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PDF 74ACT245 Data sheet ( Hoja de datos )
| Número de pieza | 74ACT245 | |
| Descripción | OCTAL BUS TRANSCEIVER 3-STATE | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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74ACT245
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS (NON INVERTED)
s HIGH SPEED: tPD = 5.4ns (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 50Ω TRANSMISSION LINE DRIVING
CAPABILITY
DIP
SOP
TSSOP
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN)
s BALANCED PROPAGATION DELAYS:
t(s)tPLH ≅ tPHL
s OPERATING VOLTAGE RANGE:
cVCC (OPR) = 4.5V to 5.5V
us PIN AND FUNCTION COMPATIBLE WITH
rod74 SERIES 245
s IMPROVED LATCH-UP IMMUNITY
te PDESCRIPTION
leThe 74ACT245 is an advanced high-speed CMOS
oOCTAL BUS TRANSCEIVER (3-STATE)
sfabricated with sub-micron silicon gate and
bdouble-layer metal wiring C2MOS tecnology.
OThis IC is intended for two-way asynchronous
-communication between data buses and the
)direction of data transmission is determined by
t(sDIR input. The enable input G can be used to
cdisable the device so that the buses are effectively
uisolated.
Obsolete ProdPIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
DIP
SOP
TSSOP
TUBE
74ACT245B
74ACT245M
T&R
74ACT245MTR
74ACT245TTR
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
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 THERMINAL IS FLOATING (HIGH
IMPEDANCE STATE) IT IS REQUIRED TO FIX
THE INPUT LEVEL BY MEANS OF EXTERNAL
PULL DOWN OR PULL UP RESISTOR.
April 2001
1/9
1 page  
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
74ACT245
Obsolete Product(s) - Obsolete Product(s)WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 74ACT245.PDF ] | |
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