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PI5C3244Q

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仕様・特性

PI5C3244 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 8-Bit, 2-Port Switch Features: Description: • • • • Near-Zero propagation delay 5-ohm switches connect inputs to outputs when enabled Direct bus connection when switches are ON Ultra Low Quiescent Power (0.2μA typical) – Ideally suited for notebook applications • Pin compatible with 74 Series 244 logic devices • Packaging (Pb-free & Green Available): – 20-pin 173-mil wide plastic TSSOP (L) – 20-pin 150-mil wide plastic QSOP (Q) – 20-pin 300-mil wide plastic SOIC (S) Pericom Semiconductor’s PI5C3244 features a set of eight bus switches which is pinout and function compatible with the PI74FCT244T, 74F244, and 74ALS/AS/LS 244 8-bit drivers. Two enable signals (BEn) turn the switches on similar to the enable signals of the 244. The bus switch creates no additional propagation delay or ground bounce noise. Block Diagram Pin Configuration BE1 1B0 1A1 BE1 1A0 2B3 1B1 1A2 20 19 18 VCC BE2 1B0 4 5 6 17 16 15 2A3 7 8 14 13 1B2 9 10 12 11 1B3 2B2 1B2 1A3 1 2 3 1A1 1A0 1B3 1A2 2B1 1A3 2B0 BE2 GND 2A0 2A0 2B2 2A3 2A1 2B1 2A2 2A2 2B0 2A1 1B1 2B3 Truth Table(1) BE1 H L H L BE2 H H L L Pin Description 1A, 1B Disconnect 1A = 1B Disconnect 1A = 1B 2A, 2B Disconnect Disconnect 2A = 2B 2A = 2B Pin Name BEn A0-A3 B0-B3 GND VCC Note: 1. H = High Voltage Level L = Low Voltage Level 06-0239 1 Description Bus Output Enable (Active LOW) Bus A Bus B Ground Power PS7014E 05/12/06

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