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參數資料
| 型號： | IDT74FST32244P |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 總線收發器 |
| 英文描述： | CBT/FST/QS/5C/B SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數： | 3/5頁 |
| 文件大小： | 66K |
| 代理商： | IDT74FST32244P |
IDT74FST3244, IDT74FST32244
OCTAL BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
3
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Following Condition Apply Unless Otherwise Specified:
Operating Conditions: TA = –40°C to +85°C, VCC = 5.0V ±5%
POWER SUPPLY CHARACTERISTICS
3255 tbl 07
3255 tbl 08
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
—0.5
1.5
mA
ICCD
Dynamic Power Supply
Current(4,5)
VCC = Max.
Outputs Open
VIN = VCC
VIN = GND
—
120
160
A/
MHz/
1 Enable Pin Toggling
50% Duty Cycle
Enable
IC
Total Power Supply Current(6)
VCC = Max.
Outputs Open
2 Enable Pins Toggling
VIN = VCC
VIN = GND
—2.4
3.2
mA
fi = 10MHz
50% Duty Cycle
VIN = 3.4
VIN = GND
—2.9
4.7
32244
Symbol
Description(1)
Min.
Typ.
Max.
Unit
tPLH
tPHL
Data Propagation Delay
A to B, B to A(2)
—
0.25
1.25
ns
tPZH
tPZL
Switch CONNECT Delay
X
OE to A or B
1.5
—
6.5
5.6
ns
tPHZ
tPLZ
Switch DISCONNECT Delay
X
OE to A or B
1.5
—
5.5
5.2
ns
|QCI|
Charge Injection During Switch
DISCONNECT, XOE to A or B(3)
—1.5
—
pC
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 = 3.3V, +25C 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. CPD = lCCD/VCC
CPD = Power Dissipation Capacitance
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC +
ICC DHNT + ICCD (fiN)
ICC = Quiescent Current
ICC = 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)
fi = Control Input Frequency
N = Number of Control Inputs Toggling at fi
NOTES:
1. See test circuits and waveforms.
2. The bus switch contributes no Propagation Delay other than the RC Delay of the
load interacting with the RC of the switch.
5. lQCIl is the charge injection for a single switch DISCONNECT and applies to either single switches or multiplexers.
lQDCIl is the charge injection for a multiplexer as the multiplexed port switches from one path to another. Charge injection is
reduced because the injection from the DISCONNECT of the first path is compensated by the CONNECT of the second path.
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