NXP Semiconductors 74ABT823DB,118

Overview

74ABT823DB,118 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 delivers 125 MHz maximum clock frequency, ±32 mA/64 mA output drive, and operates across −40 °C to +85 °C in SSOP24 package.

For engineers reviewing the 74ABT823DB,118 datasheet, 74ABT823DB,118 pinout, 74ABT823DB,118 application, or 74ABT823DB,118 equivalent, key selection criteria include its 9-bit buffered register architecture, active-Low MR/CE/OE control logic, guaranteed setup/hold timing at 5 V, and compatibility with BiCMOS-based high-fan-in data path buffering.

Technical Context

The 74ABT823DB,118 implements nine independent edge-triggered D flip-flops sharing a common clock (CP), with synchronous load enabled by CE and asynchronous clear via MR. Its 3-state outputs are controlled by OE, supporting bus-sharing in wide-data-path systems.

It features BiCMOS process technology enabling low static current (≤250 µA) alongside high-speed switching (tPLH/tPHL ≤ 6.8 ns), robust ESD protection (HBM > 2000 V), and latch-up immunity exceeding 500 mA per JESD78B Class II Level A.

Key Specifications

Pinout & Package

74ABT823DB,118 is housed in a plastic shrink small outline package (SSOP24) with 24 leads and 5.3 mm body width (SOT340-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74ABT823DB,118, the SO24 variant offers improved thermal performance in space-tolerant designs, while SN74ABT823N provides second-source availability with minor timing trade-offs acceptable in non-critical paths.

Availability

74ABT823DB,118 is available at Aetrix Electronics and suitable for industrial control I/O expansion, multi-microprocessor parity bus buffering, and legacy system bus interface applications requiring stable component supply across extended temperature ranges.

Supply support for 74ABT823DB,118 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 company specializing in high-performance logic, automotive, and secure connectivity solutions, with headquarters in Eindhoven, Netherlands.

The 74ABT823DB,118 belongs to NXP's ABT-series advanced BiCMOS logic family, engineered for high-speed, low-power 5 V bus interface applications in industrial and computing infrastructure.

FAQ

What is the operating voltage range for the 74ABT823DB,118?

The 74ABT823DB,118 operates over a supply voltage range of 4.5 V to 5.5 V. This range ensures reliable interoperability with standard 5 V TTL and CMOS logic families while maintaining specified timing and drive performance across the full industrial temperature range (−40 °C to +85 °C). Operation outside this range may violate limiting values and compromise functionality.

Does the 74ABT823DB,118 support hot insertion or live bus swapping?

The 74ABT823DB,118 incorporates power-on 3-state and power-on reset features, which place outputs in high-impedance and Q outputs in LOW state during power ramp-up. While this mitigates bus contention at startup, the device does not include dedicated hot-swap circuitry such as slew-rate-controlled I/O or undervoltage lockout. Safe live insertion requires external current-limiting and sequencing design.

How does the master reset (MR) interact with clock enable (CE) in the 74ABT823DB,118?

In the 74ABT823DB,118, MR is asynchronous and overrides CE: when MR is asserted LOW, all Q outputs force to LOW immediately, irrespective of CE state or CP activity. CE only gates CP propagation when MR is deasserted HIGH. This priority ensures fail-safe initialization independent of clock or enable conditions.

What is the maximum capacitive load the 74ABT823DB,118 can drive while maintaining timing specs?

The 74ABT823DB,118 is characterized with a 50 pF load (CL) and 500 Ω termination (RL) per switching time test condition. Driving loads significantly above 50 pF will increase propagation delays and reduce maximum operating frequency. For loads >75 pF, derating of fmax and verification of tPLH/tPHL under actual board conditions is required.

Is the 74ABT823DB,118 pin-compatible with older 74 series devices like the 74LS823?

No, the 74ABT823DB,118 is not pin-compatible with 74LS823. Although both are 9-bit registers, the 74ABT823DB,118 uses a 24-pin SSOP package with dedicated OE (pin 1), MR (pin 11), and CE (pin 14), whereas 74LS823 uses different pin assignments and lacks OE/CE. Direct replacement requires PCB redesign and logic-level validation.