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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection
Product Description
Pericom Semiconductors PI5C series of logic circuits are produced using the companys advanced submicron CMOS technology.
Product Features
Undershoot protection up to 1.5V, 25ns width Near zero propagation delay 5 Ohm switches connect between two ports Fast switching speed: 4.5ns max. Permits hot insertion Isolation during power-off conditions B-Port outputs are precharged by bias voltage to minimize signal distortion during live insertion. Package options include: - 48-pin 150-mil wide plastic BQSOP (B) - 48-pin 240-mil wide plastic TSSOP (A)
The PI5C16215C provides 20-bits of high-speed bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device also precharges the B-port to a user-selectable bias voltage (BIASV) to minimize liveinsertion noise. The device incorporates an internal charge pump to handle input undershoot of up to 1.5V and 25ns width. The device is organized as dual 10-bit bus switches with individual output-enable (OE) inputs. When OE is low, the corresponding 10-bit bus switch is on and port A is connected to port B. When OE is high, the switch is open, a high-impedance state exists between the two ports, and port B is precharged to BIASV through the equivalent of a 10-k ohm resistor. To ensure the high-impedance state on power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver connected to OE.
Logic Block Diagram
1 2 46
BIASV 1B1
1A1
SW
Product Pin Configuration
1A10 12 SW
36
1B10
BIASV 1A1 1A2
1A3
1 2 3 4 5 6 7 8 9 10
48 47 46 45 44 43 42 41 40 39 38
1OE
2OE
1B1 1B2 1B3 1B4
1OE
48
1A4 1A 5 1A 6
1B5
2A1
13
SW
35
2B1
GND 1A7
1A8
GND
1B6 1B7 1B 8 1 B9 1 B10
1A 9
2A10
24
SW
25
2B10
1A10 2A1 2A 2
2OE
47
VCC
2A 3
GND 2A 4 2A 5
2A 6
A
B
11 12 48-Pin 37 A,B 36 13 14 35 15 34 16 33 17 32 18 31 19 30 20 29 21 22 23 24 28 27 26 25
2B1 2B2 2B 3
GND 2B4
2B5
2B6
2A 7 2A 8 2A 9
2B7 2B8
2B9
OE
2A 10
2B10
1
PS8369B
12/15/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C 20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection
Absolute Maximum Ratings Over Free-Air Temperature Range
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ..................................... 65C to +150C Supply Voltage Range ........................................ 0.5V to +7V DC Input Voltage(1) ...................................................... 0.5V to +7V Input Clamp Current, IIK (VI <0) ................................. 50mA DC Output Current ....................................................... 120mA Power Dissipation(2)
.................................................................... 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.
Notes: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperatue of 150C and a board trace length of 750 mils.
Recommended Operating Conditions (Over Recommended Operating Free-air Temperature Range)
Parame te r VCC BIASV VIH VIL TA
Parame te r VIK II IO ICC ICCE Control pins CI Control pins CO (OFF) rON* VCC = 4.5V VCC = 4.5V VCC = 5.5V VCC = 4.5V VCC = 5.5V VCC = 5.5V VI =3V or 0 VO =3V or 0 VCC = 4V Switch Off VI = 2.4V VI = 0, VI = 0, VI = 2.4V II = 15mA II = 64mA II = 30mA II = 15mA
De s cription Supply voltage Supply voltage High- Level input voltage Low- level input voltage Operating free- air temperature
M in. 4 1.3 2
M ax. 5.5 VCC 0.8
Units
V
40
85
Typ=
C
Electrical Characteristics (Over Recommended Operating Free-air Temperature Range)
Te s t Conditions II = 18mA VI = 5.5V or GND BIASV = 2.4V IO = 0 VO = 0 VI = VCC or GND 0.25 100 2.5 3.5 4.5 9 5.5 5 9 20 8 8 15 ohm M in. M ax. 1.8 5 Units V A mA A mA pF
One input at 3.4V, Other at VCC or GND
Notes: * Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages of the two (A or B) terminals. E This is the increase in supply current for each input that is at the specified TTL voltage level rather the VCC or GND. = All typical values are at VCC = 5V, TA = 25C. 2
PS8369B 12/15/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C 20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection
Truth Table
OE L H Function A port = B port A port = Z, B Port = BIASV
Switching Characteristics (Over Recommended Operating Free-air Temperature Range, CL = 50pF)
Parame te r tPD tPZH tPZL tPHZ tPLZ BIASV = GND BIASV = 3V BIASV = GND BIASV = 3V Te s t Conditions From (Input) A or B ON To (Output) B or A A or B 3.1 3.0 2.0 3 VCC = 5V 0.5V M in. M ax. 0.25 5 5 5 5 VCC = 4V M in. M ax. 0.25 6 6 5.5 5.5 ns Units
ON
A or B
Notes: 1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state resistance of the switch and a load capacitance of 50pF, when driven by an ideal voltage source (zero output impedance).
Parameter Measurements
7V From Output Under Test CL = 50pF (See note 1) 500ohm S1 Open GND
Te s t tpd tPLZ/tPZL
S1 O pen 7V O pen
3V
500ohm
tPHZ/tPZH
Output Control (Low Level Enabling)
LOAD CIRCUIT 3V Input tPLH 1.5V 1.5V 1.5V 0V tPHL VOH Output 1.5V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES
1.5V tPZL 1.5V tPLZ
1.5V 0V 3.5V VOL +0.3V VOL VOH
Output Waveform 1 S1 at 6V (see Note 2) Output Waveform 2 S1 at Open (see Note 2)
tPZH 1.5V
tPHZ VOH -0.3V 0V
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, ZO = 50, tr 2.5ns, tf 2.5ns. 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.
PS8369B 12/15/01
3
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C 20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection
48-pin BQSOP (B)
48
.150 .157 3.80 4.00
.228 .244 5.80 6.20
Gauge Plane .010 0.25 BSC .386 .394 9.80 10.00 .020 .029 0.50 0.75
1
.015 0.381 x 45 .008 0.20 Nom Nom .063 1.60 .079 2.0 Max .002 0.05 .009 0.25
.014 0.356 REF
5 .0157 BSC 0.40 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .0051 .009 0.13 0.23
48-pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE
.004 0.09 .008 0.20 0.45 .018 0.75 .030 .319 BSC 8.1
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010 0.17 0.27
.002 .006 0.05 0.15
4
PS8369B
12/15/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C 20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection
48-pin SSOP (V)
48
.291 .299 7.39 7.59
.395 .420 10.03 10.67
Gauge Plane .010 0.25 1 .620 .630 15.75 16.00 .02 0.51 .04 1.01
.008 0.20 Nom.
.015 0.381 x 45 .025 0.635
.110 2.79 Max .025 BSC 0.635 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .008 0.20 .0135 0.34
0-8
.008 0.20 .016 0.40
Ordering Information
Part PI5C16215CB PI5C16215CA Pin - Package 48 - BQSOP (B48) 48 - TSSOP (A48) Width 150- mil 240- mil
Applications Information
Logic Inputs
The logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a +5.0V supply, IN may be driven low to 0V and high to 5.5V. Driving IN Rail-to-Rail(R) minimizes power consumption. Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying signals to the bias voltage pin and the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
Power-Supply Sequencing
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
5
PS8369B 12/15/01

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