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參數(shù)資料
| 型號： | 74F245SC |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal Bidirectional Transceiver with 3-STATE Outputs |
| 中文描述： | F/FAST SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | 0.300 INCH, MS-013, SOIC-20 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 91K |
| 代理商： | 74F245SC |
Philips Semiconductors
Product specification
74F245
Octal transceiver (3-State)
2
November 15, 1994
853–0025 14256
FEATURES
Octal bidirectional bus interface
3-State buffer outputs sink 64mA
15mA source current
Outputs are placed in high impedance state during power-off
conditions
DESCRIPTION
The 74F245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both transmit and receive directions. The
B port outputs are capable of sinking 64mA and sourcing 15mA,
producing very good capacitive drive characteristics. The device
features an Output Enable (OE) input for easy cascading and
Transmit/Receive (T/R) input for direction control. The 3-State
outputs, B0–B7, have been designed to prevent output bus loading if
the power is removed from the device.
PIN CONFIGURATION
SF00198
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
V
CC
OE
B0
B1
B2
B3
B4
B6
B5
B7
TYPE
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT (TOTAL)
74F245
4.0ns
70mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%, T
amb
= 0
°
C to +70
°
C
N74F245N
DRAWING NUMBER
20-Pin Plastic DIP
SOT146-1
20-Pin Plastic SO
N74F245D
SOT163-1
20-Pin Plastic SSOP Type II
N74F245DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F (U.L.) HIGH/LOW
LOAD VALUE HIGH/LOW
70
μ
A/0.6mA
20
μ
A/1.2mA
20
μ
A/1.2mA
3.0mA/24mA
A0–A7, B0–B7
Data inputs
3.5/1.0
OE
Output Enable input (active Low)
1.0/2.0
T/R
Transmit/Receive input
1.0/2.0
A0–A7
A port outputs
150/40
B0–B7
B port outputs
750/106.7
15mA/64mA
NOTE:
One (1.0) FAST unit load is defined as: 20
μ
A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
B2
B3
B4
B5
16
15
14
13
2
3
4
V
= Pin 20
GND = Pin 10
SF00199
B1
17
B0
18
19
1
OE
T/R
A0
A1
A2
A3
A4
A5
5
6
7
B6
B7
12
11
A6
A7
8
9
IEC/IEEE SYMBOL
SF00200
G3
19
3EN1 (BA)
3EN1 (AB)
1
1
2
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F245SJ | Octal Bidirectional Transceiver with 3-STATE Outputs |
| 74F251A | 8-input multiplexer 3-State |
| 74F253 | Dual 4-bit input multiplexer (3-State)(雙4位輸入多路復(fù)用器（三態(tài)）) |
| 74F256 | Dual addressable latch |
| 74F257ASCX | 2-Input Digital Multiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F245SC | 制造商:Fairchild Semiconductor Corporation 功能描述:74F FAST TTL SMD 74F245 SOIC20 |
| 74F245SC_Q | 功能描述:總線收發(fā)器 Octal Bidir Trans RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74F245SC-NL | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Octal Bidirectional Transceiver with 3-STATE Outputs |
| 74F245SCX | 功能描述:總線收發(fā)器 Octal Bidir Trans RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| 74F245SJ | 功能描述:總線收發(fā)器 Octal Bidir Trans RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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