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參數(shù)資料
| 型號(hào)： | 74FST3245QSR |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-Bit Bus Switch |
| 中文描述： | CBT/FST/QS/5C/B SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | QSOP-20 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 85K |
| 代理商： | 74FST3245QSR |
Semiconductor Components Industries, LLC, 2001
August, 2001 – Rev. 0
1
Publication Order Number:
74FST3245/D
74FST3245
8-Bit Bus Switch
The ON Semiconductor 74FST3245 is an 8–bit, high performance
switch. The device is CMOS TTL compatible when operating between
4 and 5.5 Volts. The device exhibits extremely low R
ON
and adds
nearly zero propagation delay. The device adds no noise or ground
bounce to the system.
The device consists of an 8–bit switch. Port A is connected to Port B
when OE is low. If OE is high, the switch is high Z.
R
ON
4 Typical
Less Than 0.25 ns–Max Delay Through Switch
Nearly Zero Standby Current
No Circuit Bounce
Control Inputs are TTL/CMOS Compatible
Pin–For–Pin Compatible with QS3245, FST3245, CBT3245
All Popular Packages: QSOP–20, TSSOP–20, SOIC–20
NC
A
0
A
2
A
3
A
5
A
6
A
7
A
4
A
1
V
CC
OE
B
1
B
2
B
4
B
5
B
6
B
7
B
3
B
0
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Figure 1. 20–Lead Pinout
GND
L
H
Input OE
Function
Connect
Disconnect
TRUTH TABLE
2
19
9
18
11
OE
Figure 2. Logic Diagram
A
0
A
7
B
0
B
7
Description
Bus Switch Enables
PIN NAMES
OE
1
, OE
2
1A, 2A
http://onsemi.com
Device
74FST3245DW
74FST3245DWR2
74FST3245DT
Package
SO–20
SO–20
TSSOP–20
Shipping
38 Units/Rail
1000 Units/Reel
75 Units/Rail
ORDERING INFORMATION
74FST3245DTR2
74FST3245QS
74FST3245QSR
TSSOP–20
QSOP–20
QSOP–20
2500 Units/Reel
55 Units/Rail
2500 Units/Reel
TSSOP–20
DT SUFFIX
CASE 948E
SO–20
DW SUFFIX
CASE 751D
20
MARKING
DIAGRAMS
Pin
Bus A
1B, 2B
Bus B
20
1
1
FST3245
AWLYYWW
1
20
20
1
FST
3245
ALYW
A
L, WL
Y
W, WW = Work Week
= Assembly Location
= Wafer Lot
= Year
QSOP–20
QS SUFFIX
CASE 492A
1
20
FST3245
AWLYWW
20
1
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