Nexperia USA Inc. 74HC573D,652

Overview

74HC573D,652 from Nexperia is an octal D-type transparent latch with 3-state outputs, used for bus-oriented data latching and I/O port expansion in microprocessor systems. It features independent latch enable (LE) and output enable (OE) controls, operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers 30 ns typical propagation delay at 4.5 V. It is commonly deployed in industrial control backplanes and embedded system address/data bus isolation.

For engineers reviewing the 74HC573D,652 datasheet, 74HC573D,652 pinout, 74HC573D,652 application, or 74HC573D,652 equivalent, key selection criteria include 3-state bus drive capability, TTL-compatible input thresholds (via 74HCT573 variant), latch transparency timing, SO20 package thermal performance, and compatibility with 5 V logic families in mixed-voltage systems.

Technical Context

This device implements eight independent D-type latches with synchronous parallel loading via a common LE signal and collective 3-state output control via OE. Each latch captures data on the HIGH-to-LOW transition of LE, retaining state until next LE assertion - enabling precise data capture from asynchronous buses.

Its CMOS architecture ensures low static current (≤160 μA at 125 °C), high noise immunity (>40 % of VCC), and rail-to-rail output swing (VOH ≥ 4.32 V, VOL ≤ 0.26 V at 4.5 V/6 mA). Input clamp diodes allow safe interfacing with voltages exceeding VCC when current-limited.

Key Specifications

Pinout & Package

74HC573D,652 is supplied in SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, gull-wing leads, JEDEC MS-013 compliant. Thermal resistance θJA = 109 °C/W (typ), with linear derating above 109 °C (12.3 mW/K).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transparent latch applications.

Compared with 74HC573D,652, the 74HCT573D,653 offers superior input compatibility with older logic families but shares identical latching behavior and drive strength, while the SN74HC573PWR trades thermal performance and manufacturability for compactness - making each choice dependent on system-level voltage, density, and thermal constraints.

Availability

74HC573D,652 is available at Aetrix Electronics and suitable for industrial control backplanes, microcontroller I/O expansion, memory address latching, and legacy bus buffering requiring stable component supply across extended temperature ranges.

Supply support for 74HC573D,652 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and automotive applications.

The 74HC573 belongs to Nexperia's HC logic family - designed specifically for low-power, high-noise-immunity digital interfacing in extended-temperature industrial environments with strict supply voltage flexibility.

FAQ

What is the maximum clock frequency supported by the 74HC573D,652?

The 74HC573D,652 does not operate on a clock signal - it is a transparent latch controlled by level-sensitive LE and OE inputs. Its usable data rate is determined by propagation delay (30 ns typical at 4.5 V) and setup/hold times (13 ns su / 5 ns h at 4.5 V), supporting reliable operation in bus systems up to approximately 20 MHz with proper timing margins.

Can the 74HC573D,652 be used with 3.3 V microcontrollers?

Yes - the 74HC573D,652 operates down to 2.0 V and is fully compatible with 3.3 V logic. At VCC = 3.3 V, VIH is 2.31 V min and VOL is ≤0.26 V at 4 mA, ensuring solid noise margins. However, output VOH will be ~3.1 V, which may require level translation when driving 5 V TTL inputs.

Is there a pin-compatible automotive-grade version?

No - the 74HC573D,652 is rated for -40 °C to +125 °C but is not AEC-Q100 qualified. Nexperia offers the 74HC573-Q100 (e.g., 74HC573D-Q100) as the automotive-qualified variant, featuring identical pinout and electrical specs plus enhanced ESD (HBM > 4000 V) and extended reliability testing per AEC-Q100 Grade 2 requirements.

How does the latch enable (LE) signal interact with the output enable (OE) signal?

LE and OE are fully independent: LE controls data capture into internal latches (HIGH = transparent, LOW = hold), while OE controls output driver state (LOW = active, HIGH = high-impedance). OE assertion does not affect latch contents - stored data remains intact and ready for re-enablement, enabling true bus isolation without data loss.