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Part: PI2BV3867
Category:
Logic
-> Bus Interface
Description: 2.5V, 10-bit, 2-Port, 266 MHZ DDR Bus Switch
Company: Pericom Semiconductor Corporation
Datasheet: Download PI2BV3867 datasheet File size : 162 kB
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Datasheet text preview:
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 1 2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI2BV3867
2.5V, 10-Bit, 2-Port 266 MHz DDR Bus Switch
Product Features
Used in x8 DDR Memory Module Near zero propagation delay 20-ohm switches connect inputs to outputs Fast Switching Speed 3ns (max.) Low Off Capacitance (3pF) Pull-down on B output Packages available: 24-pin 150 mil wide plastic QSOP (Q) 24-pin 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductors PI2BV series of logic circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. The PI2BV3867 is a 10-bit, 2.5 volt two-port bus switch designed with a low ON resistance allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BE) input signal. The PI2BV3867 switch is intended for 266 MHz DDR (x8) Memory Module Applications.
Logic Block Diagram
A0 B0
Product Pin Configuration
NC A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BE
A9
B9
24-Pin L, Q
BE
Product Pin Description
Pin Name BE A09 B09 GND VCC De s cription Bus Enable Input (Active LOW) Bus A Bus B Ground Power
Truth Table(1)
Function Disconnect Connect BE H L A0A9 Hi- Z B09
Notes: H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
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PS8471D
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI2BV3867 2.5V, 10-Bit, 2-Port 266 MHz DDR 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 ...... 0.5V to +4.6V DC Input Voltage ........... 0.5V to +4.6V 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 = 0°C to +85°C, VCC = 2.3V to 2.7V)
Parame te rs VIH VIL II VIK RON RPD De s cription Input HIGH Voltage (BE) Input LOW Voltage (BE) Input Current Clamp Diode Voltage Switch ON Resistance(4) Pull- Down Resistance(5) Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC or GND VCC = Min., IIN = 18mA VCC = Min., VIN = 0.9V, ION = 20mA VCC = Min., VIN = 1.6V, ION = 15mA VBIAS(B- Ports) = 2.5V, IOZH 250µA 10 17 22 M in. 1.6 0.3 Typ(2) M ax. VCC+0.3 0.9 ±10 1.2 33 30 Units V µA V k
Capacitance (TA = 25°C, f = 1 MHz)
Parame te rs (4) CIN COFF(A) CON(A/B) De s cription Input Capacitance A Capacitance, Switch OFF A/B Capacitance, Switch ON VIN = 0V Te s t Conditions Typ. 3 3 7 pF Units
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 = 2.5V, TA = 25°C ambient and maximum loading. 3. 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. 4. This parameter is determined by device characterization but is not production tested. 5. Pull-down resistance is measured with the switch OFF and calculated by VBIAS(B-Ports)/IOZH.
Power Supply Characteristics
Parame te rs ICC D e s cription Q uiescent Power Supply Current Te s t Conditions (1) VCC = Max., VIN = VCC or GND M in. Typ(2) M ax. 10 Units µA
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 2.5V, +25°C ambient. 3. Per LVTTL driven input (control input only); A and B pins do not contribute to ICC.
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PS8471D
10/10/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI2BV3867 2.5V, 10-Bit, 2-Port 266 MHz DDR Bus Switch
Switching Characteristics over Operating Range
PI2BV3867 Com. Parame te rs tPLH tPHL tPZH tPZL tPHZ tPLZ De s cription Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx CL = 30pF, RL = 500 ohms 1 1 1 1 Conditions (2,3) M in. M ax. 1 3 3.5 3 3.8 ns Units
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 load capacitance. The time constant for the switch alone is of the order of 1ns 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 switch's driving side and its interaction with the load on the driven side.
Parameter Measurements
From Output Under Test CL = 30pF (See note 1) 500 S1 2xVCC Open GND
Te s t tPD tPLZ/tPZL tPHZ/tPZH
Output Control (Low Level Enabling) Output Waveform 1 S1 at 2xVCC (see Note 2) Output Waveform 2 S1 at GND (see Note 2)
S1 Open 2xVCC GND
VCC
500
LOAD CIRCUIT
VCC/2 tPZL VCC/2
VCC/2 0V tPLZ VOH VOL +0.15V VOL VOH
VCC Input tPLH VCC/2 VCC/2 0V tPHL VOH Output VCC/2 VCC/2 VOL
tPZH VCC/2
tPHZ VOH -0.15V 0V
VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES
Notes: 1. CL includes probe and jig capacitance. 2. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. 3. All input pulses are supplied by generators having the following characteristics: PRR<10MHz, Z O = 50 ohms, tR 2ns, tF 2ns. 4. The outputs are measured one at a time with one transition per measurement. 5. tPLZ and tPHZ are the same as tDIS. 6. tPZL and tPZH are the same as tEN. 7. tPLH and tPHL are the same as tPD.
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