3 V
Quiescent Current (ICC)	10 µA max
Input Voltage Tolerance	5.5 V max
ESD Protection	2000-V HBM (JESD 22-A114-A)
Operating Temperature	-40°C to +125°C
Package	SC-70-6 (DCK)
Mounting Type	Surface Mount
RoHS Status	Compliant

SN74LVC1T45DCKR Pin Configuration

Pin 1	VCCA — Supply voltage A (1.65 V to 5.5 V)
Pin 2	GND — Ground
Pin 3	A — Data input/output port A
Pin 4	B — Data input/output port B
Pin 5	DIR — Direction control (high: A to B, low: B to A)
Pin 6	VCCB — Supply voltage B (1.65 V to 5.5 V)

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

SN74LVC1T45DCKR is suitable for 6 applications: I2C Bus Level Shifting, SPI Interface Translation, Mixed-Voltage Microcontroller Interfacing, Automotive Sensor Interfaces, Portable Battery-Powered Devices, Industrial Control Systems.

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I2C Bus Level Shifting

The SN74LVC1T45DCKR is ideal for I2C bus level shifting between different voltage domains. With a data rate of 420 Mbps, it easily handles I2C's 400 kbps fast mode. The bidirectional capability and 3-state outputs allow proper bus arbitration. Place the device between the master and slave devices, with pull-up resistors on both sides. The low quiescent current of 10 µA minimizes power consumption in battery-powered systems.

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🌐

SPI Interface Translation

The SN74LVC1T45DCKR supports SPI level translation with data rates up to 420 Mbps, covering SPI clock speeds up to 40 MHz. It translates between 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels. The direction pin (DIR) controls data flow, making it suitable for half-duplex SPI buses. The device's low propagation delay of 3.3 ns ensures minimal signal skew, preserving SPI timing margins.

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📱

Mixed-Voltage Microcontroller Interfacing

The SN74LVC1T45DCKR enables communication between microcontrollers operating at different supply voltages, such as a 1.8 V MCU and a 3.3 V peripheral. Its dual-supply design ensures proper logic levels on both sides. The device supports bidirectional data flow, making it versatile for UART, GPIO, and control signals. The small SC-70 package fits compact PCB layouts.

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Automotive Sensor Interfaces

The SN74LVC1T45DCKR is qualified for automotive applications, operating from -40°C to +125°C. It translates signals between automotive microcontrollers (often 3.3 V or 5 V) and sensors operating at different voltages. The ESD protection of 2000-V HBM ensures robustness in harsh automotive environments. The device's low power consumption is beneficial for always-on systems.

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TMP411-Q1 · Texas Instruments TJA1042 · NXP Semiconductors

🔋

Portable Battery-Powered Devices

The SN74LVC1T45DCKR is ideal for portable devices where power efficiency is critical. Its maximum quiescent current of 10 µA minimizes battery drain. The device supports voltage translation between 1.8 V and 3.3 V, common in battery-powered systems. The small SC-70 package saves board space, and the wide operating temperature range ensures reliability in various environments.

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TPS7A4700RGWR · Texas Instruments BQ24251RGER · Texas Instruments

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Industrial Control Systems

The SN74LVC1T45DCKR is used in industrial control systems to interface between logic controllers and field devices operating at different voltage levels. Its high data rate and low propagation delay support fast control loops. The device's 3-state outputs allow bus sharing in multi-drop configurations. The wide temperature range and ESD protection make it suitable for harsh industrial environments.

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Recommended Products Summary

What is the operating voltage range of SN74LVC1T45DCKR?

The SN74LVC1T45DCKR operates with two separate supply rails: VCCA from 1.65 V to 5.5 V and VCCB from 1.65 V to 5.5 V. According to the TI datasheet, this dual-supply design allows bidirectional voltage translation between any two logic levels within this range, such as 1.8 V to 3.3 V or 3.3 V to 5 V.

What is the maximum data rate of SN74LVC1T45DCKR?

The SN74LVC1T45DCKR supports data rates up to 420 Mbps. This high-speed capability makes it suitable for fast serial interfaces like SPI and I2C, as well as general-purpose level shifting in high-speed digital systems. The propagation delay is typically 3.3 ns at 3.3 V, ensuring minimal signal skew.

