PI5C3244 8-Bit, 2-Port Bus Switch Features Description ÎÎNear-Zero propagation delay 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. ÎÎ5-ohm switches connect inputs to outputs ÎÎDirect bus connection when switches are ON ÎÎUltra Low Quiescent Power (0.2μA typical) àà Ideally suited for notebook applications ÎÎPin compatible with 74 Series 244 logic devices ÎÎPackaging (Pb-free & Green): àà 20-pin 173-mil wide plastic TSSOP (L) àà 20-pin 150-mil wide plastic QSOP (Q) Pin Configuration Block Diagram BE1 1A0 1B0 1A1 1B1 1A2 1B2 1A3 1B3 BE1 1A0 2B3 1A1 1 20 VCC 2 3 4 19 18 17 BE2 1B0 2A3 2B2 5 6 7 16 15 14 1B1 8 9 10 13 12 11 2A1 1A2 2B1 BE2 1A3 2A0 2B0 2A1 2B1 2A2 2B2 2A3 2B3 2B0 GND 2A2 1B2 1B3 2A0 Pin Description Truth Table(1) BE1 BE2 1A, 1B 2A, 2B Pin Name H H Disconnect Disconnect BEn L H 1A = 1B Disconnect A0-A3 Bus A H L Disconnect 2A = 2B B0-B3 Bus B L L 1A = 1B 2A = 2B GND Ground Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance All trademarks are property of their respective owners. VCC 11-0025 1 Description Bus Enable Input (Active LOW) Power www.pericom.com PS8140F 10/12/10 PI5C3244 8-Bit, 2-Port Bus Switch Absolute Maximum Ratings Parameter Min. Max. Units Storage Temperature -65 150 o C Ambient Temperature with Power Applied -40 85 o C Supply Voltage to Ground Potential (Inputs & Vcc Only) -0.5 7.0 V Supply Voltage to Ground Potential (Outputs & D/O Only) -0.5 7.0 V DC Input Voltage -0.5 7.0 V DC Output Current - 120 mA Power Dissipation - 0.5 W Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±5%) Parameters Description Test Conditions(1) Min VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level -0.5 IIH Input HIGH Current IIL Input LOW Current IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC VIK Clamp Diode Voltage VCC = Min, IIN = -18mA -0.7 IOS Short Circuit Current(3) A (B) = 0V, B (A) = VCC 100 VH Input Hysteresis at Control Pins RON Switch On Resistance(4) Typ (2) Max Units V 0.8 V VCC = Max., VIN = VCC ±1 μA VCC = Max., VIN = GND ±1 μA ±1 μA -1.2 V mA 150 mV VCC = Min, VIN = 0.0V, ION = 48 mA 5 7 VCC = Min, VIN = 2.4V, ION = 15 mA 10 15 Ω Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, TA = 25°C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. Measured by the voltage drop between A and B pin at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (A,B) pins. Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) Description Test Conditions Typ Units CIN Input Capacitance VIN = 0V 6 pF COFF A/B Capacitance, Switch Off VIN = 0V 6 pF CON A/B Capacitance, Switch On VIN = 0V 12 pF Notes: 1. This parameter is determined by device characterization but is not production tested. All trademarks are property of their respective owners. 11-0025 2 www.pericom.com PS8140F 10/12/10 PI5C3244 8-Bit, 2-Port Bus Switch Power Supply Characteristics Parameters Description ICC Quiescent Power Supply VCC = Max. Current VIN = GND or VCC ΔICC Supply Current @ Input VCC = Max. HIGH VIN = 3.4V(3) ICCD Supply Current per Input per MHz(4) Test Conditions(1) Min Typ (2) Max Units 0.1 3.0 μA 2.5 mA 0.25 mA/ MHz VCC = Max. A and B Pins Open BE1 or BE2 = GND Control Input Toggling 50% Duty Cycle Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to Icc. 4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design. Switching Characteristics over Operating Range Com. Parameters Description tPLH tPHL Propagation Delay(1,2) Ax to Bx tPZH tPZL Bus Enable Time BEx to Ax or Bx tPHZ tPLZ Bus Disable Time BEx to Ax or Bx Test Conditions Min Max Units 0.25 CL = 50 pF R L = 500Ω 1.5 5.6 1.5 5.2 ns Notes: 1. This parameter is guaranteed but not tested on Propagation Delays. 2. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25 ns for 50 pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side. All trademarks are property of their respective owners. 11-0025 3 www.pericom.com PS8140F 10/12/10 PI5C3244 8-Bit, 2-Port Bus Switch Packaging Mechanical: 20-pin TSSOP (L20) DOCUMENT CONTROL NO. PD - 1311 20 REVISION: E DATE: 03/09/05 .169 .177 1 .252 .260 6.4 6.6 .004 0.09 .008 0.20 .047 1.20 Max 1 .0256 BSC 0.65 4.3 4.5 .007 .012 0.19 0.30 0.45 0.75 SEATING PLANE .238 .269 6.1 6.7 .002 0.05 .006 0.15 Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2336 • www.pericom.com Note: 1. Package Outline Exclusive of Mold Flash and Metal Burr 2. Controlling dimentions in millimeters 3. Ref: JEDEC MO-153F/AC All trademarks are property of their respective owners. .018 .030 11-0025 DESCRIPTION: 20-Pin, 173-Mil Wide, TSSOP PACKAGE CODE: L 4 www.pericom.com PS8140F 10/12/10 PI5C3244 8-Bit, 2-Port Bus Switch Packaging Mechanical: 20-pin QSOP (Q20) DOCUMENT CONTROL NO. PD - 1202 20 REVISION: H .008 0.20 MIN. .150 .157 3.81 3.99 DATE: 10/22/07 .008 .013 0.20 0.33 Guage Plane .010 0.254 1 Detail A .337 8.56 .344 8.74 0˚-6˚ .016 .035 0.41 0.89 .041 1.04 REF .058 REF 1.47 .015 x 45˚ 0.38 .053 1.35 .069 1.75 Detail A 1 SEATING PLANE .025 BSC 0.635 .004 0.101 .010 0.254 .008 0.203 .012 0.305 .007 .010 0.178 0.254 .228 .244 5.79 6.19 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 • www.pericom.com Note: 1) Controlling dimensions in inches. 2) Ref: JEDEC MO-137B/AD 3) Dimensions do not include mold flash, protrusions or gate burrs DESCRIPTION: 20-Pin, 150-Mil Wide, QSOP PACKAGE CODE: Q Ordering Information Ordering Code Package Code Package Type PI5C3244LEX L Pb-free & Green, 20-pin TSSOP PI5C3244QEX Q Pb-free & Green, 20-pin QSOP 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 All trademarks are property of their respective owners. 11-0025 5 www.pericom.com PS8140F 10/12/10