The SN74LVC1G08-EP is a single 2-input positive-AND gate - output high only when both inputs are high - and the "G4" suffix on this order code simply denotes the Pb-free, RoHS-compliant second-level-interconnect finish. It is the same silicon and the same data-sheet specification as the standard order option; the G4 designation is a packaging/lead-finish trait, chosen by buyers who standardise on green ordering codes.

Where this gate earns its place on modern boards is as a mixed-voltage interface. Its inputs accept up to 5.5 V regardless of V_CC, so a 1.8 V or 3.3 V-powered gate can read signals from a 5 V domain directly; and its I_off circuit disables the output when the device is unpowered, so it will not load or back-drive a bus that is still alive. Combined with the wide 1.65 V–5.5 V supply, that makes it a safe glue-logic element between blocks running on different rails.

It also drives hard for its size - ±24 mA at 3.3 V - switches with a 3.6 ns typical-max delay at 3.3 V, and idles at about 10 µA, so it fits power-sensitive portable and IoT designs as easily as line-powered ones.

Note: Values are from the Texas Instruments SN74LVC1G08-EP data sheet (SCES454C); the G4 code shares this specification and differs only in lead finish. Confirm parameters against the latest data sheet before committing a design.

This order option uses the DBV 5-pin SOT-23 (JEDEC MO-178, 1.45 mm max height) with a Pb-free, RoHS-compliant finish - the meaning of the "G4" suffix. Mechanically and electrically it is identical to the standard SN74LVC1G08MDBVREP; only the second-level-interconnect finish is specified as green. It is shipped tape-and-reel for automated assembly.

The dimensioned drawing below gives the SOT-23-5 body and lead geometry for the land pattern and reflow profile.

Five pins carry the two inputs, the output and the supply pair (top view):

• Pin 1 – A (Input): First AND input; tolerant to 5.5 V for mixed-voltage use.
• Pin 2 – B (Input): Second AND input; tolerant to 5.5 V.
• Pin 3 – GND: Ground (0 V) reference.
• Pin 4 – Y (Output): AND output; disabled by I_off when V_CC = 0; ±24 mA at 3.3 V.
• Pin 5 – V_CC: Supply, 1.65 V to 5.5 V; set this rail to the desired output logic level and decouple locally.

The first row is the same device under its base (non-G4) order code; the rest are single 2-input AND gates in other logic families. Match the supply range, input tolerance and speed to your interface - only LVC and similar 5 V-tolerant families suit direct mixed-voltage use.

Logic Family Comparison

Texas Instruments (TI, NASDAQ: TXN), of Dallas, Texas, is a leading logic maker; its LVC family is the workhorse choice for wide-supply, 5 V-tolerant, mixed-voltage interfacing, and the Enhanced-Product (EP) variant adds an extended-temperature, controlled-baseline pedigree. Order codes ending in "G4" denote the Pb-free / green finish of the same device.

The governing document is the SN74LVC1G08-EP data sheet (SCES454C), which defines the electrical limits, I_off behaviour and the DBV package; lead-finish details are in the package addendum. InFortune Electronics supplies the device under code 1P1G08MDBVREPG4 and provides sourcing and technical support.