Datasheet
1. General description
The 74HC7540; 74HCT7540 is a high-speed Si-gate CMOS device and is pin compatible
with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7A.
The 74HC7540; 74HCT7540 provides eight inverting buffer/line drivers with 3-state
outputs and Schmitt-trigger action. The 3-state outputs are controlled by the output enable
inputs OE
1 and OE2. A HIGH on OEn causes the outputs to assume a high-impedance
OFF-state. Schmitt trigger action on the data inputs transforms slowly changing input
signals into sharply defined, jitter-free output signals.
The 74HC7540; 74HCT7540 is identical to the 74HC540; 74HCT540 but has hysteresis
on the data inputs.
2. Features and benefits
Inverting outputs
Low-power dissipation
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 C to +85 C and from 40 C to +125 C
3. Ordering information
74HC7540; 74HCT7540
Octal Schmitt trigger buffer/line driver; 3-state; inverting
Rev. 4 — 31 December 2012 Product data sheet
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC7540N 40 Cto+125C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HCT7540N
74HC7540D 40 C to +125 C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HCT7540D
74HC7540DB 40 C to +125 C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1