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74HC4050D

Hex non-inverting buffer with 15V over-voltage tolerant inputs for level shifting, 2-6V supply in SOIC-16

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Manufacturer Part：

74HC4050D

Package：

SOIC-16 (9.90 x 3.90 x 1.75 mm) SOT109-1

Description

Product Overview

The 74HC4050D from Nexperia is a hex non-inverting buffer with over-voltage tolerant inputs in an SOIC-16 (9.9×3.9mm) package. The inputs can tolerate voltages up to 15V regardless of the supply voltage, making it ideal for HIGH-to-LOW level shifting applications. The device operates from 2.0V to 6.0V with ±5.2mA output drive at 6V.

Key Specifications

Number of Buffers	6 (Non-inverting)
Supply Voltage Range	2.0V ~ 6.0V
Input Over-Voltage Tolerance	15V (independent of VCC)
Output Drive	±5.2mA @ VCC=6V
Propagation Delay	7ns (Typ) @ VCC=6V
Input Leakage	<1µA
Package	SOIC-16 (9.90 x 3.90mm)
Operating Temperature	-40°C ~ +125°C

Features

Input over-voltage tolerant to 15V for level shifting
Wide supply voltage range: 2.0V to 6.0V
CMOS low power dissipation
High noise immunity
ESD protection: HBM >2000V, CDM >1000V
Latch-up performance exceeds 100mA per JESD78
Complies with JEDEC standards JESD8C and JESD7A

Applications

HIGH-to-LOW voltage level shifting
Logic level conversion between 5V and 3.3V systems
CMOS to TTL level conversion
Interface buffering between voltage domains
Battery backup circuit isolation

Product Introduction:74HC4050D Product Introduction

The 74HC4050D is a hex buffer with over-voltage tolerant inputs that can accept voltages up to 15V independent of the supply voltage. This feature makes it particularly useful for converting high-voltage logic levels to lower-voltage levels, such as 5V CMOS to 3.3V CMOS, or 12V logic to 5V. Unlike standard CMOS inputs that have clamp diodes to VCC, the 74HC4050 inputs are designed without VCC-side clamp diodes, allowing input voltages to exceed VCC without damage or current injection into the supply rail.

Working Principle:74HC4050D Working Principle

Each of the six buffer channels consists of a two-stage inverter chain that provides non-inverting logic function. The input stage uses a modified protection structure that omits the VCC-side ESD clamp diode, allowing input voltages to rise above VCC without forward-biasing a diode into the supply rail. The input signal is sensed relative to GND only, and the output stage drives the output to VCC (logic high) or GND (logic low) based on the input threshold. The output voltage is always referenced to VCC and GND, effectively translating the high-voltage input down to the supply rail level.

Pin Description:74HC4050D Pin Definition and Functions

Pin	Name	Function
1	1A	Buffer 1 input (15V tolerant)
2	1Y	Buffer 1 output
3	2A	Buffer 2 input
4	2Y	Buffer 2 output
5	3A	Buffer 3 input
6	3Y	Buffer 3 output
7	GND	Ground
8	NC	No connect
9	4A	Buffer 4 input
10	4Y	Buffer 4 output
11	5A	Buffer 5 input
12	5Y	Buffer 5 output
13	6A	Buffer 6 input
14	6Y	Buffer 6 output
15	NC	No connect
16	VCC	Positive supply (2.0-6.0V)

Application Scenarios:In which products and applications is74HC4050D used

5V to 3.3V Level Shifting: Input accepts 5V logic while VCC=3.3V, output produces clean 3.3V levels for ARM MCU interfaces
12V Industrial to 5V Logic: 15V input tolerance converts 12V PLC logic signals to 5V CMOS levels
Battery Backup Interface: Input can monitor 9V battery voltage while VCC is absent or in power-down state
Multi-Voltage Bus Interface: Six channels provide independent level-shifted buffering for parallel data buses between voltage domains

Alternative Models:What chips are recommended as replacements for 74HC4050D

Model	Manufacturer	Key Difference
74HC4049D	Nexperia	Inverting version of the same device
74HC4050PW	Nexperia	Same function in TSSOP-16 package
CD4050BM	TI	Original 4000-series, 20V max, slower
SN74LVCC3245	TI	Octal bidirectional level shifter, direction control
TXB0108PWR	TI	8-bit auto-direction sensing level shifter