View IDTQS32245_242353.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

IDTQS32245 HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
.EATURES:
* * * * * * * * * Enhanced N channel FET with no inherent diode to Vcc 5 bidirectional switches connect inputs to outputs Pin compatible with the 74F245, 74FCT245, and 74FCT245T Low power CMOS proprietary technology Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control inputs 25 resistors for low noise TTL-compatible control inputs Available in SOIC, QSOP, and TSSOP packages
IDTQS32245
DESCRIPTION:
The QS32245 provides a set of eight high-speed CMOS TTL-compatible bus switches in a pinout compatible with 74FCT245, 74F245, 74ALS/AS/ LS245 8-bit transceivers. The Output Enable (OE) signal turns the switches on similar to the OE signal of the 74'245. The QS32245 has 25 series resistors to reduce ground bounce noise. QuickSwitch devices provide an order of magnitude faster speed than conventional logic devices. The QS32245 is characterized for operation at -40C to +85C.
APPLICATIONS:
* * * * * * * Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Power conservation Capacitance reduction and isolation Logic replacement (data processing) Clock gating Bus switching and isolation
.UNCTIONAL BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
OE
B0
B1
B2
B3
B4
B5
B6
B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 2002 Integrated Device Technology, Inc.
MARCH 2002
DSC-5748/1
IDTQS32245 HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CON.IGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) Description Supply Voltage to Ground DC Switch Voltage Vs DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current Maximum Power Dissipation (TA = 85C) Storage Temperature Max -0.5 to +7 -0.5 to +7 -0.5 to +7 -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
VTERM(3) VAC IOUT PMAX TSTG
NOTE: 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. 3. All terminals except Vcc.
SOIC/ QSOP/ TSSOP TOP VIEW
CAPACITANCE
(TA = +25C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
Pins Control Pins Quickswitch Channels (Switch OFF) Typ. 3 5 Max.(1) 5 7 Unit pF pF
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names OE An Bn Output Enable Data I/Os Data I/Os Description
.UNCTION TABLE
OE H L
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
Outputs Disconnected An = Bn
2
IDTQS32245 HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 5%
Symbol VIH VIL IIN IOZ RON(3) VP Parameter Input HIGH Level Input LOW Level Off-State Output Current (Hi-Z) Switch ON Resistance Pass Voltage(2) Test Conditions Guaranteed Logic HIGH for Control Pins Guaranteed Logic LOW for Control Pins 0V VOUT VCC, Switches OFF VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION =15mA VIN = VCC = 5V, IOUT = -5A Min. 2 -- -- -- 18 18 3.7 Typ.(1) -- -- -- 0.001 23 25 4 Max. -- 0.8 1 1 35 40 4.2 Unit V V A A V
Input LeakageCurrent (Control Inputs)(2) 0V VIN VCC
NOTES: 1. Typical values are at VCC = 5.0V, TA = 25C. 2. Pass Voltage is guaranteed but not production tested. 3. ROUT changed on March 8, 2002. See rear page for more information.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
RON
(ohms)
70 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
VIN
(Volts)
3
IDTQS32245 HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current per Control Input HIGH (2) Dynamic Power Supply Current per MHz(3) Test Conditions(1) VCC = Max., VIN = GND or Vcc, f = 0 VCC = Max., VIN = 3.4V, f = 0 VCC = Max., A and B pins open Control Inputs Toggling at 50% Duty Cycle
NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TLL driven input (VIN = 3.4V, 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.
Max. 3 1.5 0.25
Unit A mA mA/MHz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40C to +85C, VCC = 5.0V 5%; CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Data Propagation Delay (2,3) An to/from Bn Switch Turn-on Delay OE to An/Bn Switch Turn-off Delay (2) OE to An/Bn 0.5 -- 4.5
ns
Parameter
Min. (1) -- 0.5
Typ. -- --
Max. 1.25 6.6
Unit
ns
ns
NOTES: 1. Minimums are 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 1.25ns for CL = 50pF. 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
IDTQS32245 HIGH-SPEED CMOS QUICKSWITCH 8-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING IN.ORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C)
SO Q PA
Small Outline IC Quarter Size Outline Package Thin Shrink Small Outline Package
32245
High Speed CMOS Quickswitch 8-Bit Bus Switch
As per PCN L0201-02, the Output Resistance (RON) specifications have changed as of March 8, 2002. The original specifications were:
Parameter RON Description VCC = Min, VIN = 0V, ION = 30mA VCC = Min, VIN = 2.4V, ION = 15mA Min. 20 20 Typ. 28 35 Max. 40 48 Unit
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
5

▲Up To Search▲

Price & Availability of IDTQS32245

	To Download IDTQS32245 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .