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74FCT16245 PDF预览

74FCT16245

更新时间: 2024-10-27 22:49:47
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德州仪器 - TI /
页数 文件大小 规格书
9页 72K
描述
16-bIT TRANSCEI

74FCT16245 数据手册

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1CY74FCT16445T/2  
H245T  
Data sheet acquired from Cypress Semiconductor Corporation.  
Data sheet modified to remove devices not offered.  
CY74FCT16245T  
CY74FCT162245T  
CY74FCT162H245T  
SCCS026 - July 1994 - Revised March 2000  
16-Bit Transceivers  
Features  
Functional Description  
FCT-E speed at 3.2 ns  
Power-off disable outputs permits live insertion  
Edge-rate control circuitry for significantly improved  
noise characteristics  
Typical output skew < 250 ps  
ESD > 2000V  
TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)  
packages  
These 16-bit transceivers are designed for use in bidirectional  
synchronous communication between two buses, where high  
speed and low power are required. With the exception of the  
CY74FCT16245T, these devices can be operated either as  
two independent octals or a single 16-bit transceiver. Direction  
of data flow is controlled by (DIR), the Output Enable (OE)  
transfers data when LOW and isolates the buses when HIGH.  
The output buffers are designed with power off disable capa-  
bility to allow for live insertion of boards.  
Industrial temperature range of –40˚C to +85˚C  
VCC = 5V ± 10%  
The CY74FCT16245T is ideally suited for driving  
high-capacitance loads and low-impedance backplanes.  
The CY74FCT162245T has 24-mA balanced output drivers  
with current limiting resistors in the outputs. This reduces the  
need for external terminating resistors and provides for mini-  
mal undershoot and reduced ground bounce. The  
CY74FCT162245T is ideal for driving transmission lines.  
CY74FCT16245T Features:  
64 mA sink current, 32 mA source current  
Typical VOLP (ground bounce)<1.0V at VCC = 5V,  
TA = 25˚C  
CY74FCT162245T Features:  
The CY74FCT162H245T is a 24-mA balanced output part that  
has bus hold on the data inputs. The device retains the input’s  
last state whenever the input goes to high impedance. This  
eliminates the need for pull-up/down resistors and prevents  
floating inputs.  
Balanced output drivers: 24 mA  
Reduced system switching noise  
Typical VOLP (ground bounce) <0.6V at VCC = 5V,  
TA= 25˚C  
CY74FCT162H245T Features:  
Bus hold on data inputs  
Eliminates the need for external pull-up or pull-down  
resistors  
Logic Block Diagrams CY74FCT16245T,CY74FCT162245T,  
CY74FCT162H245T  
Pin Configuration  
SSOP/TSSOP  
Top View  
DIR  
DIR  
2
1
OE  
OE  
1
2
3
4
48  
47  
46  
DIR  
B
OE  
1
2
1
1
1
1
A
1
1
1
1
2
A
A
1
1
1
2
B
A
2
GND  
B
GND  
A
45  
44  
43  
42  
41  
B
B
B
B
1
1
2
2
1
5
6
7
8
9
1
1
3
4
1
3
A
A
2
1
1
2
2
2
B
A
4
1
V
CC  
V
CC  
1
2
2
16245T  
162245T  
B
A
5
1
1
5
6
1
1
A
3
A
3
162H245T  
B
A
6
40  
39  
38  
B
B
3
1
3
2
GND  
GND  
10  
11  
B
A
7
1
1
7
8
1
1
A
A
4
1
4
2
2
B
A
8
12  
13  
37  
36  
35  
34  
B
B
B
4
B
5
1
1
4
5
2
2
B
B
A
1
2
2
1
2
2
14  
15  
16  
17  
18  
A
2
A
A
5
2
1
5
GND  
GND  
33  
32  
31  
30  
29  
28  
27  
26  
25  
B
3
B
4
A
3
2
2
2
2
A
A
6
A
4
1
6
2
2
V
V
CC  
CC  
B
B
B
B
B
6
B
7
B
8
1
1
1
6
7
8
2
2
2
A
5
19  
20  
21  
22  
23  
24  
2
5
6
2
2
A
A
7
B
A
6
1
7
2
GND  
B
GND  
A
2
2
7
8
2
7
A
A
8
B
A
1
8
2
2
2
8
DIR  
OE  
2
FCT16245–3  
FCT16245–1  
FCT16245–2  
Copyright © 2000, Texas Instruments Incorporated  

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