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參數(shù)資料
| 型號(hào)： | 74F2245 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Octal Bidirectional Transceiver with TRI-STATE Outputs |
| 中文描述： | 八路雙向收發(fā)器具有三態(tài)輸出 |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 103K |
| 代理商： | 74F2245 |
Philips Semiconductors
Product specification
74F2245
Octal transceiver with 30 equivalent output termination
(3-State)
2
1996 May 10
853-1833 16802
FEATURES
Octal bidirectional bus interface
30 Ohm output termination for driving DRAM
Outputs are placed in high impedance state during power-off
conditions
SSOP Type II package
DESCRIPTION
The 74F2245 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 (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.
The 30 Ohm series termination on the outputs reduces
over/undershoot making them ideal for driving DRAM.
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)
74F2245
4.0ns
70mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%, T
amb
= 0
°
C to +70
°
C
N74F2245N
DRAWING NUMBER
20-Pin Plastic DIP
SOT146-1
20-Pin Plastic SOL
N74F2245D
SOT163-1
20-Pin Plastic SSOP
N74F2245DB
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/5mA*
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
150/8
B0-B7
B port outputs
150/8
3.0mA/5mA*
NOTE:
One (1.0) FAST unit load is defined as: 20
μ
A in the High state and 0.6mA in the Low state.
*
12mA with reduced noise margin
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F2245SC | Octal Bidirectional Transceiver with TRI-STATE Outputs |
| 74F2245SCX | Octal Bidirectional Transceiver with TRI-STATE Outputs |
| 74F224 | 16 】 4 Synchronous FIFO 3-State |
| 74F225 | BRIDGE RECTIFIER, 4A, 800V |
| 74F2373 | Octal transparent latch with 30Ωequivalent output termination (3-State)(帶30Ω等值輸出終端電阻的八透明鎖存器（三態(tài)）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F2245 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F2245SC | 功能描述:總線收發(fā)器 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(shí)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 |
| 74F2245SCX | 功能描述:總線收發(fā)器 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(shí)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 |
| 74F225 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:16X5 asynchronous FIFO 3-State |
| 74F225AI | 功能描述:固定電感器 22uH 10% RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
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