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SN74LVC16T245DGGR

16-bit dual-supply bus transceiver, 1.65V-5.5V level shifting, bidirectional, tri-state, 200Mbps, 48-TSSOP

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Manufacturer Part：

SN74LVC16T245DGGR

Package：

48-TSSOP (DGG), 6.10mm width

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Description

Product Overview

The SN74LVC16T245DGGR is a 16-bit dual-supply bus transceiver with configurable level-shifting and voltage translation from Texas Instruments. It features two independent 8-bit channels with separate direction and output-enable controls, supporting bidirectional translation between any combination of 1.65V to 5.5V voltage nodes. The device provides tri-state outputs, overvoltage-tolerant I/O, and partial-power-down protection (Ioff), making it ideal for mixed-voltage system interfacing.

Key Specifications

Manufacturer Texas Instruments
Logic Type Translation Transceiver
Number of Bits 16 (2 x 8-bit)
Voltage – VCCA 1.65V to 5.5V
Voltage – VCCB 1.65V to 5.5V
Data Rate Up to 200Mbps
Output Type Tri-State, Non-Inverted
Output Drive Current ±32mA
Propagation Delay 4.3ns typical
Channel Type Bidirectional
Control Inputs 1DIR, 2DIR, 1OE, 2OE (referenced to VCCA)
Operating Temperature -40°C to +85°C
Package 48-TSSOP (DGG), 6.1mm width
Budgetary Price $1.18 @ 1ku

Features

  • Fully configurable dual-rail design: each port operates 1.65V to 5.5V
  • Universal low-voltage bidirectional translation between 1.8V, 2.5V, 3.3V, and 5V nodes
  • Overvoltage-tolerant inputs and outputs for mixed-voltage communication
  • VCC isolation: both ports enter high-impedance if either VCC is at GND
  • Ioff support for partial-power-down mode operation
  • Control inputs referenced to VCCA for simplified system design
  • Tri-state outputs for bus-oriented applications
  • ±32mA output drive capability
  • Latch-up performance exceeds 100mA per JESD 78, Class II

Applications

  • Mixed-voltage microcontroller and processor interfacing
  • Communication bus level translation (SPI, UART, GPIO)
  • Backplane and system bus buffering
  • Industrial automation and PLC I/O modules
  • Embedded systems with multiple voltage domains

The SN74LVC16T245DGGR is Texas Instruments’ 16-bit dual-supply bus transceiver from the 74LVC family, designed for asynchronous communication between data buses operating at different voltage levels. The device features two independent 8-bit transceivers, each with separate direction (DIR) and output-enable (OE) control inputs referenced to VCCA. The A port tracks VCCA (1.65V to 5.5V) and the B port tracks VCCB (1.65V to 5.5V), enabling universal bidirectional translation between any combination of 1.8V, 2.5V, 3.3V, and 5V logic levels. The device supports data rates up to 200Mbps with typical propagation delay of 4.3ns. Overvoltage-tolerant I/O allows safe connection to higher-voltage buses, while the Ioff feature and VCC isolation ensure safe operation during partial power-down conditions.

Dual-Supply Level Translation

The SN74LVC16T245DGGR uses two independent power supply rails (VCCA and VCCB) to enable voltage-level translation between two different voltage domains. The A-port I/O levels are referenced to VCCA and the B-port I/O levels are referenced to VCCB. Each 8-bit transceiver can independently translate signals between the two voltage domains, controlled by DIR and OE pins supplied by VCCA.

Direction and Enable Control

Each 8-bit section has separate DIR and OE controls. When OE is low and DIR is high, data flows from A to B. When OE is low and DIR is low, data flows from B to A. When OE is high, both A and B outputs enter the high-impedance state, isolating the device from the bus. This tri-state capability enables multiple devices to share a common bus.

Overvoltage Tolerance

Both A and B port I/O pins are overvoltage-tolerant, allowing them to be connected to voltage rails higher than their respective VCC supplies without causing latch-up or damage. This is essential in mixed-voltage systems where signal lines may originate from a different voltage domain.

Power-Down Protection

The Ioff circuitry ensures that when either VCC rail is at GND, all I/O pins enter a high-impedance state, preventing damaging backflow current. The VCC isolation feature further ensures that if either supply is absent, both ports remain in high-impedance, protecting upstream and downstream circuitry.

Pin Name Type Function
1 1DIR Input Direction control for section 1 (referenced to VCCA)
2 1OE Input Output enable for section 1 (active low, referenced to VCCA)
3-10 1A1-1A8 I/O Section 1 A-port data lines
11 GND Ground Ground
12 VCCA Power A-port supply (1.65V to 5.5V)
13-20 1B1-1B8 I/O Section 1 B-port data lines
21-28 2B1-2B8 I/O Section 2 B-port data lines
29 VCCB Power B-port supply (1.65V to 5.5V)
30 GND Ground Ground
31-38 2A1-2A8 I/O Section 2 A-port data lines
39 2DIR Input Direction control for section 2 (referenced to VCCA)
40 2OE Input Output enable for section 2 (active low, referenced to VCCA)
  • Mixed-voltage microcontroller and FPGA systems requiring bidirectional translation between 1.8V, 2.5V, 3.3V, and 5V domains
  • SPI and UART communication interfaces between processors operating at different logic levels
  • Industrial PLC and automation I/O modules needing 16-bit bus buffering with tri-state control
  • Backplane and system bus transceivers where multiple voltage domains must communicate reliably
  • Portable electronics with dynamic voltage scaling requiring fast 200Mbps level translation
Manufacturer Part Number Package Notes
TI SN74LVC8T245DGVR 48-TVSOP 8-bit version, same family, lower pin count alternative
TI SN74LVC4245ADWR SOIC-24 8-bit 3.3V to 5V translator, fixed voltage
TI SN74AXCH4T245PWR TSSOP-16 4-bit, 0.65V to 3.6V, auto-direction sensing
NXP 74LVC16T245DGG TSSOP-48 Pin-compatible alternative
TI TXB0108PWR TSSOP-20 8-bit auto-direction translator, no DIR/OE needed
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We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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