Logic - Translators, Level Shifters

Part Number	Description / PDF	Quantity
SN74AVCH20T245GR Texas Instruments	SN74AVCH20T245 20-BIT DUAL-SUPPL	1899
74AVCB164245VRE4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 48TVSOP	0
SY100EPT21LZG Roving Networks / Microchip Technology	IC TRNSLTR UNIDIRECTIONAL 8SOIC	64
SN74GTL2003RKSR Texas Instruments	IC TRNSLTR BIDIRECTIONAL 20VQFN	15
74LVXC3245MTCX Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR BIDIRECTIONAL 24TSSOP	106
MC100EPT21DTG Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR UNIDIRECTIONAL 8TSSOP	7743100
ADG3231BRJZ-REEL Analog Devices, Inc.	SINGLE-CHANNEL LEVEL TRANSLATOR	47297
74AVCH2T45GN,115 NXP Semiconductors	74AVCH2T45 - DUAL-BIT, DUAL-SUPP	75521
74AUP1T57GN,132 Nexperia	IC LP CONFIG GATE V-XLATR 6XSON	0
GTL2005PW/DG,118 NXP Semiconductors	IC XLATR QUAD BI-DIREC 14-TSSOP	5370
MAX13014EBL-T Analog Devices, Inc.	DUAL-LEVEL TRANSLATOR	4888
TXS4558RUKR Texas Instruments	DUAL-SIM CARD POWER SUPPLY WITH	117065
TCA9517DGKRQ1 Texas Instruments	LEVEL-TRANSLATING I2C BUS REPEAT	0
MC100EPT20MNR4G	TTL/CMOS TO PECL TRANSLATOR, COM	19845
NLSX4302EBMUTCG Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR BIDIRECTIONAL 8UQFN	475857000
TXB0104QPWRQ1 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 14TSSOP	0
74FCT164245TPAG8 Renesas Electronics America	IC TRNSLTR BIDIRECTIONAL 48TSSOP	1617
SN74AUP1T58DCKT Texas Instruments	IC TRNSLTR UNIDIRECTIONAL SC70-6	1462
CLVCC3245AIDBREP Texas Instruments	SN74LVCC3245A-EP ENHANCED PRODUC	2000
SN74LVC4245APWG4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 24TSSOP	1384

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)