Is SN74LVC1T45DCKR suitable for I2C level shifting?

Yes, the SN74LVC1T45DCKR is suitable for I2C level shifting. It provides bidirectional voltage translation with a data rate of 420 Mbps, far exceeding I2C's standard 400 kbps fast mode. The device's open-drain compatibility and 3-state outputs allow proper bus arbitration, making it a reliable choice for mixed-voltage I2C systems.

What is the difference between SN74LVC1T45DCKR and SN74LVC1T45DPKR?

The SN74LVC1T45DCKR and SN74LVC1T45DPKR are functionally identical, differing only in package type. The DCKR variant uses a 6-pin SC-70 (DCK) package, while the DPKR variant uses a 6-pin SOT-23 (DPK) package. Both offer the same electrical specifications, including 420 Mbps data rate and 1.65 V to 5.5 V supply range, but the SC-70 package is smaller, making it preferable for space-constrained designs.

Can SN74LVC1T45DCKR be used for automotive applications?

Yes, the SN74LVC1T45DCKR is qualified for automotive applications. According to the TI product page, it operates over the full -40°C to +125°C temperature range and meets AEC-Q100 standards. This makes it suitable for automotive electronics such as ECU interfaces, sensor signal conditioning, and in-vehicle networking.

What is the price of SN74LVC1T45DCKR?

As of 2026-08-26, the SN74LVC1T45DCKR is priced at approximately $0.45 for single-unit quantities, decreasing to $0.19 at 1000 units. Prices may vary by distributor and order volume. For the most current pricing and availability, check DigiKey, Mouser, or Arrow Electronics.

Where can I buy SN74LVC1T45DCKR online?

The SN74LVC1T45DCKR is available from major distributors including DigiKey, Mouser, and Arrow Electronics. You can order directly from their websites, and it is typically in stock with same-day shipping. For bulk orders, contact TI directly or use their authorized distributor network.

What is the lead time for SN74LVC1T45DCKR?

The lead time for SN74LVC1T45DCKR is typically 1-2 weeks for standard orders, but it can vary based on distributor stock and order quantity. As of 2026-08-26, DigiKey and Mouser list it as in stock, so immediate shipment is possible for small quantities. For larger volumes, check with your distributor for current lead times.

Is SN74LVC1T45DCKR in stock?

As of 2026-08-26, the SN74LVC1T45DCKR is in stock at major distributors like DigiKey and Mouser. Availability can change rapidly, so it is recommended to check the distributor websites for real-time inventory status. Arrow Electronics also lists it as available for immediate order.

What is the best drop-in replacement for SN74LVC1T45DCKR?

The best drop-in replacement for SN74LVC1T45DCKR is the SN74LVC1T45DCKT, which is the same device in tape-and-reel packaging with identical electrical specifications and pinout. For a cross-brand alternative, the NTS0101DP from NXP is pin-compatible and offers similar performance, but verify the pinout before production use.

Can SN74LVC1T45DCKR replace SN74LVC1T45DPKR?

Yes, the SN74LVC1T45DCKR can replace the SN74LVC1T45DPKR if the PCB footprint is compatible. Both are functionally identical, but the DCKR uses a smaller SC-70 package, so the DPKR's SOT-23 footprint will not match. You would need to redesign the PCB to use the DCKR variant.

Where can I download the SN74LVC1T45DCKR datasheet PDF?

The SN74LVC1T45DCKR datasheet PDF is available for download from the Texas Instruments website at https://www.ti.com/lit/ds/symlink/sn74lvc1t45.pdf. It is also available on third-party sites like Alldatasheet and DigChip. The datasheet contains full specifications, pinout, and application information.

What are the key specifications of SN74LVC1T45DCKR that engineers should know?

The SN74LVC1T45DCKR is a single-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. Key specs include a supply voltage range of 1.65 V to 5.5 V on both VCCA and VCCB, a data rate of 420 Mbps, propagation delay of 3.3 ns at 3.3 V, and output drive of ±24 mA. It operates from -40°C to +125°C and comes in a 6-pin SC-70 package.

