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PDF MM74HCT540 Data sheet ( Hoja de datos )
| Número de pieza | MM74HCT540 | |
| Descripción | Inverting Octal 3-STATE Buffer | |
| Fabricantes | Fairchild | |
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MM74HCT540, Inverting Octal 3-STATE Buffer
MM74HCT541, Octal 3-STATE Buffer
June 2007
tm
Features
■ TTL input compatible
■ Typical propagation delay: 12ns
■ 3-STATE outputs for connection to system buses
■ Low quiescent current: 80µA
■ Output current: 6mA (Min.)
General Description
The MM74HCT540 and MM74HCT541 3-STATE buffers
utilize advanced silicon-gate CMOS technology and are
general purpose high speed inverting and non-inverting
buffers. They possess high drive current outputs which
enable high speed operation even when driving large
bus capacitances. These circuits achieve speeds com-
parable to low power Schottky devices, while retaining
the low power consumption of CMOS. Both devices are
TTL input compatible and have a fanout of 15 LS-TTL
equivalent inputs.
MM74HCT devices are intended to interface between
TTL and NMOS components and standard CMOS
devices. These parts are also plug-in replacements for
LS-TTL devices and can be used to reduce power con-
sumption in existing designs.
The MM74HCT540 is an inverting buffer and the
MM74HCT541 is a non-inverting buffer. The 3-STATE
control gate operates as a two-input NOR such that if
either G1 or G2 are HIGH, all eight outputs are in the
high-impedance state.
In order to enhance PC board layout, the MM74HCT540
and MM74HCT541 offers a pinout having inputs and
outputs on opposite sides of the package. All inputs are
protected from damage due to static discharge by diodes
to VCC and ground.
Ordering Information
Order Number
MM74HCT540WM
MM74HCT540SJ
MM74HCT540MTC
MM74HCT541WM
MM74HCT541SJ
MM74HCT541MTC
MM74HCT541N
Package
Number
M20B
M20D
MTC20
M20B
M20D
MTC20
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering number.
©1984 Fairchild Semiconductor Corporation
MM74HCT540, MM74HCT541 Rev. 1.3
www.fairchildsemi.com
1 page  
AC Electrical Characteristics
MM74HCT540: VCC = 5.0V, tr = tf = 6ns, TA = 25°C, (unless otherwise specified).
Symbol
tPHL, tPLH
tPZL, tPZH
tPLZ, tPHZ
Parameter
Maximum Output Propagation Delay
Maximum Output Enable Time
Maximum Output Disable Time
Conditions
CL = 45pF
CL = 45pF, RL = 1kΩ
CL = 5pF, RL = 1kΩ
Typ.
12
14
13
Guaranteed
Limits
18
28
25
Units
ns
ns
ns
AC Electrical Characteristics
MM74HCT540: VCC = 5.0V ±10%, tr = tf = 6ns (unless otherwise specified).
Symbol
Parameter
Conditions
TA = –40 TA = –55
TA = 25°C to 85°C to 125°C
Typ. Guaranteed Limits
tPHL, tPLH Maximum Output
Propagation Delay
tPZH, tPZL Maximum Output Enable
Time
tPHZ, tPLZ Maximum Output Disable
Time
CL = 50pF
CL = 150pF
RL = 1kΩ CL = 50pF
CL = 150pF
RL = 1kΩ, CL = 50pF
12
22
15
20
15
20
30
30
40
30
25
38
38
50
38
30
45
45
60
45
tTHL, tTLH Maximum Output Rise
and Fall Time
CL = 50pF
6 12
15
18
CIN Maximum Input
Capacitance
5 10
10
10
COUT
Maximum Output
Capacitance
15 20
20
20
CPD Power Dissipation
Capacitance(4)
(per output) G = VCC
G = GND
12
50
Units
ns
ns
ns
ns
pF
pF
pF
Note:
4. CPD determines the no load dynamic power consumption, PD = CPD VCC2 f + ICC VCC, and the no load dynamic
current consumption, IS = CPD VCC f + ICC.
©1984 Fairchild Semiconductor Corporation
Rev. 1.3
5
www.fairchildsemi.com
5 Page 
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DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF
THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE
UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF
FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE
PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to result
in significant injury to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Advance Information
Formative or In Design
Preliminary
First Production
No Identification Needed Full Production
Obsolete
Not In Production
Definition
This datasheet contains the design specifications for product development.
Specifications may change in any manner without notice.
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to make
changes at any time without notice to improve design.
This datasheet contains final specifications. Fairchild Semiconductor reserves
the right to make changes at any time without notice to improve design.
This datasheet contains specifications on a product that has been
discontinued by Fairchild semiconductor. The datasheet is printed for
reference information only.
Rev. I28
©1984 Fairchild Semiconductor Corporation
Rev. 1.3
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MM74HCT540.PDF ] | |
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