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PDF 74LVC245A Data sheet ( Hoja de datos )
| Número de pieza | 74LVC245A | |
| Descripción | LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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74LVC245A
LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER
(NOT INVERTED) HIGH PERFORMANCE
s 5V TOLERANT INPUTS
s HIGH SPEED: tPD = 6.3ns (MAX.) at VCC = 3V
s POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN) at VCC = 3V
s PCI BUS LEVELS GUARANTEED AT 24 mA
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s OPERATING VOLTAGE RANGE:
VCC(OPR) = 1.65V to 3.6V (1.2V Data
Retention)
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 245
s LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
s ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LVC245A is a low voltage CMOS OCTAL
BUS TRANSCEIVER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS technology. It is ideal for 1.65 to 3.6
VCC operations and low power and low noise
applications.
This IC is intended for two-way asynchronous
communication between data buses and the
SOP
TSSOP
Table 1: Order Codes
PACKAGE
SOP
TSSOP
T&R
74LVC245AMTR
74LVC245ATTR
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.
It has more speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs are equipped with protection circuits
against static discharge, giving them 2KV ESD
immunity and transient excess voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
Figure 1: Pin Connection And IEC Logic Symbols
July 2004
.
Rev. 4
1/12
1 page  
Figure 3: Test Circuit
74LVC245A
RT = ZOUT of pulse generator (typically 50Ω)
Table 10: Test Circuit And Waveform Symbol Value
Symbol
CL
RL = R1
VS
VIH
VM
VOH
VX
VY
tr = tr
1.65 to 1.95V
30pF
1000Ω
2 x VCC
VCC
VCC/2
VCC
VOL + 0.15V
VOH - 0.15V
<2.0ns
2.3 to 2.7V
30pF
500Ω
2 x VCC
VCC
VCC/2
VCC
VOL + 0.15V
VOH - 0.15V
<2.0ns
VCC
2.7V
50pF
500Ω
6V
2.7V
1.5V
3.0V
VOL + 0.3V
VOH - 0.3V
<2.5ns
Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle)
3.0 to 3.6V
50pF
500Ω
6V
2.7V
1.5V
3.0V
VOL + 0.3V
VOH - 0.3V
<2.5ns
5/12
5 Page 
Table 11: Revision History
Date
26-Jul-2004
Revision
4
Description of Changes
Ordering Codes Revision - pag. 1.
74LVC245A
11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 74LVC245A.PDF ] | |
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