Product Description
Pericom Semiconductor’s PI74LPT series of logic circuits are produced 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.

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)