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IDTQS34X383 HIGH-SPEED 32-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED 32-BIT BUS EXCHANGE SWITCH IN MILLIPAQTM
FEATURES:
* * * * * * * *
IDTQS34X383
5 switches connect inputs to outputs Zero propagation delay Direct bus connect Live insertion capability Low power CMOS proprietary technology Bus exchange allows nibble swap TTL-compatible control inputs Available in 80-pin Millipaq package
The QS34X383 provides four sets of eight high-speed CMOS TTLcompatible bus switches. The low ON resistance (5) of the QS34X383 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Bus Enable (BEx) signals turn the switches on. The Bus Exchange (BXx) signals provide nibble swap of the AB and CD pairs of signals. This exchange configuration allows byte swapping of buses in systems. It can also be used as a 16-bit 2-to-1 multiplexer and to create low delay barrel shifters, etc. The QS34X383 is characterized for operation at -40C to +85C.
DESCRIPTION:
FUNCTIONAL BLOCK DIAGRAM
A0 C0 A4 C4
B0
D0
B4
D4
A3
C3
A7
C7
B3
D3
B7
D7
BX1 BE1 BX2 BE2
A8
C8
A12
C12
B8
D8
B12
D12
A11
C11
A15
C15
B11
D11
B15
D15
BX3 BE3 BX4 BE4
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
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c 1999 Integrated Device Technology, Inc.
NOVEMBER 1999
DSC-5573/1
IDTQS34X383 HIGH-SPEED 32-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
BE1 C0 A0 B0 D0 C1 A1 B1 D1 G ND BE2 C4 A4 B4 D4 C5 A5 B5 D5 G ND BE3 C8 A8 B8 D8 C9 A9 B9 D9 G ND BE4 C12 A12 B12 D12 C13 A13 B13 D13 G ND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 V CC D3 B3 A3 C3 D2 B2 A2 C2 BX1 V CC D7 B7 A7 C7 D6 B6 A6 C6 BX2 V CC D11 B11 A11 C11 D10 B10 A10 C10 BX3 V CC D15 B15 A15 C15 D14 B14 A14 C14 BX4
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) VTERM(3) VAC IOUT PMAX TSTG 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 1.4 -65 to +150 Unit V V V V mA W C
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.
CAPACITANCE
Pins
(TA = +25C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
Max.(1) 8 8 Unit pF pF Control Pins Quickswitch Channels (Switch OFF)
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names Ax, Bx Cx, Dx BEx BXx I/O I/O I/O I I Buses A, B Buses C, D Bus Switch Enable Bus Exchange Description
FUNCTION TABLE(1)
BEx H L L BXx X L H Ax Z Cx Dx Bx Z Dx Cx Function Disconnect Connect Exchange
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance
MILLIPAQ TOP VIEW 2
IDTQS34X383 HIGH-SPEED 32-BIT BUS EXCHANGE 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 Parameter Input HIGH Level Input LOW Level Input LeakageCurrent (Control Inputs) Off-State Output Current (Hi-Z) Switch ON Resistance(2,3) Test Conditions Guaranteed Logic HIGH for Control Pins Guaranteed Logic LOW for Control Pins 0V VIN VCC, Control Inputs 0V VOUT VCC, Switches OFF VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION =15mA Min. 2 -- -- -- -- -- Typ.(1) -- -- -- -- 6 12 Max. -- 0.8 5 5 8 17 Unit V V A A
NOTES: 1. Typical values are at VCC = 5.0V, TA = 25C. 2. Max value of RON is guaranteed but not production tested. 3. Measures by voltage drop between the AB and CD pin at the indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (A or B, C or D) pins.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16
RON
(ohms)
14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
VIN
(Volts)
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IDTQS34X383 HIGH-SPEED 32-BIT BUS EXCHANGE 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., BEx = GND or Vcc, f = 0 VCC = Max., BEx = 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-D 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. 6 2.5 0.25
Unit mA 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 tBX QCI Data Propagation Delay (2,3) AxBx to CxDx, CxDx to AxBx Switch Turn-on Delay BEx to Ax, Bx, Cx, Dx Switch Turn-off Delay (2) BEx to Ax, Bx, Cx, Dx Switch Multiplex Delay (2) BX to Ax, Bx, Cx, Dx Charge Injection(4,5) -- 1.5 --
pC 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 0.25ns 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. Measured at switch turn off, A to C, load = 50pF in parallel with 10 meg scope probe, VIN at I = 0V. 5. Measured at switch turn off through bus multiplexer, A to C A to D, B connected to C, load = 50pF in parallel with 10 meg scope probe, VIN at A = 0V. Charge injection is reduced because the injection from the turn off of the A to C switch is compensated by the turn on of the B to C switch.
Parameter
Min. (1) -- 1.5 1.5 1.5
Typ. -- -- -- --
Max. 0.25 6.5 5.5 6.5
Unit
ns ns ns ns
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IDTQS34X383 HIGH-SPEED 32-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C )
Q3
150 mil M illipaQ
34X383
High Speed 32-Bit Bus Exchange Sw itch in MillipaQ
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
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for Tech Support: logichelp@idt.com (408) 654-6459
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