Logic - Translators, Level Shifters

Part Number	Description / PDF	Quantity
74LVC4245AQG	OCTAL BUS TRANSCEIVER	0
74AUP1T34GS,132 Nexperia	IC TRNSLTR UNIDIRECTIONAL 6XSON	0
SN65ELT22D Texas Instruments	SN65ELT22 5V DUAL TTL TO DIFFERE	21900
NB4N11MDTR2G	PECL TO CML TRANSLATOR, COMPLEME	8039
MC100LVELT22D	TTL/CMOS TO PECL TRANSLATOR	10220
PCA9306DP1,125 NXP Semiconductors	IC TRNSLTR BIDIRECTIONAL 8TSSOP	2071
MC100EPT26DR2	PECL TO TTL TRANSLATOR	22175
TCA9803DGKR Texas Instruments	IC TRNSLTR BIDIRECTIONAL 8VSSOP	0
MC100LVEL91DWG Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR UNIDIRECTIONAL 20SOIC	11114
NLSX5014DR2G Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR BIDIRECTIONAL 14SOIC	25002500
PCA9306DCUTG4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 8VSSOP	2672
SY10ELT21ZC Roving Networks / Microchip Technology	PECL-TO-TTL TRANSLATOR	1439
GTL1655DGG,512 NXP Semiconductors	REGISTERED BUS TRANSCEIVER	92
74AVC20T245DGV,118 NXP Semiconductors	NOW NEXPERIA 74AVC20T245DGV - BU	35280
SY100ELT23LZG Roving Networks / Microchip Technology	IC TRNSLTR UNIDIRECTIONAL 8SOIC	466
74ALVC164245DLG4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 48SSOP	0
74AXP1T125GNH NXP Semiconductors	BUS DRIVER, AXP SERIES, 1-FUNC,	90000
SN74AVCH16T245VR Texas Instruments	IC TRNSLTR BIDIRECTIONAL 48TVSOP	1826
74AVCH2T45DCTTG4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL SM8	0
NLSV2T244MUTAG Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR UNIDIRECTIONAL 8UDFN	22794

Logic - Translators, Level Shifters

1. Overview

Logic translators and level shifters are semiconductor devices that enable signal compatibility between circuits operating at different voltage levels. These ICs ensure reliable data transmission by converting logic signals from one voltage domain to another, maintaining signal integrity in mixed-voltage systems. Their importance has grown with the proliferation of low-voltage CMOS technologies and multi-rail power architectures in modern electronics.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Single-direction translators	Unidirectional voltage conversion with isolation	SPI interface between 3.3V FPGA and 1.8V sensors
Bi-directional translators	Automatic direction detection, dual-voltage I/O	I2C bus bridging between 5V microcontroller and 2.5V EEPROM
Multi-channel level shifters	Parallel conversion of multiple signals (4-32 channels)	Memory interface between SoC and DDR4 SDRAM modules
Direction-controlled translators	External control pin for signal direction selection	UART level conversion in industrial communication modules

3. Structure and Composition

Typical devices feature a monolithic CMOS structure with dual power supply inputs (VCCA and VCCB). Physical components include:

Dual-supply MOSFET pairs for voltage translation
Integrated clamp circuits for ESD protection
Direction control logic (for bidirectional types)
Channel-specific enable/disable circuitry

Common package types: TSSOP (14-48 pins), QFN (20-64 pins), WLCSP (1.5 1.5mm ultra-compact).

4. Key Technical Specifications

Parameter	Significance
Voltage range (1.2V-5.5V)	Determines compatibility with different logic families
Conversion rate (100Mbps-1.2Gbps)	Limits maximum operating frequency
Channel count (1-32)	Impacts system integration density
Propagation delay (2-20ns)	Affects timing critical applications
Quiescent current (1-100 A)	Power efficiency in battery-powered systems

5. Application Areas

Key industries include:

Telecommunications: 5G baseband processors interfacing with RF front-ends
Industrial automation: PLC modules connecting 24V sensors to 3.3V MCUs
Consumer electronics: Smartphone PMIC to application processor communication
Automotive systems: CAN-FD transceiver voltage adaptation
IoT devices: Sensor hub interfacing between different voltage rail components

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	TXB0108	8-channel, 1.2-3.6V to 1.65-5.5V translation, auto-direction detection
NXP Semiconductors	LTC2850	3.3/5V dual supply, 15kV ESD protection, RS485/UART interface
ON Semiconductor	NXU408	4-channel, 0.9-5.5V range, sub-1ns propagation delay
STMicroelectronics	L6470	Stepper motor driver with integrated level shifting for industrial automation

7. Selection Guidelines

Key considerations:

Match supply voltage ranges with source/target systems
Ensure conversion rate meets timing requirements
Choose appropriate channel density to minimize PCB area
For bidirectional buses, select devices with automatic direction sensing
Consider thermal performance for high-current applications
Evaluate ESD protection levels for industrial environments

8. Industry Trends

Development directions include:

Voltage scaling down to 0.8V core operation
Integration with signal conditioning functions
Increased adoption of capacitive isolation technology
Advanced packaging (3D TSV, fan-out WLP)
Protocol-aware smart translation (I3C, PCIe 6.0)