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PDF TC74VHC245FK Data sheet ( Hoja de datos )

Número de pieza TC74VHC245FK
Descripción OCTAL BUS TRANSCEIVER
Fabricantes Toshiba　
Logotipo Toshiba Logotipo



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TC74VHC245F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC245F, TC74VHC245FT, TC74VHC245FK
Octal Bus Transceiver
The TC74VHC245 is an advanced high speed CMOS OCTAL
BUS TRANSCEIVER fabricated with silicon gate C2MOS
technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
It is intended for two-way asynchronous communication
between data busses. The direction of data transmission is
determined by the level of the DIR input.
The enable input ( G ) can be used to disable the device so that
the busses are effectively isolated.
All inputs are equipped with protection circuits against static
discharge.
Features (Note 1) (Note 2) (Note 3)
• High speed: tpd = 4.0 ns (typ.) at VCC = 5 V
• Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28% VCC (min)
• Balanced propagation delays: tpLH ∼− tpHL
• Wide operating voltage range: VCC (opr) = 2 V to 5.5 V
• Low noise: VOLP = 1.0 V (max)
• Pin and function compatible with 74ALS245
Note 1: Do not apply a signal to any bus terminal when it is in
the output mode. Damage may result.
Note 2: All floating (high impedance) bus terminals must have
their input levels fixed by means of pull up or pull down
resistors.
Note 3: A parasitic diode is formed between the bus and VCC
terminals. Therefore bus terminal can not be used to
interface 5 V to 3 V systems directly.
TC74VHC245F
TC74VHC245FT
TC74VHC245FK
Weight
SOP20-P-300-1.27A
TSSOP20-P-0044-0.65A
VSSOP20-P-0030-0.50
: 0.22 g (typ.)
: 0.08 g (typ.)
: 0.03 g (typ.)
Start of commercial production
1991-05
1 2014-03-01

1 page




TC74VHC245FK pdf
Input Equivalent Circuit
DIR, G
INPUT
TC74VHC245F/FT/FK
Bus Terminal Equivalent Circuit
An, Bn
I/O
5 2014-03-01

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