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PDF M54HC245 Data sheet ( Hoja de datos )

Número de pieza M54HC245
Descripción OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING/ HC643 INVERTING/NON INVERTING
Fabricantes ST Microelectronics 
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M54/74HC245/640/643
M54/74HC245/640/643
OCTAL BUS TRANSCEIVER (3-STATE): HC245 NON INVERTING
HC640 INVERTING, HC643 INVERTING/NON INVERTING
. HIGH SPEED
tPD = 10 ns (TYP.) at VCC = 5V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 oC
. HIGH NOISE IMMUNITY
VNIH = VINL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 6 mA (MIN)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS245/640/643
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R M74HCXXXM1R
M74HCXXXB1R M74HCXXXC1R
DESCRIPTION
The M54/74HC245, HC640 and HC643 utilise
silicon gate C2MOS technology to achive operating
speeds equivalent to LSTTL devices.
All input are equipped with protection circuits
against static discharge and transient discharge and
transient excess voltage.
Along with the low power dissipation and high noise
immunity of standards C2MOS integrated circuit, it
possesses the capability to drive 15 LSTTL loads.
These IC’s are intended for two-way asynchronous
communication between data buses, and the
direction of data trasmission is determined by DIR
input. The enable input (G) can be used to disable
the device so that the buses are effectively isolated.
IT IS PROHIBITED TO APPLY A SIGNAL TO A
BUS TERMINAL WHEN IT IS IN OUTPUT MODE
AND WHEN A BUS THERMINAL IS FLOATING
(HIGH IMPEDANCE STATE), IT IS REQUESTED
TO FIX THE INPUT LEVEL BY MEANS OF
EXTERNAL PULL DOWN OR PULL UP
RESISTOR.
PIN CONNECTION (top view)
HC245
HC640
HC643
October 1993
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M54HC245 pdf
M54/M74HC245/640/643
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC CL
(V) (pF)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
Unit
tTLH Output Transition 2.0
tTHL Time
4.5 50
25 60 75 90
7 12 19 18 ns
6.0 6 10 13 15
tPLH Propagation
tPHL Delay Time
2.0
4.5 50
33 90
12 18
115 135
23 27 ns
6.0 10 15 20 23
2.0
4.5 150
48 120 150 180
16 24 30 36 ns
6.0 14 20 26 31
tPZL Output Enable
2.0
48 150 190 225
tPZH Time
4.5 50 RL = 1K
16 30
38
45 ns
6.0 14 26 32 38
2.0 63 180 225 270
4.5 150 RL = 1K
21 36
45
54 ns
6.0 18 31 38 46
tPLZ Output Disable
2.0
37 150 190 225
tPHZ Time
4.5 50 RL = 1K
17 30
38
45 ns
6.0 15 26 32 38
CIN
CI/OUT
Input Capacitance
Output
Capacitance
DIR, G
An, Bn
5 10 10 10 pF
13 pF
CPD (*) Power Dissipation
Capacitance
HC245
HC640/643
39
37
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/8 (per circuit)
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M54HC245 arduino
M54/M74HC245/640/643
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
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