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M74HCT245 Datasheet

OCTAL BUS TRANSCEIVER

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M74HCT245 pdf
M74HCT245
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS (NON INVERTED)
s HIGH SPEED:
tPD = 13ns (TYP.) at VCC = 4.5V
s LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
s COMPATIBLE WITH TTL OUTPUTS :
VIH = 2V (MIN.) VIL = 0.8V (MAX)
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 6mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH tPHL
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 245
DESCRIPTION
The M74HCT245 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
DIR input. The enable input G can be used to
disable the device so that the buses are effectively
isolated.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
T&R
DIP
SOP
TSSOP
M74HCT245B1R
M74HCT245M1R M74HCT245RM13TR
M74HCT245TTR
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.
PIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
1/9


STMicroelectronics Electronic Components Datasheet

M74HCT245 Datasheet

OCTAL BUS TRANSCEIVER

No Preview Available !

M74HCT245 pdf
M74HCT245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 3, 4, 5, 6,
7, 8, 9
18, 17, 16,
15, 14, 13,
12, 11
19
10
20
SYMBOL
DIR
A1 to A8
NAME AND FUNCTION
Directional Control
Data Inputs/Outputs
B1 to B8 Data Inputs/Outputs
G
GND
VCC
Output Enable Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
G
L
L
H
X : Don’t Care
Z : High Impedance
DIR
L
H
X
FUNCTION
A BUS
OUTPUT
INPUT
Z
B BUS
INPUT
OUTPUT
Z
OUTPUT
Yn
A=B
B=A
Z
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7
V
VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
± 20
mA
IOK DC Output Diode Current
± 20
mA
IO DC Output Current
± 35
mA
ICC or IGND DC VCC or Ground Current
± 70
mA
PD Power Dissipation
500(*)
mW
Tstg Storage Temperature
-65 to +150
°C
TL Lead Temperature (10 sec)
300 °C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 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
Parameter
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time (VCC = 4.5 to 5.5V)
Value
4.5 to 5.5
0 to VCC
0 to VCC
-55 to 125
0 to 500
Unit
V
V
V
°C
ns
2/9


Part Number M74HCT245
Description OCTAL BUS TRANSCEIVER
Maker ST Microelectronics
Total Page 9 Pages
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