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PI74AVC+16501K Datasheet

  • PI74AVC+16501K

  • 18-Bit Bus Transceiver

  • 512.52KB

  • 10頁(yè)

  • ETC

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PI74AVC+16501
18-Bit Universal Bus Transceiver
With 3-State Outputs
Product Features
鈥?/div>
PI74AVC+16501 is designed for low voltage operation,
V
CC
= 1.65V to 3.6V
鈥?/div>
True 鹵24mA Balanced Drive @ 3.3V
鈥?/div>
I
OFF
supports partial Power-down operation
鈥?/div>
3.6V I/O Tolerant inputs and outputs
鈥?/div>
All outputs contain a potential DDC (Dynamic Drive Control)
that reduces noise without degradating propagation delay.
鈥?/div>
Industrial operation at 聳40擄C to +85擄C
鈥?/div>
Packages available:
聳 56-pin 240 mil wide plastic TSSOP (A)
聳 56-pin 173 mil wide plastic TVSOP (K)
Product Description
Pericom Semiconductor聮s PI74AVC+ series of logic circuits are
produced using the Company聮s advanced 0.35 micron CMOS
technology, achieving industry leading speed.
The 18-bit PI74AVC+ 16501 univeral bus transceiver is designed for
1.65V to 3.6V V
CC
operation.
Data flow in each direction is controlled by Output Enable (OEAB
and OEBA), Latch Enable (LEAB and LEBA), and CLOCK (CLKAB
and CLKBA) inputs. For A-to-B data flow, the device operates in
the transparent mode when LEAB is HIGH. When LEAB is LOW,
the A data is latched if CLKAB is held at a high or low logic level.
If LEAB is LOW, the A-bus data is stored in the latch/flip-flop on
the low-to-high transition of CLKAB. When OEAB is HIGH, the
outputs are active. When OEAB is LOW, the outputs are in the high-
impedance state.
Data flow for B to A is similar to that of A to B but uses OEBA, LEBA,
and CLKBA. The Output Enables are complementary (OEAB is
active HIGH and OEBA is active LOW)
To ensure the high-impedance state during power up or power
down, OEBA should be tied to V
CC
through a pull-up resistor and
OEAB should be tied to GND through a pulldown resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
Logic Block Diagram
OEAB 1
CLKAB 55
LEAB 2
LEBA 28
CLKBA 30
OEBA 27
A1 3
1D
C1
CLK
C1
1D
C1
1D
CLK
54
B1
TO 17 OTHER CHANNELS
1
PS8541
05/01/01

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