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PDF 74LVC244A Data sheet ( Hoja de datos )
| Número de pieza | 74LVC244A | |
| Descripción | LOW VOLTAGE CMOS QUAD BUS BUFFERS | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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74LVC244A
LOW VOLTAGE CMOS QUAD BUS BUFFERS (3-STATE)
HIGH PERFORMANCE
s 5V TOLERANT INPUTS
s HIGH SPEED: tPD = 5.9ns (MAX.) at VCC = 3V
s POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
)|IOH| = IOL = 24mA (MIN) at VCC = 3V
t(ss PCI BUS LEVELS GUARANTEED AT 24 mA
cs BALANCED PROPAGATION DELAYS:
utPLH ≅ tPHL
ds OPERATING VOLTAGE RANGE:
roVCC(OPR) = 1.65V to 3.6V (1.2V Data
PRetention)
tes PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
les LATCH-UP PERFORMANCE EXCEEDS
o500mA (JESD 17)
bss ESD PERFORMANCE:
OHBM > 2000V (MIL STD 883 method 3015);
-MM > 200V
t(s)DESCRIPTION
The 74LVC244A is a low voltage CMOS OCTAL
ucBUS BUFFER (3-STATE) fabricated with
dsub-micron silicon gate and double-layer metal
rowiring C2MOS technology. It is ideal for 1.65 to 3.6
PVCC operations and low power and low noise
applications.
SOP
TSSOP
Table 1: Order Codes
PACKAGE
SOP
TSSOP
T&R
74LVC244AMTR
74LVC244ATTR
It can be interfaced to 5V signal environment for
inputs in mixed 3.3/5V system.
G control output governs four BUS BUFFERs.
This device is designed to be used with 3 state
memory address drivers, etc.
It has more speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
ObsoleteFigure 1: Pin Connection And IEC Logic Symbols
July 2004
.
Rev. 5
1/12
1 page  
Figure 3: Test Circuit
74LVC244A
ct(s)RT = ZOUT of pulse generator (typically 50Ω)
duTable 10: Test Circuit And Waveform Symbol Value
ProSymbol
leteCL
soRL = R1
bVS
OVIH
-VM
t(s)VOH
VX
ucVY
dtr = 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
Obsolete ProFigure 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
5
Description of Changes
Ordering Codes Revision - pag. 1.
74LVC244A
Obsolete Product(s) - Obsolete Product(s)
11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 74LVC244A.PDF ] | |
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