PI74LPT16646 Datasheet, PDF (1/6 Pages) Pericom Semiconductor Corporation – Fast CMOS 3.3V 16-Bit Registered Transceivers

PI74LPT16646
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PI74LPT16646 _{1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122}
Fast CMOS 3.3V 16-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)
Product Description
2
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.
3 _{The PI74LPT16646 is a 16-bit registered transceiver organized as}
two independent 8-bit bus transceivers designed with 3-state
D-type flip-flops and control circuitry arranged for multiplexed
transmission of data directly from the data bus or from the internal
4 ^{storage registers. Each 8-bit transceiver utilizes the enable control}
(xOE) and direction pins (xDIR) to control the transceiver functions.
The Select (xSAB and xSBA) control pins are used to select either
5 ^{real-time or stored data transfer. The circuitry used for select control}
will eliminate the typical decoding glitch that occurs in a multiplexer
during the transition between real-time and stored data. A low input
level selects real-time data and a high selects stored data.
The PI74LPT16646 can be driven from either 3.3V or 5.0V devices
6 ^{allowing this device to be used as a translator in a mixed}
3.3/5.0V system.
7
Logic Block Diagram
1OE
1DIR
1CLKBA
1SBA
1CLKAB
1SAB
1A0
A REG
D
C
B REG
D
C
2OE
2DIR
2CLKBA
2SBA
2CLKAB
2SAB
2A0
1B0
A REG
D
C
8
9
10
11
B REG
D
12
C
2B0
13
14
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
15
1
PS2073A 01/16/97