SN74LVC1T45QDCKRQ1 - Auto Dual-Supply Level Translator | TI
MPN: SN74LVC1T45QDCKRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.55 | $5.50 |
| 100 | $0.42 | $42.00 |
| 500 | $0.36 | $180.00 |
| 1,000 | $0.29 | $290.00 |
Drop-in alternatives for SN74LVC1T45QDCKRQ1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74LVC1T45DCKR
β Drop-Inβ In Stock
$0.084 / Unit
View Datasheet β74LVC1T45GV,125
β Drop-Inπ Reference alternative (not in catalog)
74LVC1T45W6-7
β Drop-Inπ Reference alternative (not in catalog)
NLV74LVC1T45
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC1T45QDCKRQ1 Maximum Ratings & Electrical Characteristics
| Function | Single-bit noninverting dual-supply bus transceiver (level translator) |
| Supply Voltage VCCA | 1.65 V to 5.5 V |
| Supply Voltage VCCB | 1.65 V to 5.5 V |
| Max Propagation Delay | 3.3 ns at 3.3 V |
| Max Data Rate | 420 Mbps |
| Output Drive | +/-24 mA at 3.3 V |
| Max ICC | 10 uA |
| Input Tolerance | 5.5 V max |
| Partial Power Down (Ioff) | Yes |
| Technology | CMOS (LVC) |
| Automotive Qualification | AEC-Q100 qualified |
| Operating Temperature | -40C to +125C |
| Package | SC-70-6 (DCK) |
| Pins | 6 |
| Mounting Type | Surface Mount |
| Output Type | 3-state |
SN74LVC1T45QDCKRQ1 Pin Configuration
| Pin 1 | VCCA β A-port supply, 1.65 V to 5.5 V |
| Pin 2 | A β Data input/output, A-port (tracks VCCA) |
| Pin 3 | GND β Ground |
| Pin 4 | B β Data input/output, B-port (tracks VCCB) |
| Pin 5 | DIR β Direction control input |
| Pin 6 | VCCB β B-port supply, 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
SN74LVC1T45QDCKRQ1 is suitable for 6 applications: Automotive Body Control Module GPIO Translation, SPI/UART Level Shifting Between 1.8V Sensor and 3.3V MCU, Infotainment and Cluster Display Interfaces, CAN/LIN Transceiver Logic-Side Interfacing, Power and Battery Management System Communication, Isolated Gate Driver and Motor Control Signal Chains.
Automotive Body Control Module GPIO Translation
In body control modules, MCUs running at 3.3 V must drive 5 V loads and read 5 V sensor outputs. The SN74LVC1T45QDCKRQ1 provides one-channel bidirectional translation with +/-24 mA drive at 3.3 V, enough to swing discrete signals robustly. Its AEC-Q100 qualification and -40C to +125C rating cover under-hood and interior module environments. Because Ioff partial-power-down is supported, load-switched 5 V rails can be sequenced arbitrarily without damaging the 3.3 V domain.
Recommended
SPI/UART Level Shifting Between 1.8V Sensor and 3.3V MCU
Many modern sensors (IMUs, pressure sensors) operate at 1.8 V while host MCUs run at 3.3 V. The SN74LVC1T45QDCKRQ1 translates one signal per device with a 3.3 ns maximum propagation delay and up to 420 Mbps data rate, comfortably supporting SPI clocks at 10-20 MHz and fast UART. Using one SC-70-6 translator per signal keeps routing clean on dense boards. Note that a device is needed per unidirectional line since the DIR pin sets a single direction per device.
Recommended
Infotainment and Cluster Display Interfaces
Automotive displays and audio processors mix 1.8 V core-domain I/O with 3.3 V and 5 V peripheral rails. The SN74LVC1T45QDCKRQ1's 420 Mbps bandwidth supports high-speed serial control and back-channel signals, while 10 uA maximum ICC keeps quiescent draw negligible during sleep modes - important for battery drain compliance. The small SC-70-6 footprint fits tight display connector areas. Pair each translator rail with 100 nF local decoupling to preserve signal integrity at speed.
Recommended
CAN/LIN Transceiver Logic-Side Interfacing
CAN and LIN transceivers such as the TCAN337G-Q1 often present 5 V-tolerant or 3.3 V logic inputs that must match the MCU domain. The SN74LVC1T45QDCKRQ1 bridges the MCU TX/RX lines to the transceiver logic pins with only 3.3 ns delay, preserving CAN bit timing budgets even at 500 kbps with arbitration margins. Its Β±24 mA drive ensures solid edges on longer PCB runs, and AEC-Q100 qualification matches transceiver-grade reliability expectations.
