onsemi MC74VHC1G32DTT1G

Overview

MC74VHC1G32DTT1G from onsemi is a single 2-input OR gate in SC-70-5 package, operating from 2.0 V to 5.5 V supply, with propagation delay of 3.7 ns (at V_CC = 5 V, C_L = 50 pF), rail-to-rail output swing, and guaranteed latch-up immunity per JESD78 Class II (>500 mA). It serves as a logic-level combiner in low-power portable interface circuits.

For engineers reviewing the MC74VHC1G32DTT1G datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage range compatibility, propagation delay budget for timing-critical paths, input threshold stability across temperature, output drive strength for capacitive loads, and SC-70 footprint constraints in space-constrained PCB layouts.

Technical Context

This device belongs to the VHC (Very High Speed CMOS) family, fabricated using silicon-gate CMOS technology to achieve high speed comparable to bipolar logic while retaining CMOS advantages: low static power dissipation, high noise immunity, and wide supply voltage range. Its inputs are TTL-compatible down to 2.0 V, enabling direct interfacing with legacy 3.3 V and 5 V logic families without level shifters.

The output stage uses complementary MOS transistors configured for push-pull operation, delivering symmetrical rise/fall times (typ. 3.5 ns at V_CC = 5 V) and full rail-to-rail voltage swing (V_OH ≥ V_CC − 0.1 V, V_OL ≤ 0.1 V). Input hysteresis is not implemented - thresholds follow standard CMOS behavior (V_IH ≈ 0.7×V_CC, V_IL ≈ 0.3×V_CC).

Key Specifications

Pinout & Package

SC-70-5 (SOT-353) package: 1.25 mm × 2.1 mm footprint, 0.65 mm pitch, 0.9 mm max height - optimized for ultra-compact PCB real estate in wearables and medical patches.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR gate applications.

Compared with SN74LVC1G32DBVR and 74AUP1G32GW,125, the MC74VHC1G32DTT1G delivers the best balance of speed (3.7 ns), wide supply range (2.0–5.5 V), and industrial temperature support (−55 °C to +125 °C) in the SC-70-5 footprint - making it the preferred choice for mixed-voltage automotive and industrial control logic.

Availability

MC74VHC1G32DTT1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable device power sequencing, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC74VHC1G32DTT1G 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

onsemi is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications, with leadership in power management, analog, sensors, and connectivity solutions.

The MC74VHC1G32DTT1G belongs to the VHC logic family, designed specifically for high-speed, low-power digital signal routing in space- and power-constrained embedded systems where reliability across harsh environments is mandatory.

FAQ

What is the maximum operating frequency supported by the MC74VHC1G32DTT1G?

The MC74VHC1G32DTT1G is a combinational logic gate with no internal clock; its usable frequency depends on propagation delay and load capacitance. With t_PD = 3.7 ns (max) and C_L = 50 pF, it reliably supports signal transitions up to ~135 MHz (1/(2 × t_PD)). For clean edges in high-speed data paths, keep trace capacitance ≤15 pF to maintain timing margins. The MC74VHC1G32DTT1G does not specify a clock frequency rating because it operates asynchronously.

Can the MC74VHC1G32DTT1G be used with a 1.8 V supply?

No, the MC74VHC1G32DTT1G has a minimum supply voltage of 2.0 V per its datasheet absolute maximum ratings and AC specifications. At 1.8 V, input thresholds become undefined, propagation delay exceeds specification, and output drive falls outside guaranteed levels. For 1.8 V operation, consider the 74AUP1G32GW,125 (0.8–3.6 V range) instead. The MC74VHC1G32DTT1G must be operated between 2.0 V and 5.5 V to meet all published performance parameters.

Does the MC74VHC1G32DTT1G have built-in ESD protection?

Yes, the MC74VHC1G32DTT1G features on-chip ESD protection diodes rated to ±2 kV HBM (Human Body Model) per JESD22-A114. This provides baseline handling robustness during assembly but does not replace system-level TVS protection for I/O lines exposed to connectors or cables. The latch-up immunity (JESD78 Class II, >500 mA) further enhances ruggedness against transient overstress events. Always observe proper ESD handling procedures when soldering the MC74VHC1G32DTT1G.

Is the MC74VHC1G32DTT1G pin-compatible with other SC-70-5 OR gates?

Yes, the MC74VHC1G32DTT1G uses the industry-standard SC-70-5 (SOT-353) pinout: Pin 1 = A, Pin 2 = B, Pin 3 = GND, Pin 4 = Y, Pin 5 = V_CC. This matches SN74LVC1G32DBVR, 74AUP1G32GW,125, and NC7SZ32M5X - enabling direct PCB footprint reuse across these families when design changes require alternate speed/power trade-offs. The MC74VHC1G32DTT1G maintains consistent pin mapping across all VHC-series single-gate variants.

How does the MC74VHC1G32DTT1G handle floating inputs?

The MC74VHC1G32DTT1G has no internal input pull resistors; floating inputs cause undefined output states and increased ICC due to shoot-through current in the input stage. Always tie unused inputs to V_CC or GND via ≤10 kΩ resistors. For OR gate logic, connect unused inputs to GND to prevent false assertion. Leaving inputs unconnected violates the Absolute Maximum Ratings and may lead to erratic behavior or accelerated device wear. This requirement applies identically to all configurations of the MC74VHC1G32DTT1G.