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參數(shù)資料
| 型號(hào)： | 74ALS245ADB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal transceiver 3-State |
| 中文描述： | ALS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | 5.30 MM, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 116K |
| 代理商： | 74ALS245ADB |
Philips Semiconductors
Product specification
74ALS245A/74ALS245A-1
Octal transceiver (3-State)
2
1991 Jun 03
853–0011 02709
FEATURES
Octal bidirectional bus interface
3-State buffer outputs sink 24mA and source 15mA
Outputs are placed in high impedance state during power-off
conditions
The -1 version sinks 48mA
DESCRIPTION
The 74ALS245A is an octal transceiver featuring non-inverting
3-State bus compatible outputs in both transmit and receive
directions. The device features an output enable (OE) input for easy
cascading and transmit/receive (R/T) input for direction control.
The 74ALS245A-1 is the same as the 74ALS245A except that both
ports sink 48mA within the
±
5% V
CC
range.
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS245A
7.0ns
34mA
74ALS245A-1
7.0ns
34mA
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
ORDERING INFORMATION
ORDER CODE
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
74ALS245AN,
74ALS245A-1N
DESCRIPTION
DRAWING
NUMBER
20-pin plastic DIP
SOT146-1
20-pin plastic SOL
74ALS245AD,
744ALS245A-1D
SOT163-1
20-pin plastic SSOP
Type II
74ALS245ADB,
74ALS245A-1DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
20
μ
A/0.1mA
20
μ
A/0.1mA
20
μ
A/0.1mA
15mA/24mA
A0 – A7, B0 – B7
Data inputs
1.0/1.0
OE
Output Enable input (active-Low)
1.0/1.0
T/R
Transmit/receive input
1.0/1.0
A0 – A7
A port outputs
750/240
B0 – B7
B port outputs
750/240
15mA/24mA
A0 – A7
A port outputs (-1 version)
750/480
15mA/48mA
B0 – B7
One (1.0) ALS unit load is defined as: 20
μ
A in the High state and 0.1mA in the Low state.
B port outputs (-1 version)
750/480
15mA/48mA
NOTE:
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74ALS245AN | Octal transceiver 3-State |
| 74ALS245 | Octal 3-STATE Bus Transceiver |
| 744ALS645A-1D | PWR SUPP DESKTOP 5V 15W |
| 74ALS645A-1N | Octal transceiver 3-State |
| 74ALS645A-1 | Octal transceiver 3-State |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74ALS245ADW | 制造商:Texas Instruments 功能描述: |
| 74ALS245AN | 制造商:NXP Semiconductors 功能描述: |
| 74ALS251 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-input multiplexer 3-State |
| 74ALS251D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-input multiplexer 3-State |
| 74ALS251N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-input multiplexer 3-State |
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