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74LCX16374MTDX

16-bit D-type flip-flop, 3-state, 2.3-3.6V, 5V tolerant, 6.2ns, 170MHz, TSSOP-48

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Manufacturer Part：

74LCX16374MTDX

Package：

TSSOP-48 (12.5 x 6.1 x 1.1 mm)

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Description

Product Overview

The onsemi 74LCX16374MTDX is a 16-bit D-type flip-flop with 3-state non-inverting outputs, housed in a 48-pin TSSOP package. Organized as two 8-bit bytes with separate clock and output enable controls, it operates from 2.3V to 3.6V with 5V-tolerant inputs/outputs, 6.2 ns maximum propagation delay, and ±24 mA balanced output drive. The device supports live insertion and withdrawal with IOFF specification.

Key Specifications

Logic Type	16-Bit D-Type Flip-Flop
Output Type	3-State, Non-Inverting
Organization	2 x 8-bit (byte-controlled)
Supply Voltage (VCC)	2.3 V to 3.6 V
Input/Output Tolerance	5.5V (5V tolerant)
Propagation Delay (tpd)	6.2 ns (Max @ 3.3V)
Max Clock Frequency	170 MHz
Output Drive	±24 mA
Quiescent Current (ICC)	20 µA (Max)
Operating Temperature	-40°C to +85°C
Package	TSSOP-48 (6.1mm wide)

Features

16-bit D-type flip-flop organized as two independently controlled 8-bit bytes
5V tolerant inputs and outputs for mixed-voltage system interfacing
6.2 ns maximum propagation delay at VCC = 3.3V
IOFF specification guarantees high impedance when VCC = 0V (live insertion)
Near-zero static supply current of 20 µA in all three logic states
±24 mA balanced output sink and source capability
ESD protection: HBM >2000V, Machine Model >200V
Latch-up performance exceeds 500 mA
Pb-Free, Halogen Free, RoHS compliant

Applications

Bus-oriented data storage and buffering
Register file implementations in processor systems
Mixed-voltage system data path interfacing
Live insertion/extraction bus isolation
Pipeline stages in digital signal processing

Product Introduction:74LCX16374MTDX Product Introduction

The onsemi 74LCX16374MTDX is a high-performance 16-bit D-type flip-flop with 3-state non-inverting outputs, organized as two independently controlled 8-bit bytes. Fabricated with advanced CMOS technology, the device operates from 2.3V to 3.6V and achieves 6.2 ns maximum propagation delay at 3.3V. The 5V tolerant inputs and outputs allow safe interfacing with 5V TTL logic systems. The device features IOFF circuitry that guarantees high impedance on all I/O pins when VCC is at 0V, supporting live insertion and withdrawal in hot-swap applications. Each byte has separate Clock Pulse (CPn) and Output Enable (OEn) control inputs, which can be tied together for full 16-bit operation. The flip-flops store data on the LOW-to-HIGH clock transition, and the 3-state outputs can be placed in high-impedance mode via the OE control. The device is Pb-Free, Halogen Free, and RoHS compliant.

Working Principle:74LCX16374MTDX Working Principle

The 74LCX16374MTDX contains 16 edge-triggered D-type flip-flops organized as two 8-bit bytes. Each byte has its own Clock Pulse (CP) input and Output Enable (OE) input. On the LOW-to-HIGH transition of CPn, the data present at the D inputs (D0-D7 for byte 1, D8-D15 for byte 2) is latched into the flip-flops. The latched data appears at the outputs (O0-O15) when the corresponding OEn is LOW. When OEn is HIGH, the outputs go to the high-impedance (Z) state, but the internal flip-flop contents are unaffected — the OE input only controls the output buffer, not the storage element. The IOFF circuitry ensures that when VCC = 0V, all I/O pins are in high-impedance state, preventing back-driving of the bus during power-up/power-down sequences. The 5V tolerant I/O structure uses extended-voltage transistors, allowing 5V signals to be applied without damage. The CMOS output buffer provides ±24 mA balanced drive capability.

Pin Description:74LCX16374MTDX Pin Definition and Functions

Pin	Name	Type	Function
1	OE1	Input	Output enable for byte 1 (active low)
2	O0	Output	Output bit 0 (3-state)
3-6	O1-O4	Output	Output bits 1-4 (3-state)
6	VCC	Power	Supply voltage (2.3V to 3.6V)
8-12	O5-O8	Output	Output bits 5-8 (3-state)
13-17	O9-O12	Output	Output bits 9-12 (3-state)
18	VCC	Power	Supply voltage
19-23	O13-O15	Output	Output bits 13-15 (3-state)
24	OE2	Input	Output enable for byte 2 (active low)
25	CP2	Input	Clock pulse for byte 2 (rising edge)
26-36	D15-D8	Input	Data inputs bits 15-8 (byte 2)
36	CP1	Input	Clock pulse for byte 1 (rising edge)
37-47	D7-D0	Input	Data inputs bits 7-0 (byte 1)
48	CP1	Input	Clock pulse input for byte 1

Application Scenarios:In which products and applications is74LCX16374MTDX used

16-bit data bus buffering and storage in microprocessor systems
Register file implementation in DSP and FPGA interface circuits
Mixed 5V/3.3V system data path interfacing with live insertion support
Pipeline stage registers in high-speed digital signal processing
Bus isolation in backplane and hot-swap card applications

Alternative Models:What chips are recommended as replacements for 74LCX16374MTDX

Manufacturer	Part Number	Package	Notes
Texas Instruments	SN74LVC16374ADLR	TSSOP-48	Pin-to-pin compatible
Nexperia	74LVC16374ADGG	TSSOP-48	Equivalent function
onsemi	74LCX16374FCTDX	FBGA-48	Ball grid array alternative
STMicroelectronics	74LVC16374ADGG	TSSOP-48	Pin-compatible equivalent
onsemi	74LCX16374MTD	TSSOP-48	Tube packaging variant