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PDF M74HCT368 Data sheet ( Hoja de datos )
| Número de pieza | M74HCT368 | |
| Descripción | HEX BUS BUFFER 3-STATE HCT367 NONINVERTING / HCT368 INVERTING | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M54/M74HCT367
M54/M74HCT368
HEX BUS BUFFER (3-STATE)
HCT367 NON INVERTING, HCT368 INVERTING
. HIGH SPEED
tPD = 11 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C
. COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
. OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 6 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. PIN AND FUNCTION COMPATIBLE WITH
54/74LS367/368
B1R
(Plastic Package)
M 1R
(Micro Package)
F1R
(Ceramic Package)
C1R
(Chip Carrier)
DESCRIPTION
ORDER CODES :
M54HCTXXXF1R M74HCTXXXM1R
M74HCTXXXB1R M74HCTXXXC1R
The M54/74HCT367 and the M54/74HCT368 are
high speed CMOS HEX BUS BUFFER (3-STATE)
fabricated in silicon gate C2MOS technology. They
have the same high speed performance of LSTTL
combined with true CMOS low power consumption.
These devices contain six buffers, four buffers are
controlled by an enable input (G1) and the other two
buffers are controlled by the other enable input
(G2) ; the outputs of each buffer group are enabled
when G1 and/or G2 inputs are held low, and
when held high these outputs are disabled to be
high-impedance.
PIN CONNECTIONS (top view)
HCT368
These outputs are capable of driving up to 15 LSTTL
loads. The designer has a choice of non-inverting
outputs (HCT367) and inverting outputs (HCT368).
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
H CT 3 67
This integrated circuit has input and output charac-
teristics that are fully compatible with 54/74 LSTTL
logic families. M54/74HCT devices are designed to
directly interface HSC2MOS systems with TTL and
NMOS components. They are also plug in replace-
ments for LSTTL devices giving a reduction of
power consumption.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
February 1993
1/11
1 page  
M54/M74HCT367/368
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC CL
(V) (pF)
tTLH Output Transition 2.0 50
tTHL Time
tPLH Propagation
2.0 50
tPHL Delay Time
(for HCT367 only) 2.0 150
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
7 12
Value
-40 to 85 oC
74HC
Min. Max.
15
-55 to 125 oC
54HC
Min. Max.
18
Unit
ns
14 22 28 33
ns
18 28 35 42
tPLH Propagation
2.0 50
tPHL Delay Time
(for HCT368 only) 2.0 150
15 24 30 36
ns
19 30 38 45
tPZL Output Enable
tPZH Time
2.0 50
2.0 150
16 25 31 38 ns
20 31 39 47
tPLZ Output Disable
tPHZ Time
2.0 50
18 25 31 38 ns
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
fot HCT367
for HCT368
47
55
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC/6 (per Channel)
TEST CIRCUIT ICC (Opr.)
CPD CALCULATION
CPD is to be calculated with the following
formula by using the measured value of
ICC (opr.) in the test circuit opposite.
CPD
=
ICC (opr)
fIN × VCC
In determining the typical value of CPD, a
relatively high frequency of 1 MHz was ap-
plied to fIN, in order to eliminate any error
caused by the quiescent supply current.
* INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
5/11
5 Page 
M54/M74HCT367/368
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet M74HCT368.PDF ] | |
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