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PDF M74HC643 Data sheet ( Hoja de datos )
| Número de pieza | M74HC643 | |
| Descripción | OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS INVERTING/NON INVERTING | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M74HC643
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS (INVERTING/NON INVERTING)
s HIGH SPEED:
tPD = 10ns (TYP.) at VCC = 6V
s LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28 % VCC (MIN.)
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 6mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 643
DESCRIPTION
The 74HC643 is an advanced high-speed CMOS
OCTAL BUS TRANSCEIVER (3-STATE)
fabricated with silicon gate C2MOS technology.
This IC is intended for two-way asynchronous
communication between data buses, and the
direction of data transmission is determined by
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC643B1R
M74HC643M1R
T&R
M74HC643RM13TR
M74HC643TTR
DIR input. The enable input G can be used to
disable the device so that the buses are effectively
isolated.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
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1 page  
M74HC643
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition
Value
Symbol
Parameter
tTLH tTHL Output Transition
Time
tPLH tPHL Propagation Delay
Time
tPZL tPZH High Impedance
Output Enable
Time
tPLZ tPHZ High Impedance
Output Disable
Time
VCC CL
(V) (pF)
2.0
4.5 50
6.0
2.0
4.5 50
6.0
2.0
4.5 150
6.0
2.0
4.5 50
6.0
2.0
4.5 150
6.0
2.0
4.5 50
6.0
RL = 1 KΩ
RL = 1 KΩ
RL = 1 KΩ
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min.
Typ. Max.
25 60
7 12
6 10
33 90
12 18
10 15
48 120
16 24
14 20
48 150
16 30
14 26
63 180
21 36
18 31
37 150
17 30
15 26
Min.
Max.
75
19
13
115
23
20
150
30
26
190
38
32
225
45
38
190
38
32
Min.
Max.
90
18
15
135
27
23
180
36
31
225
45
38
270
54
46
225
45
38
ns
ns
ns
ns
ns
ns
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance
DIR, G
5 10 10 10 pF
CI/OUT
Output
Capacitance
An, Bn
13
pF
CPD Power Dissipation
Capacitance (note
1)
37
pF
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)
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M74HC643
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
© The ST logo is a registered trademark of STMicroelectronics
© 2001 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco
Singapore - Spain - Sweden - Switzerland - United Kingdom
© http://www.st.com
11/11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet M74HC643.PDF ] | |
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