NXP Semiconductors 74ALVCH16821DGG118

Overview

74ALVCH16821DGG118 from Nexperia is a 20-bit bus-interface D-type flip-flop with dual 10-bit registers, positive-edge clock triggering, and independent 3-state output control per section. It operates from 1.2 V to 3.6 V, delivers ±24 mA output drive at 3.0 V, and features active bus hold on all data inputs. It is used in high-density data buffering and bidirectional bus interfacing for industrial control backplanes.

For engineers reviewing the 74ALVCH16821DGG118 datasheet, 74ALVCH16821DGG118 pinout, 74ALVCH16821DGG118 application, or 74ALVCH16821DGG118 equivalent, this page provides verified functional architecture, TSSOP56 package mapping, JEDEC-compliant voltage/temperature operating ranges, propagation delay (4.5 ns max at 3.3 V), and validated alternative parts for bus-hold-enabled 20-bit edge-triggered register replacement.

Technical Context

The 74ALVCH16821DGG118 implements two independent 10-bit edge-triggered D-register sections, each with dedicated clock (1CP/2CP) and output enable (1OE/2OE) inputs. Each register captures data on the LOW-to-HIGH clock transition, with setup time as low as 0.2 ns and hold time up to 0.8 ns at 3.3 V.

Its MULTIBYTE™ flow-through pinout minimizes signal skew across the 20-bit bus, while eight ground and four VCC pins reduce noise and ground bounce. Bus hold circuitry maintains valid logic levels on unused inputs without external resistors, complying with JEDEC standards JESD8-5 and JESD8B/JESD36.

Key Specifications

Pinout & Package

TSSOP56 package (SOT364-1), plastic thin shrink small outline, 56 leads, body width 6.1 mm, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit bus-interface register applications.

Compared with SN74ALVCH16821DGGR, the 74ALVCH16821DGG118 offers identical functionality but different manufacturer qualification reporting; compared with 74LVC16374ADGG, it provides 4 extra bits, integrated bus hold, and guaranteed 2.5 V operation - critical for mixed-voltage industrial systems requiring zero external components on data lines.

Availability

74ALVCH16821DGG118 is available at Aetrix Electronics and suitable for industrial backplane buffering, FPGA I/O expansion, and legacy bus interfacing requiring stable component supply across extended temperature and mixed-voltage operation.

Supply support for 74ALVCH16821DGG118 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, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial and consumer applications.

The 74ALVCH16821DGG118 belongs to Nexperia's ALVCH advanced low-voltage CMOS logic family, designed specifically for high-speed, low-power, mixed-voltage bus interfacing in space-constrained industrial control and communications equipment.

FAQ

What is the maximum clock frequency supported by the 74ALVCH16821DGG118?

The 74ALVCH16821DGG118 supports a maximum clock frequency of 350 MHz when operated at VCC = 3.0 V to 3.6 V, as specified in Table 7 of the datasheet. This performance is achieved with a propagation delay of 4.5 ns (max) from clock input to output, making it suitable for high-speed synchronous data latching in industrial backplane and memory interface applications.

Does the 74ALVCH16821DGG118 require external pull-up or pull-down resistors on its data inputs?

No, the 74ALVCH16821DGG118 does not require external pull-up or pull-down resistors because it integrates active bus hold circuitry on all data inputs (1D0–1D9 and 2D0–2D9). This feature maintains unused or floating inputs at valid logic levels, eliminating external components while ensuring robust operation during hot-swap or idle conditions.

What package type is used for the 74ALVCH16821DGG118, and what are its key mechanical dimensions?

The 74ALVCH16821DGG118 uses the TSSOP56 package (SOT364-1): a plastic thin shrink small outline package with 56 leads, 0.5 mm lead pitch, and 6.1 mm body width. Its height is 1.2 mm max, and it features eight GND and four VCC pins to minimize noise and ground bounce in high-speed 20-bit applications.

How does the 3-state output control work on the 74ALVCH16821DGG118?

The 74ALVCH16821DGG118 provides independent 3-state control via two active-LOW output enable inputs: 1OE (pin 1) controls the first 10-bit output bank (1Q0–1Q9), and 2OE (pin 28) controls the second (2Q0–2Q9). When asserted LOW, outputs reflect registered data; when HIGH, outputs enter high-impedance OFF state without affecting internal flip-flop states.

Is the 74ALVCH16821DGG118 compliant with industry ESD standards?

Yes, the 74ALVCH16821DGG118 complies with JEDEC ESD standards: Human Body Model (HBM) >2000 V and Charged Device Model (CDM) >1000 V, as confirmed in Section 2 of the datasheet. These ratings ensure robust handling and board-level reliability in industrial manufacturing and field-deployed equipment.