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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Texas Instruments SN74AVCH2T45YZPR

Name: SN74AVCH2T45YZPR
Brand: Texas Instruments
SKU: SN74AVCH2T45YZPR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AVCH2T45YZPR

Manufacturer:: Texas Instruments

Category:: Translators, Level Shifters

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Datasheet:: SN74AVCH2T45YZPR.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 8DSBGA

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Product details

Overview

SN74AVCH2T45YZPR from Texas Instruments is a 2-bit, dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.2V–3.6V domains (e.g., 1.8V ↔ 3.3V), with 3-state outputs, active bus-hold on all data inputs, and I_off partial power-down protection. It operates in smartphones and portable computing systems where mixed-voltage interconnects require low-latency, low-power signal integrity.

For engineers reviewing the SN74AVCH2T45YZPR datasheet, SN74AVCH2T45YZPR pinout, SN74AVCH2T45YZPR application, or SN74AVCH2T45YZPR equivalent, key selection criteria include its 4.6V I/O tolerance, V_CCA/V_CCB isolation behavior, DIR-controlled directionality, NanoFree DSBGA-8 package footprint (1.89 mm × 0.89 mm), and guaranteed 240–500 Mbps data rates across voltage combinations.

Technical Context

The SN74AVCH2T45YZPR implements a true 2-rail architecture: A-port logic levels track V_CCA (1.2V–3.6V), B-port levels track V_CCB (1.2V–3.6V), and DIR is referenced to V_CCA. Direction control is asynchronous-no clock required-and output enable/disable is implicit via DIR state, not a separate OE pin.

V_CC isolation ensures both ports enter high-impedance when either V_CCA or V_CCB = GND; I_off limits backflow current to ±5 µA per rail during partial power-down; bus-hold sustains un-driven A1/A2/B1/B2 at valid logic states without external resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range (V_CCA, V_CCB)	1.2V to 3.6V each - enables universal level-shifting among 1.2V/1.5V/1.8V/2.5V/3.3V nodes
I/O Voltage Tolerance	4.6V - allows safe interfacing with higher-voltage peripherals without clamping diodes
Max Data Rate	500 Mbps (1.8V→3.3V) - supports high-speed memory or interface bridging in compact devices
Propagation Delay (t_PLH/t_PHL)	2.2 ns typical (V_CCA=3.3V, V_CCB=3.3V) - ensures sub-nanosecond timing margin for 450+ MHz buses
I_off Current	±5 µA max - prevents damaging back-current during hot-swap or rail sequencing
Bus-Hold Strength	IBHL ≥ 25 µA (low), IBHH ≥ –25 µA (high) - eliminates need for external pull resistors on floating lines
ESD Rating (HBM)	±8 kV - meets industrial-grade robustness requirements for handheld and embedded assembly

Pinout & Package

SN74AVCH2T45YZPR uses the YZP package: 8-pin DSBGA (Die Size Ball Grid Array), 1.89 mm × 0.89 mm, bottom-terminal layout with 0.4 mm pitch. This NanoFree™ package eliminates traditional leadframe and mold compound, reducing parasitic inductance and thermal resistance (R_θJA = 105.8°C/W).

Pin/Terminal	Circuit Role	Design Meaning
VCCA	Supply for A-side I/Os and DIR input	Powers A1, A2, and DIR; defines A-port logic thresholds and output swing
VCCB	Supply for B-side I/Os	Powers B1, B2; defines B-port logic thresholds and output swing
GND	Reference ground	Common return path for both supply rails; required for stable bus-hold operation
A1, A2	Bidirectional data I/O (A port)	Driven by VCCA; accept inputs referenced to VCCA; support bus-hold when floating
B1, B2	Bidirectional data I/O (B port)	Driven by VCCB; accept inputs referenced to VCCB; support bus-hold when floating
DIR	Direction control input	Referenced to VCCA; low = B→A data flow, high = A→B data flow; no internal pull-up/down

Key Features

Feature	Design Value
Configurable dual-supply rails	Independent VCCA and VCCB (1.2V–3.6V) enable arbitrary low-voltage node translation without external regulators
VCC isolation	Automatic Hi-Z on both ports if either VCCA or VCCB = GND - prevents false logic injection during power sequencing
Active bus-hold circuitry	Holds A1/A2/B1/B2 at valid logic states without external resistors - reduces BOM count and PCB area
Partial power-down (Ioff)	Blocks back-current flow when one rail is powered off - critical for hot-plug and dynamic power gating
NanoFree™ DSBGA package	Dies-as-package construction minimizes size (1.89 × 0.89 mm) and thermal resistance - ideal for space-constrained mobile designs

