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PDF 74VHCT541A Data sheet ( Hoja de datos )
| Número de pieza | 74VHCT541A | |
| Descripción | OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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74VHCT541A
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (NON INVERTED)
s HIGH SPEED: tPD = 4.1 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA=25°C
s COMPATIBLE WITH TTL OUTPUTS:
VIH = 2V (MIN.), VIL = 0.8V (MAX)
s POWER DOWN PROTECTION ON INPUTS
& OUTPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s OPERATING VOLTAGE RANGE:
VCC(OPR) = 4.5V to 5.5V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 541
s IMPROVED LATCH-UP IMMUNITY
s LOW NOISE: VOLP = 0.9V (MAX.)
DESCRIPTION
The 74VHCT541A is an advanced high-speed
CMOS OCTAL BUS BUFFER (3-STATE)
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology.
The 3 STATE control gate operates as two input
AND such that if either G1 and G2 are high, all
eight outputs are in the high impedance state.
SOP
TSSOP
Table 1: Order Codes
PACKAGE
SOP
TSSOP
T&R
74VHCT541AMTR
74VHCT541ATTR
In order to enhance PC board layout, the
74VHCT541 offers a pinout having inputs and
outputs on opposite sides of the package.
Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
device can be used to interface 5V to 3V since all
inputs are equipped with TTL threshold.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
Figure 1: Pin Connection And IEC Logic Symbols
December 2004
Rev. 4
1/12
1 page  
Figure 3: Test Circuit
74VHCT541A
tPLH, tPHL
tPZL, tPLZ
tPZH, tPHZ
TEST
CL =15/50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 1KΩ or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle)
SWITCH
Open
VCC
GND
5/12
5 Page 
Table 10: Revision History
Date
16-Dec-2004
Revision
4
Description of Changes
Order Codes Revision - pag. 1.
74VHCT541A
11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 74VHCT541A.PDF ] | |
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