Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

STMicroelectronics 74VCX1632245TBR

Name: 74VCX1632245TBR
Brand: STMicroelectronics
SKU: 74VCX1632245TBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 74VCX1632245TBR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 42-TFBGA

Datasheet:: 74VCX1632245TBR.pdf

Description:: IC TRANSCEIVER 42TFBGA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,314

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

74VCX1632245TBR from STMicroelectronics is a dual-supply 16-bit bus transceiver and level translator designed for bidirectional voltage translation between 3.3V/2.5V/1.8V buses. It features 4.4ns max propagation delay at TA=85°C, 20µA max quiescent current per supply, and integrated 26Ω series resistors on A-side outputs. Used in mixed-voltage memory subsystems and FPGA I/O bridging.

For engineers reviewing the 74VCX1632245TBR datasheet, 74VCX1632245TBR pinout, 74VCX1632245TBR application, or 74VCX1632245TBR equivalent, key selection criteria include asymmetric VCCA (2.3–3.6V) and VCCB (1.65–2.7V) operating ranges, 380 Mbps max data rate for 1.8V↔3.3V translation, and power-down protection on all I/Os during disable.

Technical Context

This device implements two independent 8-bit transceivers (1A↔1B and 2A↔2B), each controlled by dedicated nDIR and nG inputs. Direction control is asynchronous and edge-independent; data flows bidirectionally based solely on nDIR logic state while nG is low.

It uses C2MOS sub-micron technology with five-layer metal interconnect to achieve balanced tPLH/tPHL delays and symmetrical output drive (8mA min at VCCA=3.0V/VCCB=1.65V). The A-side includes integrated 26Ω series termination to reduce signal reflections on high-speed traces.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay	4.4ns max (tPD) at VCCA=3.0V, VCCB=2.3V, TA=85°C - enables ≤227MHz clocked operation
Voltage Ranges	VCCA = 2.3–3.6V; VCCB = 1.65–2.7V - supports 3.3V↔2.5V, 3.3V↔1.8V, and 2.5V↔1.8V translation
Output Drive	\|IOHA\| = \|IOLA\| = 8mA min at VCCA=3.0V/VCCB=1.65V - ensures robust logic-level integrity across voltage domains
Max Data Rate	380 Mbps for 1.8V↔3.3V translation - meets DDR SDRAM and low-voltage parallel bus timing
Quiescent Current	ICCA = ICCB = 20µA max at TA=85°C - enables always-on interface buffering in battery-sensitive systems
ESD Protection	HBM > 2000V, MM > 200V - eliminates need for external ESD diodes in board-level I/O protection
Series Resistor	26Ω on all A-side outputs - provides source termination for impedance-matched routing without discrete components

Pinout & Package

74VCX1632245TBR is packaged in µTFBGA42 (4.0×4.0mm, 0.5mm pitch), with 42 terminals including 32 I/Os, 2 direction controls, 2 output enables, 2 supplies, and 4 ground pins.

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A8, 2A1–2A8	A-side data I/Os	Interface with higher-voltage bus (VCCA domain); include 26Ω series resistors
1B1–1B8, 2B1–2B8	B-side data I/Os	Interface with lower-voltage bus (VCCB domain); no internal series resistance
1DIR, 2DIR	Direction control inputs	Active-high logic determines data flow direction (A→B or B→A) per transceiver pair
nG1, nG2	Output enable inputs	Active-low; drives all associated I/Os into high-impedance state when high
VCCA	A-side supply	Power rail for A-port logic and output drivers (2.3–3.6V)
VCCB	B-side supply	Power rail for B-port logic and output drivers (1.65–2.7V)
GND	Ground reference	Common return for both supply domains; 4 dedicated pins ensure low-noise switching

Key Features

Feature	Design Value
Dual independent transceivers	Two 8-bit channels (1A/1B and 2A/2B) with separate DIR/G controls - enables concurrent heterogeneous bus interfacing
Asymmetric voltage support	VCCA up to 3.6V and VCCB as low as 1.65V - allows direct connection to 1.8V FPGAs and 3.3V ASICs without external regulators
Power-down I/O protection	All inputs and outputs remain high-Z and clamped during VCC loss - prevents back-driving of powered rails
Latch-up immunity	Exceeds 500mA per JESD17 - ensures robustness in noisy industrial environments with supply transients
Dynamic skew control	tOSLH/tOSHL ≤ 0.75ns max - guarantees simultaneous switching of all 8 bits within one channel for clean parallel bus timing

Applications

DDR SDRAM Interface

FPGA-to-ASIC Bridging

Use Scenario: Interfacing a 3.3V memory controller with 1.8V DDR SDRAM chips in embedded computing modules.

IC Role / Device Role / Timing Role: Bidirectional level translator and bus buffer managing address/data/control lines with matched tPLH/tPHL delays.

Use Value: Eliminates timing skew between DQ and DQS lines while supporting 380 Mbps DDR data rates without external termination.

Use Scenario: Connecting a 2.5V FPGA I/O bank to a 3.3V legacy ASIC in test equipment control logic.

IC Role / Device Role / Timing Role: Voltage-domain isolator with independent DIR/G per 8-bit lane enabling partial reconfiguration without system reset.

Use Value: Prevents cross-domain leakage during FPGA configuration cycles and maintains signal integrity at 260 Mbps.