Recommended
Power and Battery Management System Communication
Battery management ICs like the BQ76952Q-Q1 and fuel gauges often use lower-voltage I2C/SMBus domains than the host. The SN74LVC1T45QDCKRQ1 translates one line per device (SDA and SCL need two translators), and the Ioff feature prevents back-feeding the gauge when the pack is in ship mode. The 10 uA max ICC plus 3-state Hi-Z outputs keep leakage to the battery stack negligible during storage, protecting cell longevity and warranty targets.
Recommended
Isolated Gate Driver and Motor Control Signal Chains
In traction inverters and motor drives, isolated gate drivers (e.g., UCC21520Q-Q1) and current sensors (TMCS1101-Q1) present input/output logic at different voltages than the DSP (TMS320F28004x). The SN74LVC1T45QDCKRQ1 shifts PWM and fault-feedback lines with sub-5 ns delay, preserving dead-time accuracy at 20-100 kHz switching frequencies. The -40C to +125C rating and Β±24 mA drive ensure reliable signaling across the full automotive ambient range.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC1T45QDCKRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC1T45DCKR | 74LVC1T45GV,125 | 74LVC1T45W6-7 | NLV74LVC1T45 |
|---|---|---|---|---|---|
| Package | SC-70-6 (DCK) | SC-70-6 (DCK) - same | SC-88A/SOT-363 (SC-70-6 footprint) - same | SOT-26 (SC-70-6 footprint) - same | SC-70-6 (SOT-363) - same |
| Brand | Texas Instruments | Texas Instruments | NXP Semiconductors | Diodes Incorporated | onsemi |
| Supply Range (each rail) | 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 |
| Automotive AEC-Q100 | Yes (-40C to +125C) | No (standard grade) | [DATA_NEEDED] | No (industrial) | [DATA_NEEDED] |
| Output Drive | +/-24 mA at 3.3 V | +/-24 mA at 3.3 V | +/-24 mA (typical LVC1T45) | [DATA_NEEDED] | [DATA_NEEDED] |
| Max Data Rate | 420 Mbps | 420 Mbps | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Ioff Partial Power Down | Yes | Yes | Yes | Yes | Yes |
| Price (1 pc, as of 2026-08-29) | $0.62 | $0.25 [DATA_NEEDED exact] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- AEC-Q100 automotive qualification (vs SN74LVC1T45DCKR)
- 420 Mbps bandwidth with 3.3 ns max tpd (vs 74LVC1T45W6-7)
- Trade-off: not suitable for I2C (vs TXS0102-Q1)
Design Notes
Place 100 nF ceramic decoupling capacitors within 2 mm of both VCCA (pin 1) and VCCB (pin 6), each connected to pin 3 GND. Because each port switches at up to 420 Mbps, inadequate local decoupling causes ground bounce that corrupts adjacent signals. The SC-70-6 exposed layout needs no thermal pad; a standard SOT-363 land pattern per IPC-7351 suffices.
Remember that the 74LVC1T45 is a directional device: the DIR pin fixes which port is input and which is output per the datasheet truth table. For push-pull bidirectional protocols such as I2C, this part is NOT suitable because DIR cannot change dynamically; use the TI TXS0102-Q1 or LSF0102-Q1 open-drain translators instead. For SPI/UART, use one device per line with static DIR.
Both VCCA and VCCB must be within 1.65 V to 5.5 V for valid translation; with a rail down, outputs go 3-state (Hi-Z) via Ioff protection. Sequence-independent operation is supported, but for lowest glitches power VCCA first when translating toward the lower-voltage domain. Max 10 uA ICC makes this part ideal for always-on or sleep-mode rails.
Do not confuse the automotive Q1 (DCKRQ1 reel) with the standard SN74LVC1T45DCKR in automotive BOMs - although functionally identical, procurement and traceability requirements (AEC-Q100 certificates) apply only to the Q1 suffix. Also verify cross-brand equivalents pin-to-pin: SOT-26/SOT-363 land patterns are dimensionally compatible but pin functions may map differently on some vendors.
Compliance Information
AEC-Q100 qualified per TI product page (Q1 suffix). RoHS/lead-free per standard TI current production; REACH and halogen details not stated in provided data.