What is the best NXP equivalent for SN74LVC1T45DCKR?

The best NXP equivalent for SN74LVC1T45DCKR is the NTS0101DP, which is a single-bit dual-supply level translator in a 6-pin TSSOP package. It offers similar voltage range (1.65 V to 5.5 V) and data rate (up to 420 Mbps), but the package is different, so it is not a drop-in replacement. Verify pin compatibility before use.

Hey Google, what can replace SN74LVC1T45DCKR?

The SN74LVC1T45DCKR can be replaced by the SN74LVC1T45DCKT (same device, tape-and-reel), SN74LVC1T45DPKR (same function, different package), or the NTS0101DP from NXP (cross-brand, but different package). For a drop-in replacement, choose the DCKT variant. Always verify pinout and electrical compatibility before substitution.

Engineering reference data for SN74LVC1T45DCKR — comparison, design guidance, and compliance information.

Selection Guide

Choose the SN74LVC1T45DCKR when you need a single-bit, bidirectional level translator with high data rate (420 Mbps) and wide supply range (1.65 V to 5.5 V) in a small SC-70 package. It is ideal for I2C, SPI, and general-purpose mixed-voltage interfacing. If you need a drop-in replacement with identical specs, select the SN74LVC1T45DCKT (same package, tape-and-reel). For a different package option, consider the SN74LVC1T45DPKR (SOT-23) or SN74LVC1T45DBVR (SOT-23), but note they are not pin-compatible. For a cross-brand alternative, the NTS0101DP from NXP offers similar performance but in a TSSOP-6 package, requiring PCB redesign. If you need a 2-bit translator, the TXS0102DCUR is an option but with lower data rate and voltage range. For automotive applications, the SN74LVC1T45DCKR is preferred due to its AEC-Q100 qualification.

Comparison with Alternatives

Parameter	This Product	SN74LVC1T45DCKT	SN74LVC1T45DPKR	SN74LVC1T45DBVR	NTS0101DP	TXS0102DCUR
Package	SC-70-6 (DCK)	SC-70-6 (DCK) - same	SOT-23-6 (DPK) - different	SOT-23-6 (DBV) - different	TSSOP-6 - different	VSSOP-8 - different
Brand	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	NXP Semiconductors	Texas Instruments
Number of Channels	1	1	1	1	1	2
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	1.65 V to 5.5 V	1.65 V to 3.6 V
Data Rate	420 Mbps	420 Mbps	420 Mbps	420 Mbps	420 Mbps	24 Mbps
Propagation Delay (tpd)	3.3 ns at 3.3 V	3.3 ns at 3.3 V	3.3 ns at 3.3 V	3.3 ns at 3.3 V	[DATA_NEEDED]	1.5 ns at 3.3 V
Output Drive	±24 mA at 3.3 V	±24 mA at 3.3 V	±24 mA at 3.3 V	±24 mA at 3.3 V	[DATA_NEEDED]	±50 µA
Operating Temperature	-40°C to +125°C	-40°C to +125°C	-40°C to +125°C	-40°C to +125°C	-40°C to +125°C	-40°C to +85°C

Key Differentiators

Higher data rate than many level translators (vs TXS0102DCUR)
Wider supply voltage range (vs TXS0102DCUR)
Automotive qualification (vs NTS0101DP)

Design Notes

Ensure both VCCA and VCCB are powered and within their specified ranges (1.65 V to 5.5 V). The device does not have an undervoltage lockout, so if one supply is off, the outputs may be undefined. Use decoupling capacitors (0.1 µF) on each supply pin close to the device to maintain stable operation.

Place the SN74LVC1T45DCKR close to the interface connector or the low-voltage device to minimize trace length and reduce signal integrity issues. Keep the traces for A and B ports short and matched in length to avoid skew. Use a solid ground plane to provide a low-impedance return path.

Do not leave the DIR or OE pins floating. Tie DIR to a valid logic level (VCCA or GND) and OE to GND for normal operation. Floating control pins can cause excessive current draw and unpredictable behavior. Also, ensure that the input voltage on any pin does not exceed 5.5 V, even when the device is unpowered, to avoid damage.