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74HC245 Datasheet(PDF) 5 Page - NXP Semiconductors

Part # 74HC245
Description  Octal bus transceiver; 3-state
Download  22 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC245 Datasheet(HTML) 5 Page - NXP Semiconductors

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9397 750 14502
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 31 January 2005
5 of 22
Philips Semiconductors
74HC245; 74HCT245
Octal bus tranceiver; 3-state
7.
Functional description
7.1 Function table
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
8.
Limiting values
[1]
For DIP20 packages: above 70
°C, Ptot derates linearly with 12 mW/K.
For SO20 packages: above 70
°C, Ptot derates linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60
°C, Ptot derates linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60
°C, Ptot derates linearly with 4.5 mW/K.
B1
17
data input/output
B0
18
data input/output
OE
19
output enable input (active LOW)
VCC
20
supply voltage
Table 3:
Pin description …continued
Symbol
Pin
Description
Table 4:
Function table [1]
Input
Input/output
OE
DIR
An
Bn
L
L
A = B
input
L
H
input
B = A
HX
Z
Z
Table 5:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to
GND (ground = 0 V).
Symbol
Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
−0.5
+7
V
IIK
input diode current
VI < −0.5 V or VI >VCC + 0.5 V
-
±20
mA
IOK
output diode current
VO < −0.5 V or
VO >VCC + 0.5 V
-
±20
mA
IO
output source or sink
current
VO = −0.5 V to VCC + 0.5 V
-
±35
mA
ICC, IGND
VCC or GND current
-
±70
mA
Tstg
storage temperature
−65
+150
°C
Ptot
total power dissipation
[1]
DIP20 package
-
750
mW
SO20, SSOP20,
TSSOP20 and
DHVQFN20 packages
-
500
mW


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