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Part: PI5C162861
Category:
Logic
-> Bus Interface
-> Bus Oriented Circuits
Description: 20-Bit Flow-through Bus Switch (2 Enables) W/25 Ohm Resistor
Company: Pericom Semiconductor Corporation
Datasheet: Download PI5C162861 datasheet File size : 505 kB
Request For quote: Find where to buy PI5C162861
Datasheet text preview:
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16861/162861 20-Bit, 2-Port Bus Switch
PI5C16861 PI5C162861 (25)
20-Bit, 2-Port Bus Switch
Product Features
· · · · Near-zero propagation delay 5 or 25 switches connect inputs to outputs Direct bus connection when switches are ON 32X384 function with flow through pinout make board layout easier · Ultra-low quiescent power (0.2 µA typical) ideally suited for notebook applications · Industrial operating temperature: 40°C to +85°C · Packages available: 48-pin 240-mil wide 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 BusSwitch circuits are produced using the Company's advanced submicron CMOS technology, achieving industry leading speed. The PI5C16861 is configured as a 20-bit, 2-port bus switch designed with a low ON resistance (5) allowing inputs to be connected d i r e c t l y to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BEx) input signal. The PI5C162861 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor.
Logic Block Diagram
A0 B0
Product Pin Configuration
NC A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND NC A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 48-Pin 39 A,V,B 38 37 36 35 34 33 32 31 30 29 28 27 26 25 VCC BE1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 VCC BE2 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19
A9
B9
BE1
A10
B10
A19
B19
BE2
Truth Table(1)
Function Disconnect Connect BEX A19-A0 H Hi-Z L B 19-B0
Product Pin Description
Pin Name BEx A19-A0 B19-B0
1
Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
Description Bus Enable Inputs (Active LOW) Bus A Bus B
PS7026C 09/18/96
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16861/162861 20-Bit, 2-Port Bus Switch
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 ....... 120mA 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%)
Parameters Description VIH VIL I IH IIL IOZH VIK ION VH RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current
(3)
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., IIN = 18mA A (B) = 0V, B (A) = VCC VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA 16861 162861 16861 162861
Min. 2.0 0.5 -- -- -- -- 100 -- -- 20 -- 20
Typ(2) -- -- -- -- -- 0.7 -- 150 5 28 10 35
Max. -- 0.8 ±1 ±1 ±1 1.2 -- -- 7 40 15 48
Units V V µA µA µA V mA mV
Input Hysteresis at Control Pins Switch On Resistance
(4)
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On Test Conditions VIN = 0V VIN = 0V VIN = 0V Typ 6 6 8 Units pF pF 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.
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PS7026C 09/18/96
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16861/162861 20-Bit, 2-Port Bus Switch
Power Supply Characteristics
Parameters Description I CC I C C ICCD Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open BEX = GND Control Input Toggling 50% Duty Cycle VIN = GND or VCC VIN = 3.4V(3) Min. Typ(2) 0.1 Max. 10 2.5 0.25 Units µA mA 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.
PI5C16861 Switching Characteristics over Operating Range
PI5C16861 Com.
Parameters tP L H tP H L tP Z H tP Z L tP H Z tP L Z
Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BEX to Ax or Bx Bus Disable Time BEx to Ax or Bx
C o n d i t i o n s( 1 ) CL = 50pF RL = 500
Min
Max
Unit
0.25 1.5 1.5 6.5 5.5
ns ns ns
PI5C162861 Switching Characteristics over Operating Range
PI5C162861 Com.
Parameters tP L H tP H L tP Z H tP Z L tP H Z tP L Z
Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BEX to Ax or Bx Bus Disable Time BEx to Ax or Bx
C o n d i t i o n s( 1 ) CL = 50pF RL = 500
Min
Max
Unit
1.25 1.5 1.5 6.5 5.5
ns ns ns
Notes: 1. See test circuit and waveforms. 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 0.25ns for 50pF 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
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PS7026C 09/18/96
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