PI5C16244/162244 16-BIT BUS SWITCH BUFFER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI5C16244 Ω) PI5C162244 (25Ω 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 16-Bit BusSwitch Product Features: • Near-zero propagation delay • 5Ω switches connect inputs to outputs when enabled • Direct bus connection when switches are ON • Ultra-low quiescent power (0.2 µA typical) – Ideally suited for notebook applications • Pin compatible with 74 series16244 • Industrial operating temperature: –40°C to +85°C • Packages available: – 48-pin 240 mil wide thin plastic TSSOP (A) – 48-pin 300 mil wide plastic SSOP (V) – 48-pin 150 mil wide plastic BQSOP (B) Product Description: Pericom Semiconductor’s PI5C series of logic circuits are produced in the Company’s advanced 0.6 micron CMOS technology. The PI5C16244 and PI5C162244 are 16-bit, 4-port bus switches that are pin compatible with the 74 series 16244 16-bit driver. Four enable signals (nBE) turn the switches on similar to the enable signals of the 16244. The bus switch creates no additional propagation delay or ground bounce noise. The PI5C162244 device has a built-in 25-ohm series resistor to reduce noise because of reflections, thus eliminating the need for an external terminating resistor. Logic Block Diagram Product Pin Configuration 1BE 1BE 3BE 1B0 1A0 1B0 3A0 3B0 1A1 1B1 3A1 3B1 1A2 1B2 3A2 3B2 1A3 1B3 3A3 3B3 2BE 4BE 2A0 2B0 4A0 4B0 2A1 2B1 4A1 4B1 2A2 2B2 4A2 4B2 2A3 2B3 4A3 4B3 Truth Table(1) Function Disconnect Connect nBE H L nA0–7 Hi-Z nB0–7 1B1 GND 1B2 1B3 VCC 2B0 2B1 GND 2B2 2B3 3B0 3B1 GND 3B2 3B3 VCC 4B0 4B1 GND 4B2 4B3 4BE 1 48 2 47 3 46 4 45 5 44 6 43 7 42 8 41 9 40 10 39 48-PIN 11 A,V,B 38 12 37 13 36 14 35 15 34 16 33 17 32 18 31 19 30 20 29 21 28 22 27 23 26 24 25 2BE 1A0 1A1 GND 1A2 1A3 VCC 2A0 2A1 GND 2A2 2A3 3A0 3A1 GND 3A2 3A3 VCC 4A0 4A1 GND 4A2 4A3 3BE Product Pin Description Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance 122 Pin Name nBE I/O I nA0-nA7 nB0-nB7 I/O I/O Description Bus Output Enable (Active LOW) Bus A Bus B PS7024B 09/17/96 PI5C16244/162244 16-BIT BUS SWITCH BUFFER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .................................................................. –65°C to +150°C Ambient Temperature with Power Applied ................................. –40°C to +85°C Supply Voltage to Ground Potential (Inputs & Vcc Only) ........... –0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ....... –0.5V to +7.0V DC Input Voltage ......................................................................... –0.5V to +7.0V DC Output Current ................................................................................... 120 mA Power Dissipation ......................................................................................... 0.5W Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%) Test Conditions(1) Parameters Description Min. Typ.(2) Max. Units VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 — — V VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 — 0.8 V IIH Input HIGH Current VCC = Max., VIN = VCC — — ±1 µA IIL Input LOW Current VCC = Max., VIN = GND — — ±1 µA IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC — — ±1 µA VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA — –0.7 –1.2 V A (B) = 0V, B (A) = VCC 100 — — mA — 150 — mV 16244 — 5 7 Ω 162244 20 28 40 16244 — 10 15 162244 20 35 48 (3) IOS Short Circuit Current VH Input Hysteresis at Control Pins RON (4) Switch On Resistance VCC = Min., VIN = 0.0V, ION = 48 mA VCC = Min., VIN = 2.4V, ION = 15 mA Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) Description Test Conditions Typ. Max. Units CIN COFF Input Capacitance A/B Capacitance, Switch Off VIN = 0V VIN = 0V — — 6 6 pF pF CON A/B Capacitance, Switch On VIN = 0V — 8 pF 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. 5. This parameter is determined by device characterization but is not production tested. 123 PS7024B 09/17/96 PI5C16244/162244 16-BIT BUS SWITCH BUFFER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. Typ(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC — 0.1 3.0 µA ∆ICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) — — 2.5 mA ICCD Supply Current per Input per MHz(4) VCC = Max., A and B Pins Open nBE = GND Control Input Toggling 50% Duty Cycle — — 0.25 mA/ MHz 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. PI5C16244 Switching Characteristics over Operating Range PI5C16244 Com. Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ (1) Description (2,3) Propagation Delay xAx to xBx Bus Enable Time XBE to xAx or xBx Bus Disable Time XBE to xAx or xBx Conditions Min Max Unit CL = 50 pF RL = 500Ω — 0.25 ns 1.5 5.6 ns 1.5 5.2 ns PI5C162244 Switching Characteristics over Operating Range PI5C162244 Com. Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Conditions(1) Min Max Unit Propagation Delay(2,3) xAx to xBx Bus Enable Time XBE to xAx or xBx Bus Disable Time XBE to xAx or xBx CL = 50 pF RL = 500Ω — 1.25 ns 1.5 5.6 ns 1.5 5.2 ns Notes: 1. See test circuit and wave forms. 2. This parameter is guaranteed but not tested on Propagation Delays. 3. 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. Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 124 PS7024B 09/17/96