Functional Description

• Octal Bus Buffer

74VHCT540AFT: INVERTED, 3-STATE OUTPUTS

74VHCT541AFT: NON-INVERTED, 3-STATE OUTPUTS

General

The 74VHCT540AFT and 74VHCT541AFT are advanced high speed CMOS OCTAL BUS BUFFERs fabricated

with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky

TTL while maintaining the CMOS low power dissipation.

The 74VHCT540AFT is an inverting type and, the 74VHCT541AFT is a non-inverting type.

When either G1 or G2 are high, the terminal outputs are in the high-impedance state.

The input voltage are compatible with TTL output voltage.

These devices may be used as a level converter for interfacing 3.3 V to 5 V system.

Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (Note) pins

without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and

input/output voltages such as battery back up, hot board insertion, etc.

Note: Output in off-state

Features

(1) AEC-Q100 (Rev. H) (Note 1)

(2) Wide operating temperature range: Topr = -40 to 125 

(3) High speed: Propagation delay time = 5.4 ns (typ.) at VCC = 5.0 V

(4) Quiescent supply current: ICC = 4.0 μA (max) at Ta = 25 

(5) Compatible with TTL input: VIL = 0.8 V (max)

VIH = 2.0 V (min)

(6) Power down protection is provided on all inputs and outputs.

(7) Balanced propagation delays: tPLH ≈ tPHL

(8) Low noise: VOLP = 1.5 V (max)

(9) Pin and function compatible with the 74 series

(ACT/HCT/AHCT etc.) 540/541 type.