Logic - Translators, Level Shifters

Part Number	Description / PDF	Quantity
74ALVC164245PAG Renesas Electronics America	74ALVC164245 - CMOS 16-BIT 3.3 T	320566
SN74LVC1T45DBVR Texas Instruments	IC TRNSLTR BIDIRECTIONAL SOT23-6	20351
100393QC	ECL TO TTL TRANSLATOR	22
74LVC16T245DGVRG4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 48TVSOP	0
MAX13043EEBC+T Analog Devices, Inc.	IMPROVED HIGH-SPEED LLT	12500
ISL3036EIRZ-TK Intersil (Renesas Electronics America)	INTERFACE CIRCUIT, PQCC14	39000
MC10ELT28DT	PECL-TTL/TTL-PECL TRANSLATOR	4682
TPS65196RHDR Texas Instruments	TPS65196 15-CHANNEL LEVEL SHIFTE	3000
LTC1555CGN#TRPBF Analog Devices, Inc.	IC TRNSLTR BIDIRECTIONAL 16SSOP	0
SN10KHT5574DW Texas Instruments	SN10KHT5574 OCTAL ECL-TO-TTL TRA	16273
NLSV2T244DMR2G Sanyo Semiconductor/ON Semiconductor	IC TRNSLTR UNIDIRECTIONAL MICRO8	0
TPS65680RSNR Texas Instruments	IC TRNSLTR BIDIRECTIONAL 32WQFN	0
MC100EPT622FAG	LVTTL/LVCMOS TO LVECL TRANSLATOR	7588
SN74GTLP1394PWR Texas Instruments	SN74GTLP1394 2-BIT LVTTL-TO-GTLP	3286
MC100EL91DW	PECL TO ECL TRANSLATOR	3528
TXS0104EDG4 Texas Instruments	IC TRNSLTR BIDIRECTIONAL 14SOIC	0
SY100EPT28LKG-TR Roving Networks / Microchip Technology	3V LVTTL-TO-DIFFERENTIAL LCPECL	470
TXB0102YZPR Texas Instruments	IC TRNSLTR BIDIRECTIONAL 8DSBGA	4080
MAX3379EEBC Analog Devices, Inc.	QUAD LOW-VOLT LEVEL TRANSLATOR	1615
MC100ELT22DTR2G	TTL/CMOS TO PECL TRANSLATOR, 2 F	2038

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)