PI74LPT646 데이터 시트보기 (PDF) - Pericom Semiconductor
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PI74LPT646 Datasheet PDF : 6 Pages
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PI74LPT646
PI74LPT652
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PI74LPT652
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Fast CMOS 3.3V 8-Bit
Registered Transceiver
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)
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 24-pin 173-mil wide plastic TSSOP (L)
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 150-mil wide plastic TQSOP (R)
– 24-pin 300-mil wide plastic SOIC (S)
Logic Block Diagram
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.
The PI74LPT646 and PI74LPT652 are designed with a bus
transceiver 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 storage registers. The PI74LPT652 utilizes
GAB and GBA signals to control the transceiver functions. The
PI74LPT646 utilizes the enable control (G) and direction pins
(DIR) to control the transceiver functions. SAB and SBA control
pins are used to select either 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 PI74LPT646 and PI74LPT652 can be driven from either 3.3V
or 5.0V devices allowing this device to be used as a translator in a
mixed 3.3/5.0V system.
PI74LPT646
ONLY
G
PI74LPT652 ONLY
GBA
GAB
DIR
CPBA
SBA
CPAB
SAB
1 OR 8 CHANNELS
A REG
A0
0D
C0
B REG
0D
C0
B0
TO 7 OTHER CHANNELS
1
PS2064A 01/15/97
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