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參數(shù)資料
| 型號(hào)： | IDT74FST6800QG8 |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁(yè)數(shù)： | 3/5頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC BUS SWITCH 10BIT 24-QSOP |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 系列： | 74FST |
| 類型： | 總線開(kāi)關(guān) |
| 獨(dú)立電路： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-QSOP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 74FST6800QG8 |
3
INDUSTRIALTEMPERATURERANGE
IDT74FST6800
10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ΔICC
Quiescent Power Supply Current
VCC = Max.
—
0.5
1.5
mA
TTL Inputs HIGH
VIN = 3.4V(3)
ICCD
Dynamic Power Supply
VCC = Max., Outputs Open
VIN = VCC
—
30
40
A/
Current(4)
Enable Pin Toggling
VIN = GND
MHz/
50% Duty Cycle
Enable
IC
Total Power Supply Current(6)
VCC = Max., Outputs Open
VIN = VCC
—3
4
mA
Enable Pin Toggling
VIN = GND
(Ten Switches Toggling)
fi = 10MHz
VIN = 3.4V
—
3.3
4.8
50% Duty Cycle
VIN = GND
POWER SUPPLY CHARACTERISTICS
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of Icc formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC +
ΔICC DHNT + ICCD (fiN)
ICC = Quiescent Current
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (zero for non-register devices)
fi = Input Frequency
N = Number of SwitchesToggling at fi
All currents are in milliamps and all frequencies are in megahertz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%
Symbol
Description
Condition(1)
Min.(2)
Typ.
Max.
Unit
tPLH
Data Propagation Delay
CL = 50pF
—
0.25
ns
tPHL
Ax, Bx to Bx, Ax(3,4)
RL = 500
Ω
tPZH
Switch Turn On Delay
1.5
—
6.5
ns
tPZL
ON to Ax, Bx
tPHZ
Switch Turn Off Delay
1.5
—
5.5
ns
tPLZ
ON to Ax, Bx(3)
NOTES:
1. See test circuit and waveforms.
2. Minimum limits guaranteed but not tested.
3. This parameter is guaranteed by design but not tested.
4. 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 0.25 ns for 50 pF load. Since this time is constant and much smaller than the rise/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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