NXP Semiconductors 74ABT823D,602

Overview

74ABT823D,602 from NXP Semiconductors is a 9-bit positive-edge-triggered D-type flip-flop register with master reset (MR), clock enable (CE), and 3-state outputs, designed for high-speed parity bus interfacing in multi-microprocessor systems. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, and achieves up to 200 MHz maximum clock frequency across −40 °C to +85 °C.

For engineers reviewing the 74ABT823D,602 datasheet, 74ABT823D,602 pinout, 74ABT823D,602 application, or 74ABT823D,602 equivalent, this device serves as a buffered 9-bit data latch for wide-data-path buffering, parity generation/verification, and bus isolation-requiring precise setup/hold timing, 3-state control coordination, and robust ESD immunity per JESD22-A114F (2000 V HBM).

Technical Context

The 74ABT823D,602 implements nine independent edge-triggered D flip-flops sharing a common rising-edge clock (CP), active-low master reset (MR), and active-low clock enable (CE). Its BiCMOS architecture enables low static current (≤250 µA) alongside fast propagation delays (tPLH/tPHL ≤ 6.8 ns at 5.0 V).

All outputs are 3-state controlled by OE (pin 1), supporting bus-sharing applications. Power-on reset and power-on 3-state behavior ensure deterministic initialization without external circuitry, while latch-up protection exceeds 500 mA per JESD78B Class II Level A.

Key Specifications

Pinout & Package

74ABT823D,602 is housed in a plastic small outline package (SO24) with 24 leads and 7.5 mm body width (SOT137-1), optimized for surface-mount assembly and thermal reliability in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 9-bit registered buffer applications.

Compared with SN74ABT823N and 74LVCH162374ADGG, the 74ABT823D,602 uniquely combines 5 V operation, asynchronous MR, SO24 packaging, and proven industrial temperature range-making it optimal for retrofitting legacy 5 V parity buses without layout or voltage rail changes.

Availability

74ABT823D,602 is available at Aetrix Electronics and suitable for parity bus interfacing, wide-data-path buffering, system-level reset coordination, and hot-swappable module isolation requiring stable component supply across industrial temperature ranges and long-lifecycle programs.

Supply support for 74ABT823D,602 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in high-performance logic and interface ICs.

The 74ABT823D,602 belongs to NXP's ABT (Advanced BiCMOS Technology) logic family, engineered for high-speed, low-power 5 V digital systems requiring robust noise immunity, strong drive strength, and industrial-grade reliability.

FAQ

What is the function of the MR pin on the 74ABT823D,602?

The MR (Master Reset) pin on the 74ABT823D,602 is an asynchronous active-low input that forces all nine Q outputs to LOW immediately, regardless of clock state or CE status. This function is critical for system-level fault recovery and ensures deterministic bus release within 7.1 ns (max) at −40 °C to +85 °C. The 74ABT823D,602 guarantees this behavior without requiring clock edges or setup time, making it essential for safety-critical reset coordination.

Does the 74ABT823D,602 support 3.3 V operation?

No, the 74ABT823D,602 is specified only for 4.5 V to 5.5 V supply operation per Table 5 of its NXP datasheet. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive characteristics are optimized for 5 V TTL compatibility. Applying 3.3 V to VCC may result in undefined logic states, reduced noise margin, or failure to meet timing specifications. For 3.3 V systems, consider NXP's 74LVC or 74LVCH families instead of the 74ABT823D,602.

How does the CE input affect clocking behavior in the 74ABT823D,602?

The CE (Clock Enable) input on the 74ABT823D,602 is an active-low control that gates the clock path: when CE = LOW, the rising edge of CP transfers Dn to Qn; when CE = HIGH, the register holds its current state (HOLD mode) regardless of CP transitions. This allows selective updating of latched data without stopping the main clock, enabling efficient pipeline control in multi-stage bus architectures using the 74ABT823D,602.

What is the significance of power-on 3-state in the 74ABT823D,602?

Power-on 3-state ensures that all Q outputs of the 74ABT823D,602 enter a high-impedance (OFF) state at power-up, preventing bus contention during system initialization. This behavior is intrinsic to the device's internal power-on reset circuitry and requires no external components. It directly supports safe integration into shared data buses where multiple devices power up asynchronously, a key reliability feature of the 74ABT823D,602 in industrial control systems.

Can the 74ABT823D,602 drive standard TTL loads directly?

Yes, the 74ABT823D,602 can drive standard TTL loads directly: its output sink current (IOL = 64 mA) exceeds the 16 mA required to pull down a single 74LS TTL input, and its source current (IOH = −32 mA) comfortably meets the 400 µA HIGH-level input requirement. With typical VOL ≤ 0.55 V at 64 mA and VOH ≥ 2.5 V at −3 mA, the 74ABT823D,602 maintains valid TTL logic levels even under full fan-out conditions.