74HC540; 74HCT540
Octal buffer/line driver; 3-state; inverting
Rev. 4 — 1 March 2016
Product data sheet
1. General description
The 74HC540; 74HCT540 is an 8-bit inverting buffer/line driver with 3-state outputs. The
device features two output enables (OE1 and OE2). A HIGH on OEn causes the outputs
to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables the
use of current limiting resistors to interface inputs to voltages in excess of VCC.
2. Features and benefits
Inverting outputs
Complies with JEDEC standard no. 7A
Input levels:
For 74HC540: CMOS level
For 74HCT540: TTL level
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
Table 1.
Ordering information
Type number
74HC540D
Package
Temperature range
Name
Description
Version
40 C to +125 C
SO20
plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
40 C to +125 C
SSOP20
plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HCT540D
74HC540DB
74HCT540DB
74HC540; 74HCT540
Nexperia
Octal buffer/line driver; 3-state; inverting
4. Functional diagram
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