Functional Description
74VHC9151FT: 9-BIT SCHMITT BUFFER
74VHC9152FT: 9-BIT SCHMITT INVERTER

General
The 74VHC9151FT/74VHC9152FT are an ultra-high-speed 9-bit Schmitt Buffer / Inverter fabricated using
silicon-gate CMOS technology. The 74VHC9151FT/74VHC9152FT combines low power consumption of CMOS
with Schottky TTL speeds.
74VHC9151FT output is a non-inverting type and the 74VHC9152FT output is an inverting type.
All the inputs have hysteresis between the positive-going and negative-going thresholds. Thus the
74VHC9151FT/74VHC9152FT are capable of squaring up transitions of slowly changing input signals and
provides an improved noise immunity.
Additionally, all the inputs have a newly developed protection circuit without a diode returned to VCC. This
enables the inputs to be tolerant of up to 5 volts even when power supply is down.
The input power-down protection capability makes the 74VHC9151FT/74VHC9152FT ideal for a wide range of
applications, such as interfacing between different voltages, voltage translation from 5 V to 3 V and battery backup
circuits.

Features
(1) AEC-Q100 (Rev. H) (Note 1)
(2) Wide operating temperature range: Topr = -40 to 125 
(3) High speed: tpd = 3.6 ns (typ.) at VCC = 5.0 V
(4) Low power dissipation: ICC = 4.0 μA (max) at Ta = 25 
(5) Power down protection is provided on all inputs.
(6) Balanced propagation delays: tPLH ≈ tPHL
(7) Wide operating voltage range: VCC(opr) = 2.0 V to 5.5 V