NXP Semiconductors 74ALVT16827DGGS

Overview

74ALVT16827DGGS from Nexperia is a 20-bit non-inverting 3-state buffer/line driver in TSSOP56 package, operating from 2.3 V to 3.6 V supply, featuring dual independent output-enable controls (nOE1/nOE2), bus-hold inputs eliminating external pull-ups, and overvoltage-tolerant inputs up to 5.5 V. It supports high-speed data routing in backplane and memory interface applications with propagation delays as low as 0.7 ns (VCC = 3.3 V).

For engineers reviewing the 74ALVT16827DGGS datasheet, 74ALVT16827DGGS pinout, 74ALVT16827DGGS application, or 74ALVT16827DGGS equivalent, key selection criteria include 3-state timing (tPZH ≤ 3.8 ns), bus-hold current (IBHL ≥ 75 μA at 3 V), IOFF power-down protection, ±100 μA power-off leakage, and compatibility with TTL-level signaling across industrial temperature range (–40 °C to +85 °C).

Technical Context

The device implements two independent 10-bit buffered paths, each controlled by dedicated active-low output enables (1OE0/1OE1 for Group 1; 2OE0/2OE1 for Group 2), enabling selective tri-state control without affecting the other group. Its BiCMOS architecture delivers TTL-compatible input thresholds (VIH = 2.0 V min at 3.3 V) and strong drive capability (IOL = 64 mA, IOH = –32 mA).

Bus-hold circuitry actively maintains logic state on unused inputs, reducing system-level noise susceptibility and eliminating discrete pull-up resistors. The IOFF feature ensures near-zero I/O leakage during power-down (≤ ±100 μA), supporting partial power-down operation while maintaining signal integrity on shared buses.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56-pin, 6.1 mm body width, 0.5 mm pitch, 1.2 mm max height - optimized for high-density PCB layouts with thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit non-inverting buffer applications.

Compared with SN74ALVC16827DGGR and 74LVT162244DGGR, the 74ALVT16827DGGS uniquely combines 5.5 V input tolerance, integrated bus-hold, and higher drive strength - making it the only option among the three qualified for unbuffered backplane stubs and mixed-voltage hot-swap interfaces without redesign.

Availability

74ALVT16827DGGS is available at Aetrix Electronics and suitable for industrial backplane routing, memory interface buffering, hot-swappable module interfaces, and industrial I/O expansion requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74ALVT16827DGGS 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 74ALVT series targets high-speed, low-voltage logic interfacing in demanding industrial systems - designed specifically for robust operation in mixed-supply environments with stringent ESD and latch-up requirements.

FAQ

What is the maximum clock frequency supported by the 74ALVT16827DGGS?

The device does not operate on a clock; it is an asynchronous buffer. Its usable data rate depends on propagation delay and system timing margins. With tPLH/tPHL ≤ 2.3 ns (max at 3.3 V), it reliably supports data valid windows down to ~400 ps, enabling stable operation in 200+ MHz parallel bus systems when combined with appropriate PCB layout and termination.

Can the 74ALVT16827DGGS be used with a 5 V microcontroller driving its inputs?

Yes - all inputs are overvoltage tolerant up to 5.5 V regardless of VCC (2.3–3.6 V). No level shifter or clamping diode is required. Input thresholds remain compatible with TTL logic (VIH ≥ 2.0 V at 3.3 V), ensuring reliable recognition of 5 V high signals while protecting internal circuitry.

How does the bus-hold function behave when VCC is 0 V?

Bus-hold remains active only when VCC is within specification (≥2.3 V). At VCC = 0 V, bus-hold is disabled and inputs float. However, the IOFF circuitry limits input leakage to ±100 μA, preventing disruptive current flow into unpowered sections - a critical feature for hot-swap and partial-power-down architectures.

Are the 1OE and 2OE pins internally OR'd or independent?

They are fully independent: 1OE0/1OE1 control only outputs 1Y0–1Y9, and 2OE0/2OE1 control only outputs 2Y0–2Y9. Asserting either 1OE pin places its 10-bit group in high-impedance; the other group remains unaffected. This enables granular bus partitioning - e.g., disabling address lines while keeping data lines active.