Applications

Smartphone Baseband–Application Processor Interface	Server Memory Subsystem Bridging
Use Scenario: Interfacing 1.2V LPDDR4 memory controller with 1.8V I/O buffer in ultra-thin smartphone SoC design. IC Role / Device Role / Timing Role: Bidirectional level shifter translating command/address/data between voltage domains while maintaining <2.5 ns propagation delay. Use Value: Eliminates discrete resistor networks and saves >0.5 mm² PCB area per channel using NanoFree YZP package.	Use Scenario: Connecting 1.5V DDR4 register clock driver to 3.3V system management controller in 1U rack server DIMM slot. IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling reliable control signal translation under varying thermal load and rail sequencing. Use Value: VCC isolation prevents erroneous reset assertion during VCCB ramp-up before VCCA stabilization.
Notebook Platform Controller Hub (PCH)–EC Communication	Industrial IoT Sensor Hub Interface
Use Scenario: Level-shifting SMBus signals between 3.3V PCH and 1.8V embedded controller in fanless notebook platform. IC Role / Device Role / Timing Role: 2-bit bidirectional translator with bus-hold maintaining valid logic during EC sleep/wake transitions. Use Value: I_off ≤ ±5 µA ensures no current leakage into powered-down EC rail during suspend mode.	Use Scenario: Bridging 2.5V industrial sensor ADC outputs to 1.2V microcontroller inputs in battery-powered edge node. IC Role / Device Role / Timing Role: Low-power voltage translator supporting 240 Mbps operation at 1.2V–2.5V shift with ESD-hardened I/O. Use Value: 4.6V I/O tolerance accommodates transient overshoot on noisy factory-floor sensor lines without damage.

Smartphone Baseband–Application Processor Interface

Server Memory Subsystem Bridging

Use Scenario: Interfacing 1.2V LPDDR4 memory controller with 1.8V I/O buffer in ultra-thin smartphone SoC design.

IC Role / Device Role / Timing Role: Bidirectional level shifter translating command/address/data between voltage domains while maintaining <2.5 ns propagation delay.

Use Value: Eliminates discrete resistor networks and saves >0.5 mm² PCB area per channel using NanoFree YZP package.

Use Scenario: Connecting 1.5V DDR4 register clock driver to 3.3V system management controller in 1U rack server DIMM slot.

IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling reliable control signal translation under varying thermal load and rail sequencing.

Use Value: VCC isolation prevents erroneous reset assertion during VCCB ramp-up before VCCA stabilization.

Notebook Platform Controller Hub (PCH)–EC Communication

Industrial IoT Sensor Hub Interface

Use Scenario: Level-shifting SMBus signals between 3.3V PCH and 1.8V embedded controller in fanless notebook platform.

IC Role / Device Role / Timing Role: 2-bit bidirectional translator with bus-hold maintaining valid logic during EC sleep/wake transitions.

Use Value: I_off ≤ ±5 µA ensures no current leakage into powered-down EC rail during suspend mode.

Use Scenario: Bridging 2.5V industrial sensor ADC outputs to 1.2V microcontroller inputs in battery-powered edge node.

IC Role / Device Role / Timing Role: Low-power voltage translator supporting 240 Mbps operation at 1.2V–2.5V shift with ESD-hardened I/O.

Use Value: 4.6V I/O tolerance accommodates transient overshoot on noisy factory-floor sensor lines without damage.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVC2T245YZPR	Same YZP package, identical pinout, but includes dedicated OE pin for explicit 3-state control	Required where system-level software must independently gate transceiver outputs regardless of DIR state	Select SN74AVC2T245YZPR only if OE functionality is needed; SN74AVCH2T45YZPR offers simpler control with DIR-only operation
TXS0102DCUR	Auto-direction sensing (no DIR pin); lower drive strength (±8 mA vs ±12 mA); different DSBGA-10 package	Suitable for I²C/SMBus where direction is inferred from bus activity, not controlled externally	Choose TXS0102DCUR for self-clocking protocols; SN74AVCH2T45YZPR is preferred for synchronous, DIR-driven interfaces like memory or parallel buses

Compared with SN74AVC2T245YZPR and TXS0102DCUR, SN74AVCH2T45YZPR delivers deterministic DIR-based direction control, highest drive strength (±12 mA), and smallest footprint (DSBGA-8), making it optimal for space-constrained, high-speed, explicitly controlled bidirectional links.

