PI74LPT16501 Datasheet, PDF (1/5 Pages) Pericom Semiconductor Corporation – Fast CMOS 18-Bit Registered Transceivers

PI74LPT16501
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Fast CMOS 18-Bit Registered Transceivers ¹
Product Features
• Compatible with LCX™ and LVT™ families of products
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
– Output can be 3V or connected to 5V bus
• Advanced Low Power CMOS Operation
• Excellent output drive capability:
Balanced drives (24 mA sink and source)
• Pin compatible with industry standard double-density
pinouts
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Multiple center pins and distributed Vcc/GND pins
minimize switching noise
• Packages available:
– 56-pin 240 mil wide plastic TSSOP (A)
– 56-pin 300 mil wide plastic SSOP (V)
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Product Description
Pericom Semiconductor’s PI74LPT series of logic circuits are pro-
duced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
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The PI74LPT16501 is an 18-bit registered bus transceiver designed
with D-type latches and flip-flops to allow data flow in transparent,
latched, and clocked modes. The Output Enable (OEAB and
4 ^{OEBA, Latch Enable (LEAB and LEBA) and Clock (CLKAB and}
CLKBA) inputs control the data flow in each direction. When
LEAB is HIGH, the device operates in transparent mode for A-to-
5 ^{B data flow. When LEAB is LOW, the A data is latched if CLKAB}
is held at a HIGH or LOW logic level. The A bus data is stored in
the latch/flip-flop on the LOW-to-HIGH transition of CLKAB, if
LEAB is LOW. OEAB performs the output enable function on the
6 ^{B port. Data flow from B port to A port is similar using OEBA,}
LEBA and CLKBA. This high-speed, low power device offers a
flow-through organization for ease of board layout.
The PI74LPT16501 can be driven from either 3.3V or 5.0V devices
7 ^{allowing this device to be used as a translator in a mixed}
3.3V/5.0V system.
Logic Block Diagram
OEAB
CLKBA
LEBA
OEBA
CLKAB
LEAB
A1
C
C
D
D
8
9
10
11
12
B1
13
C
C
D
D
TO 17 OTHER CHANNELS
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15
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PS2071A 01/16/97