My Inquiry
My Account
Texas Instruments 74AVCH1T45DCKRG4
- Part No.:
- 74AVCH1T45DCKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVCH1T45DCKRG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,257
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AVCH1T45DCKRG4 from Texas Instruments is a single-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V–3.6V domains (e.g., 1.8V ↔ 3.3V), with 3-state outputs, bus-hold circuitry, and Ioff partial-power-down support. It operates across –40°C to 85°C and delivers up to 500Mbps data rate in 1.8V-to-3.3V translation.
For engineers reviewing the 74AVCH1T45DCKRG4 datasheet, 74AVCH1T45DCKRG4 pinout, 74AVCH1T45DCKRG4 application, or 74AVCH1T45DCKRG4 equivalent, key selection criteria include VCCA/VCCB supply independence, DIR input referenced to VCCA, 4.6V I/O tolerance, bus-hold elimination of external resistors, and SC70-6 package compatibility with space-constrained PCB layouts.
Technical Context
The device implements a fully configurable dual-rail architecture where A-port logic levels track VCCA (1.2V–3.6V) and B-port levels track VCCB (1.2V–3.6V), enabling asynchronous bidirectional translation without direction-dependent voltage constraints. DIR control is strictly referenced to VCCA, decoupling direction logic from B-side supply conditions.
VCC isolation forces outputs into high-impedance when either VCCA or VCCB is at GND, while bus-hold maintains valid logic states on undriven A/B inputs-eliminating need for external pull resistors. Ioff circuitry limits leakage to ±5μA during partial power-down, supporting system-level power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 1.2V to 3.6V each - enables translation across 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains |
| Max Data Rate | 500Mbps (1.8V ↔ 3.3V) - supports high-speed interconnect in low-voltage SoC interfaces |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage signals without level-shifting front-end |
| Bus-Hold Current | ±100μA (at VCCA = 3.3V) - actively sustains logic state on floating inputs, removing external bias components |
| Ioff Leakage | ±5μA (VCCA = 0V or VCCB = 0V) - prevents backflow current during partial power-down, protecting powered rails |
| Propagation Delay (A→B) | 0.2ns typical (VCCA = VCCB = 3.3V) - ensures timing-critical signal integrity in high-frequency data paths |
| ESD Rating (HBM) | ±2000V - meets industrial-grade robustness requirements for handling and board assembly |
Pinout & Package
74AVCH1T45DCKRG4 uses the SC70-6 (DCK) package: 2.00mm × 1.25mm body, 0.65mm pitch, 6-pin surface-mount footprint optimized for high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply rail | Reference for A-port I/O and DIR input; sets VIH/VIL thresholds for direction control |
| GND | Ground reference | Common return path for both supply domains; required for stable bus-hold and Ioff operation |
| A | Bidirectional I/O (A side) | Data terminal referenced to VCCA; supports 4.6V tolerance and bus-hold functionality |
| VCCB | B-port supply rail | Reference for B-port I/O only; independent of VCCA, enabling asymmetric voltage translation |
| DIR | Direction control input | Logic level referenced to VCCA; high = A→B, low = B→A; no internal pullup/pulldown required |
| B | Bidirectional I/O (B side) | Data terminal referenced to VCCB; supports 4.6V tolerance and bus-hold functionality |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2V–3.6V supplies on A and B ports enable flexible interface bridging without external regulators |
| Integrated bus-hold | Eliminates need for external pullup/pulldown resistors on A/B lines, reducing BOM count and layout area |
| VCC isolation | Outputs enter high-Z if either VCCA or VCCB is grounded - prevents contention during power sequencing |
| Ioff partial-power-down | Blocks current flow between powered/unpowered rails, enabling safe hot-swap and low-power standby modes |
| SC70-6 NanoStar™ package | 2.00mm × 1.25mm footprint supports miniaturized designs in portable and wearable electronics |
Applications
| Mobile Processor Interfacing | Industrial Sensor Hub |
|---|---|
Use Scenario: Connecting a 1.8V application processor GPIO bank to a 3.3V legacy peripheral interface. IC Role / Device Role / Timing Role: Bidirectional level translator managing data flow direction via processor-controlled DIR signal. Use Value: Enables direct integration without discrete FET translators or voltage dividers, reducing component count and signal skew. | Use Scenario: Isolating a 1.2V microcontroller I²C bus from multiple 2.5V analog sensor modules in a factory-floor data acquisition node. IC Role / Device Role / Timing Role: Voltage-translating I/O buffer with bus-hold maintaining valid logic during sensor power cycling. Use Value: Prevents bus lock-up during sensor startup/shutdown and eliminates external pull resistors on all sensor lines. |
| Enterprise SSD Controller Interface | Telecom Baseband FPGA Link |
Use Scenario: Bridging a 1.5V NVMe controller's command/status lines to a 3.3V PCIe PHY management interface. IC Role / Device Role / Timing Role: Low-latency, 3-state transceiver enabling shared control bus access with precise timing control. Use Value: Delivers sub-3ns propagation delay at 1.5V/3.3V translation, meeting tight setup/hold margins for PCIe register access. | Use Scenario: Level-shifting configuration signals between a 2.5V FPGA I/O bank and a 1.8V RF transceiver ASIC in a 5G small cell radio. IC Role / Device Role / Timing Role: Dual-supply translator with Ioff ensuring no current injection into unpowered RF section during FPGA reconfiguration. Use Value: Supports safe hot-reconfiguration of FPGA logic while RF subsystem remains powered down or in reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1T45DCKR | Single-supply (1.65V–5.5V), no dual-rail capability; DIR referenced to VCC; no bus-hold | Requires matched VCC for both sides; unsuitable for asymmetric voltage translation or floating-bus scenarios | Select when only single-rail translation is needed and external pull resistors are acceptable |
| TXS0101DCKR | Auto-direction sensing (no DIR pin); lower drive strength (±2mA vs ±12mA); no Ioff | Eliminates direction-control wiring but lacks power-down isolation; not suitable for partial-power-down systems | Select for simple push-pull buses where direction is data-driven and full power-down isn't required |
Compared with SN74LVC1T45DCKR and TXS0101DCKR, the 74AVCH1T45DCKRG4 uniquely combines dual-rail flexibility, bus-hold, Ioff, and 500Mbps performance - making it the only option for robust, low-component-count translation in mixed-voltage, power-gated embedded systems.
