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74LVQ245 датащи(PDF) 1 Page - STMicroelectronics

номер детали 74LVQ245
подробное описание детали  LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER 3-STATE
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74LVQ245 датащи(HTML) 1 Page - STMicroelectronics

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74LVQ245
LOW VOLTAGE CMOS OCTAL BUS
TRANSCEIVER (3-STATE)
®
March 1999
ORDER CODES :
74LVQ245M
74LVQ245T
M
(Micro Package)
s
HIGH SPEED: tPD = 6 ns (TYP.) at VCC = 3.3V
s
COMPATIBLE WITH TTL OUTPUTS
s
LOW POWER DISSIPATION:
ICC =5
µA (MAX.) at TA =25 oC
s
LOW NOISE: VOLP = 0.5V (TYP.) at VCC = 3.3V
s
75
Ω TRANSMISSION LINE DRIVING
CAPABILITY
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|=IOL = 12 mA (MIN)
s
PCI BUS LEVELS GUARANTEED AT 24mA
s
BALANCED PROPAGATION DELAYS:
tPLH
≅ tPHL
s
OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 3.6V (1.2VData Retention)
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 245
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The LVQ245 is a low voltage CMOS OCTAL BUS
TRANSCEIVER
(3-STATE)
fabricated
with
sub-micron silicon gate and double-layer metal
wiring C
2MOS technology. It is ideal for low
power and low noise 3.3V applications.
It has better speed performance at 3.3V than 5V
LSTTL family combined with the true CMOS low
power consumption.
T
(TSSOP Package)
This IC is intended for two-way asynchronous
communication between data buses; 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.
All inputs
and
outputs are
equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
IT IS PROHIBITED TO APPLY A SIGNAL TO A
TERMINAL WHEN IT IS IN OUTPUT MODE
AND WHEN A BUS TERMINAL 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 AND IEC LOGIC SYMBOLS
1/8


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