FST3244WMX

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The low on resistance allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. 4 Ω Switch Connection between Two Ports Minimal Propagation Delay through the Switch Low ICC Zero Bounce in Flow-through Mode The device is organized as two four-bit switches with separate /OE inputs. When /OE is LOW, the switch is ON and port A is connected to port B. When /OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Control Inputs Compatible with TTL Level Ordering Information Part Number Operating Temperatur e Range FST3244MTCX -40 to +85°C Package Packing Method 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, Tape and 4.4 mm Wide Reel Logic Diagram 1A0 1A3 2 18 1B0 8 12 1B 3 /OE1 1 2A0 11 2A3 17 9 2B 0 3 2B3 /OE2 19 Figure 1. Logic Diagram © 1997 Fairchild Semiconductor Corporation FST3244 • Rev. 1.0.4 www.fairchildsemi.com FST3244 — 8-Bit Bus Switch December 2012 FST3244 — 8-Bit Bus Switch Pin Configurations /OE1 1 20 VCC 1A0 2 19 /OE2 2B3 3 18 1B0 1A1 4 17 2A3 2B2 5 16 1B1 1A2 6 15 2A2 2B1 7 14 1B2 1A3 8 13 2A1 2B0 9 12 1B3 GND 10 11 2A0 Figure 2. Pin Configuration Pin Descriptions Pin # Pin Names Description 1,19 /OE1, /OE2 Bus Switch Enables 2,4,6,8,11,13,15,17 1A, 2A Bus A 3,5,7,9,12,14, 16,18 1B, 2B Bus B 20 VCC Supply Voltage 10 GND Ground Truth Table Inputs Inputs/Outputs /OE1 /OE2 1A, 1B 2A, 2B LOW LOW 1A = 1B 2A = 2B LOW HIGH 1A = 1B High Impedance HIGH LOW High Impedance 2A = 2B HIGH HIGH High Impedance High Impedance © 1997 Fairchild Semiconductor Corporation FST3244 • Rev. 1.0.4 www.fairchildsemi.com 2 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit -0.5 7.0 V 7.0 V VCC Supply Voltage VS DC Switch Voltage -0.5 VIN (1) DC Input Voltage -0.5 7.0 V IIK DC Input Diode Current VIN