Availability
74AVCH1T45DCKRG4 is available at Aetrix Electronics and suitable for mobile processor interfacing, industrial sensor hubs, enterprise SSD controllers, and telecom baseband FPGA links requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature and voltage corners.
Supply support for 74AVCH1T45DCKRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in high-reliability IC design and manufacturing.
The SN74AVCH1T45 belongs to TI's AVC logic family, engineered specifically for low-voltage, high-speed bidirectional level translation in space-constrained, power-sensitive applications such as portable computing and industrial IoT edge nodes.
FAQ
What voltage ranges does the 74AVCH1T45DCKRG4 support on its A and B ports?
The 74AVCH1T45DCKRG4 supports independent supply voltages from 1.2V to 3.6V on both VCCA and VCCB. This enables translation between any combination of 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains - for example, 1.8V A-port to 3.3V B-port or vice versa. The DIR input is always referenced to VCCA, not VCCB.
Does the 74AVCH1T45DCKRG4 require external pullup or pulldown resistors on its A and B pins?
No. The 74AVCH1T45DCKRG4 integrates active bus-hold circuitry on both A and B I/O pins, which maintains valid logic states on undriven or floating inputs. TI explicitly advises against using external pull resistors with this feature - doing so may interfere with bus-hold operation and degrade noise immunity.
How does the 74AVCH1T45DCKRG4 behave when one supply rail is powered down?
When either VCCA or VCCB is at GND, the 74AVCH1T45DCKRG4 activates VCC isolation: all outputs enter high-impedance state regardless of DIR or input states. Bus-hold remains active on the powered side, preventing floating nodes. This behavior is critical for safe power sequencing in multi-rail systems.
What is the maximum data rate supported by the 74AVCH1T45DCKRG4 in common voltage translations?
The 74AVCH1T45DCKRG4 achieves up to 500Mbps in 1.8V ↔ 3.3V translation, 320Mbps for <1.8V ↔ 3.3V or ↔ 2.5V/1.8V, 280Mbps ↔ 1.5V, and 240Mbps ↔ 1.2V. These rates reflect guaranteed timing performance under recommended operating conditions, not theoretical limits.
Is the 74AVCH1T45DCKRG4 compatible with the SC70-6 (DCK) package footprint used by other TI logic devices?
Yes. The 74AVCH1T45DCKRG4 uses the standardized SC70-6 (DCK) package: 2.00mm × 1.25mm body, 0.65mm lead pitch, and identical pad layout to TI's SN74LVC1T45DCKR and SN74AUP1T45DCKR. This enables drop-in replacement in existing SC70-6 layouts - provided voltage and feature requirements align.
74AVCH1T45DCKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCH
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.2 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 380Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP, SC-88, SOT-363
74AVCH1T45DCKRG4 FAQ
1.How can I place an order for 74AVCH1T45DCKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVCH1T45DCKRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74AVCH1T45DCKRG4 reliable?
The price and inventory of 74AVCH1T45DCKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCH1T45DCKRG4 is usually 5 days.
3.What payment methods are accepted for 74AVCH1T45DCKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCH1T45DCKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVCH1T45DCKRG4?
74AVCH1T45DCKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVCH1T45DCKRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74AVCH1T45DCKRG4?
For technical support, including 74AVCH1T45DCKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCH1T45DCKRG4 requirements.
6.How does Aetrix verify that 74AVCH1T45DCKRG4 is sourced from the original manufacturer or authorized distributors?
All 74AVCH1T45DCKRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74AVCH1T45DCKRG4 meets industry standards.
7.What is the process for return or replacement of 74AVCH1T45DCKRG4?
All 74AVCH1T45DCKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCH1T45DCKRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74AVCH1T45DCKRG4 part is unused and in its original packaging.
Return procedure for 74AVCH1T45DCKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AVCH1T45DCKRG4 Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