Industrial PLC Backplane

Automotive Infotainment Gateway

Use Scenario: Level-shifting between 3.3V microcontroller peripherals and 2.5V sensor interface ICs on a modular I/O carrier board.

IC Role / Device Role / Timing Role: Isolated bus transceiver with power-down protection ensuring safe hot-swap of field modules.

Use Value: 20µA quiescent current extends runtime in battery-backed PLCs; 500mA latch-up rating withstands industrial EFT bursts.

Use Scenario: Translating signals between 1.8V SoC debug interfaces and 3.3V CAN/LIN transceiver modules in head-unit designs.

IC Role / Device Role / Timing Role: Low-capacitance (6pF CI/O) translator minimizing signal degradation on high-frequency SWD/JTAG traces.

Use Value: 26Ω A-side series resistors suppress ringing on 10cm debug traces without adding layout area or BOM cost.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVC16T245RJR	Single-supply (1.2–3.6V), no built-in series resistors, 3.5ns tPD (typ)	Requires external 26Ω resistors for A-side termination; better for ultra-low-delay single-rail systems	Select when VCCA and VCCB can be tied and board space allows discrete termination.
TXB0108PWR	Auto-direction sensing, 1.2–3.6V, 5.8ns tPD (max), no series resistors	Eliminates DIR/G control lines but adds direction-detection latency; unsuitable for synchronous bidirectional protocols	Select only for simple GPIO expansion where direction changes infrequently and timing margin >5ns exists.

Compared with SN74AVC16T245RJR and TXB0108PWR, the 74VCX1632245TBR uniquely combines dual-supply flexibility, integrated A-side termination, and guaranteed 4.4ns max delay-making it optimal for deterministic, high-speed, mixed-voltage parallel bus designs where layout simplicity and timing predictability are critical.

Availability

74VCX1632245TBR is available at Aetrix Electronics and suitable for DDR memory subsystems, FPGA-ASIC bridging, industrial PLC backplanes, and automotive infotainment gateways requiring stable component supply across extended temperature ranges.

Supply support for 74VCX1632245TBR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The VCX family targets low-voltage, high-speed logic interfaces with emphasis on mixed-supply translation, ESD robustness, and minimal power consumption in space-constrained applications.

FAQ

What is the minimum VCCB voltage required for reliable operation with VCCA = 3.3V?

The datasheet specifies VCCB(OPR) = 1.65V to 2.7V, and functional operation is guaranteed down to 1.65V when VCCA = 3.3V. At this minimum, DC parameters such as VOHB (1.25V min at IO = −6mA) and VOLB (0.30V max at IO = 6mA) remain within spec, supporting 1.8V logic compatibility. Operation below 1.65V is not characterized.

Can the 74VCX1632245TBR be used with VCCA = 2.5V and VCCB = 1.8V?

Yes. This combination falls within the specified operating ranges (VCCA = 2.3–3.6V, VCCB = 1.65–2.7V) and is explicitly validated in Tables 6 and 7. Propagation delay is 5.1ns max (B→A) and 5.5ns max (A→B) at these voltages, supporting up to 260 Mbps data rates per the "<1.8V to 3.3V translation" specification.

Are the 26Ω series resistors present on both A-side and B-side outputs?

No. The datasheet states "26Ω SERIES RESISTOR ON A SIDE OUTPUTS" and confirms this only for pins 1A1–1A8 and 2A1–2A8. B-side outputs (1B1–1B8, 2B1–2B8) have no internal series resistance - their output impedance is governed solely by driver strength (e.g., 18mA min at VCCA=2.3V/VCCB=1.65V).

Does the device support hot insertion when one supply is unpowered?

Yes. The "POWER DOWN PROTECTION ON INPUTS AND OUTPUTS" feature ensures all I/Os enter high-impedance and clamp to safe voltage levels when either VCCA or VCCB is at 0V. Input leakage remains ≤±10µA (IOZA/IOZB), and power-off leakage (IOFF) is ≤±10µA, preventing back-current flow into unpowered domains.

74VCX1632245TBR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74VCX

Package/Case:: 42-TFBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Translation Transceiver

Number of Elements:: 2

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 8mA, 8mA; 18mA, 18mA

Voltage - Supply:: 1.65V ~ 2.7V, 2.3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 42-TFBGA (4x3.5)

74VCX1632245TBR FAQ

1.How can I place an order for 74VCX1632245TBR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VCX1632245TBR 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 74VCX1632245TBR reliable?

The price and inventory of 74VCX1632245TBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX1632245TBR is usually 5 days.

3.What payment methods are accepted for 74VCX1632245TBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX1632245TBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VCX1632245TBR?

74VCX1632245TBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VCX1632245TBR 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 74VCX1632245TBR?

For technical support, including 74VCX1632245TBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX1632245TBR requirements.

6.How does Aetrix verify that 74VCX1632245TBR is sourced from the original manufacturer or authorized distributors?

All 74VCX1632245TBR 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 74VCX1632245TBR meets industry standards.

7.What is the process for return or replacement of 74VCX1632245TBR?

All 74VCX1632245TBR units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX1632245TBR, 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 74VCX1632245TBR part is unused and in its original packaging.

Return procedure for 74VCX1632245TBR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…