Availability

SN74AVCH2T45YZPR is available at Aetrix Electronics and suitable for smartphone baseband interfaces, server memory subsystems, notebook PCH–EC communication, and industrial sensor hubs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SN74AVCH2T45YZPR 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in low-power, high-reliability interface solutions.

SN74AVCH2T45YZPR belongs to TI's AVC/AVCH family of voltage-translating transceivers, designed specifically for compact, multi-rail digital systems where board space, power efficiency, and mixed-voltage interoperability are critical.

FAQ

What is the function of the DIR pin on the SN74AVCH2T45YZPR?

The DIR pin on the SN74AVCH2T45YZPR controls data direction: when DIR is low (≤ V_CCA × 0.35), data flows from B-port to A-port; when high (≥ V_CCA × 0.65), data flows from A-port to B-port. It is referenced to V_CCA, requires no external pull-up/down, and enables fully asynchronous bidirectional translation without an OE pin. This behavior is confirmed in the functional table and timing diagrams of the SN74AVCH2T45YZPR datasheet.

Does the SN74AVCH2T45YZPR support level-shifting between 1.2V and 3.3V?

Yes, the SN74AVCH2T45YZPR supports bidirectional level-shifting between 1.2V and 3.3V: V_CCA can be set to 1.2V while V_CCB is 3.3V (or vice versa). Its 2-rail architecture and 4.6V I/O tolerance ensure safe operation, and switching characteristics confirm 240 Mbps performance in this configuration. This capability is explicitly validated in Section 5.6–5.10 of the SN74AVCH2T45YZPR datasheet.

Can the SN74AVCH2T45YZPR be used without external pull-up or pull-down resistors?

Yes, the SN74AVCH2T45YZPR integrates active bus-hold circuitry on all data I/Os (A1, A2, B1, B2), which maintains unused or un-driven inputs at valid logic states without external resistors. TI explicitly advises against adding pull resistors with this feature. Bus-hold current specifications (IBHL/IBHH) are provided in Section 5.5 of the SN74AVCH2T45YZPR datasheet.

What happens to the outputs of the SN74AVCH2T45YZPR if VCCA = GND but VCCB is powered?

If VCCA = GND while VCCB is powered, the SN74AVCH2T45YZPR activates VCC isolation: both A-port and B-port outputs enter high-impedance state regardless of DIR or input states. This prevents false logic from propagating and is guaranteed by the IOZ specification (±5 µA max) in Section 5.5 of the SN74AVCH2T45YZPR datasheet.

Is the SN74AVCH2T45YZPR compatible with the SN74AVC2T245YZPR in the same PCB footprint?

No, the SN74AVCH2T45YZPR and SN74AVC2T245YZPR share the same YZP-8 package and pinout (including identical ball map), making them mechanically and electrically drop-in compatible. Both use DSBGA-8 with 0.4 mm pitch and match pin-for-pin: VCCA, A1, A2, GND, DIR, B2, B1, VCCB. This compatibility is confirmed in TI's official package drawings and orderable part documentation for SN74AVCH2T45YZPR.

SN74AVCH2T45YZPR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AVCH

Package/Case:

Packaging:: Tape & Reel (TR)

Product Status:: Active

Translator Type:: Voltage Level

Channel Type:: Bidirectional

Number of Circuits:: 1

Channels per Circuit:: 2

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:: 500Mbps

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-XFBGA, DSBGA

SN74AVCH2T45YZPR FAQ

1.How can I place an order for SN74AVCH2T45YZPR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AVCH2T45YZPR 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 SN74AVCH2T45YZPR reliable?

The price and inventory of SN74AVCH2T45YZPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCH2T45YZPR is usually 5 days.

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Once your SN74AVCH2T45YZPR 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 SN74AVCH2T45YZPR?

For technical support, including SN74AVCH2T45YZPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCH2T45YZPR requirements.

6.How does Aetrix verify that SN74AVCH2T45YZPR is sourced from the original manufacturer or authorized distributors?

All SN74AVCH2T45YZPR 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 SN74AVCH2T45YZPR meets industry standards.

7.What is the process for return or replacement of SN74AVCH2T45YZPR?

All SN74AVCH2T45YZPR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCH2T45YZPR, 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 SN74AVCH2T45YZPR part is unused and in its original packaging.

Return procedure for SN74AVCH2T45YZPR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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