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M74HC245 Datasheet

OCTAL BUS TRANSCEIVER

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M74HC245 pdf
M74HC245
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS (NON INVERTED)
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.)
t(ss SYMMETRICAL OUTPUT IMPEDANCE:
c|IOH| = IOL = 6mA (MIN)
us BALANCED PROPAGATION DELAYS:
dtPLH tPHL
ros WIDE OPERATING VOLTAGE RANGE:
PVCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
te74 SERIES 245
oleDESCRIPTION
bsThe M74HC245 is an advanced high-speed
CMOS OCTAL BUS TRANSCEIVER (3-STATE)
Ofabricated with silicon gate C2MOS technology.
-This IC is intended for two-way asynchronous
t(s)communication between data buses, and the
direction of data transmission is determined by
cDIR input. The enable input G can be used to
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC245B1R
M74HC245M1R
T&R
M74HC245RM13TR
M74HC245TTR
disable the device so that the buses are effectively
isolated.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
Obsolete ProduPIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/10


STMicroelectronics Electronic Components Datasheet

M74HC245 Datasheet

OCTAL BUS TRANSCEIVER

No Preview Available !

M74HC245 pdf
M74HC245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL NAME AND FUNCTION
1 DIR Directional Control
2, 3, 4, 5, 6, A1 to A8 Data Inputs/Outputs
7, 8, 9
18, 17, 16,
15, 14, 13,
12, 11
B1 to B8 Data Inputs/Outputs
19 G Output Enable Input
10 GND Ground (0V)
20 VCC Positive Supply Voltage
)TRUTH TABLE
ct(sINPUTS
uG
rodL
L
PH
teX : Don’t Care
leZ : High Impedance
DIR
L
H
X
FUNCTION
A BUS
OUTPUT
INPUT
Z
B BUS
INPUT
OUTPUT
Z
OUTPUT
Yn
A=B
B=A
Z
soABSOLUTE MAXIMUM RATINGS
bSymbol
Parameter
Value
Unit
- OVCC Supply Voltage
-0.5 to +7
V
t(s)VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
ucIIK DC Input Diode Current
± 20
mA
dIOK DC Output Diode Current
± 20
mA
roIO DC Output Current
± 35
mA
PICC or IGND DC VCC or Ground Current
± 70
mA
tePD Power Dissipation
500(*)
mW
leTstg Storage Temperature
-65 to +150
°C
oTL Lead Temperature (10 sec)
300 °C
sAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
bnot implied
O(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
VO
Top
tr, tf
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time
Parameter
VCC = 2.0V
VCC = 4.5V
VCC = 6.0V
Value
2 to 6
0 to VCC
0 to VCC
-55 to 125
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
°C
ns
ns
ns
2/10


Part Number M74HC245
Description OCTAL BUS TRANSCEIVER
Maker ST Microelectronics
Total Page 10 Pages
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