参数资料
型号: QS34X245Q3G8
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 总线收发器
英文描述: CBT/FST/QS/5C/B SERIES, QUAD 8-BIT DRIVER, TRUE OUTPUT, PDSO80
封装: MILLIPAK-80
文件页数: 4/5页
文件大小: 49K
代理商: QS34X245Q3G8
4
INDUSTRIALTEMPERATURERANGE
IDTQS34X245
HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
TestConditions(1)
Max.
Unit
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or Vcc, f = 0
12
A
ICC
Power Supply Current per Control Input HIGH (2)
VCC = Max., VIN = 3.4V, f = 0
1.5
mA
ICCD
Dynamic Power Supply Current per MHz(3)
VCC = Max., A and B pins open
0.25
mA/MHz
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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 5%;
CLOAD = 50pF, RLOAD = 500
unless otherwise noted.
Symbol
Parameter
Min.(1)
Typ.
Max.
Unit
tPLH
DataPropagationDelay(1,2)
0.25
ns
tPHL
An to/from Bn
tPZL
SwitchTurn-onDelay
0.5
5.6
ns
tPZH
OE to An/Bn
tPLZ
SwitchTurn-offDelay(1)
0.5
5.2
ns
tPHZ
OE to An/Bn
NOTES:
1.
Minimums are guaranteed but not production tested.
2. 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.
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