View IDTQS3V245Q_168033.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS 3.3V HIGH SPEED BUS SWITCH
IDTQS3V245
FEATURES:
* * * * * *
5 bi-directional switches connect inputs to outputs Pin compatibility with QS3245 250ps propagation delay Undershoot Clamp Diodes on all switch and control Inputs LVTTL-compatible control Inputs Available in SOIC and QSOP packages
DESCRIPTION:
APPLICATIONS:
* 3.3V to 2.5V voltage translation * 2.5V to 1.8V voltage translation * PCI bus isolation hot swap
The QS3V245 is an 8-bit high speed bus switch controlled by LVTTLcompatible active low enable signal. When closed, the switches exhibit near zero propagation delay without generating additional ground bounce or switching noise. The QS3V245 is specially designed for direct interface between 3.3V and 2.5V devices without any external components. When operating from a 3.3V supply, the logic high level at the switch output is clamped to 2.5V when the switch input signal exceeds 2.5V. This device can be used for switching 2.5V buses without signal attenuation. The ON resistance at 3.3V VCC is less than 5 typical, providing near zero propagation delay through the switch. Absence of DC path from switch I/O pins to VCC or ground makes QS3V245 an ideal device for hot swapping applications. The QS3V245 is characterized for operation from -40C to +85C.
FUNCTIONAL BLOCK DIAGRAM
2 A0
3 A1
4 A2
5 A3
6 A4
7 A5
8 A6
9 A7
OE
19
B0 18
B1 17
B2 16
B3 15
B4 14
B5 13
B6 12
B7 11
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 2000 Integrated Device Technology, Inc.
NOVEMBER 2000
DSC-5512/1
IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VS Description Supply Voltage to Ground DC Switch Voltage DC Input Voltage AC Input Voltage (pulse width 20ns) DC Output Current (max. sink current/pin) Maximum Power Dissipation TSTG Storage Temperature Max -0.5 to +4.6 -0.5 to +4.6 -0.5 to +4.6 -3 120 0.5 -65 to +150 Unit V V V V mA W C
NC A0 A1 A2 A3 A4 A5 A6 A7 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
VIN VAC IOUT
NOTES: 1. Stresses greater than those listed under ABSOLUTE 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. 2. VCC terminals.
CAPACITANCE (TA = +25C, f = 1MHz, VIN = 0V, VOUT = 0V)
Symbol CIN CI/O Parameter(1) Control Inputs Quickswitch Channels (Switch OFF) Typ. 4 5 Max. 6 7 Unit pF pF
SOIC/ QSOP TOP VIEW
NOTE: 1. As applicable to the device type.
PIN DESCRIPTION
Pin Names OE Ax Bx Output Enable Data I/Os Data I/Os Description
FUNCTION TABLE(1)
OE H L
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
Outputs Disconnected Ax = Bx
2
IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 3.3V 0.3V
Symbol VIH VIL IIN IOZ RON Parameter Input HIGH Voltage Input LOW Voltage Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Switch ON Resistance Test Conditions Guaranteed Logic HIGH for Control Inputs Guaranteed Logic LOW for Control Inputs 0V VIN VCC 0V VOUT VCC, Switches OFF VCC = Min., VIN = 0V, ION = 8mA VCC = Min., VIN = 1.7V, ION = 8mA VCC = 2.3V, VIN = 0V, ION = 8mA VCC = 2.3V, VIN = 1.3V, ION = 8mA VP Pass Voltage(2) VIN = VCC = 3.3V, IOUT = -5A VIN = VCC = 2.5V, IOUT = -5A
NOTES: 1. Typical values are at VCC = 3.3V and TA = 25C. 2. Pass voltage is guaranteed, but not production tested.
Min. 2 -- -- -- -- -- -- -- 2.3 --
Typ.(1) Max. -- -- -- 0.001 5 15 7 25 2.7 1.8 -- 0.8 1 1 7 20 -- -- 2.9 --
Unit V V A A
V
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16 14 12 10
RON
(ohms)
8 6 4 2 0 0 0.5 1 1.5 2 2.5
VIN
(Volts)
3
IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
TA = -40C to +85C, VCC = 3.3V 0.3V
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current (2) per Input HIGH Dynamic Power Supply Current per MHz (3) Test Conditions(1) VCC = Max., VIN = GND or VCC, f = 0 VCC = Max., VIN = 3V or VCC, f = 0 per Control Input VCC = 3.3V, A and B Pins Open, Control Input Toggling @ 50% Duty Cycle
NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TTL driven input (VIN = 3V, control inputs only). A and B pins do not contribute to Icc. 3. This current applies to the control inputs only and represents 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 guaranteed but not production tested.
Min. -- -- --
Max. 3 30 0.15
Unit A A mA/MHz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(1)
TA = -40C to +85C
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay(2,3) Ax to/from Bx Switch Turn-On Delay OE to Ax/Bx Switch Turn-Off Delay(2) OE to Ax/Bx 0.5 4 ns 0.5 6.5 ns Min. Typ. Max. 0.25 Unit ns
NOTES: 1. See TEST CIRCUITS AND WAVEFORMS. Minimums guaranteed but not production tested 2. This parameter is guaranteed but not production tested. 3. The bus switch contributes no propagation 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 CL = 30pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. Propagation 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.
4
IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
OUTPUT VI CHARACTERISTICS
VOUT (Volts) 1 250 200
IOs - (mA)
2
3
4
-50 -100
IOs - (mA)
150 100 50 0 0 0.5 1 VOUT (Volts) 1.5 2
-150 -200 -250 -300
Outputs Low Characteristic
Outputs High Characteristic
PASS VOLTAGE vs VCC
3 2.5
VOUT = 2.5V @ VCC = 3.3V VOUT = 1.8V @ VCC = 2.5V
VOUT - (Volts)
2
1.5 2.2 2.4 2.7 3 VCC (V) 3.3 3.6
5
IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
3.3V TO 2.5V VOLTAGE TRANSLATION
3.3V
VOUT
3.3V Supply
2.5V Output of Switch
3.3V
2.5V
QS3V245
2.5V
2.5V
VIN 0V Input of Switch 3.3V
2.5V TO 1.8V VOLTAGE TRANSLATION
2.5V VOUT 2.5V Supply
2.5V
1.8V Output of Switch
1.8V
QS3V245
1.8V
1.8V
VIN 0V Input of Switch 2.5V
6
IDTQS3V245 3.3V HIGH SPEED BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX Device Type
XX Package
SO Q
Small Outline IC (Gull Wing) Quarter Size Small Outline Package
3V245
3.3V High Speed Bus Switch
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
for Tech Support: logichelp@idt.com (408) 654-6459
7

▲Up To Search▲

Price & Availability of IDTQS3V245Q

	To Download IDTQS3V245Q Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .