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CY74FCT16952T

更新时间： 2024-11-11 05:31:03
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德州仪器 - TI /
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8页 70K
描述
16-Bit Registered Transceivers

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CY74FCT16952T 数据手册

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1CY74FCT162H952  
T
Data sheet acquired from Cypress Semiconductor Corporation.  
Data sheet modified to remove devices not offered.  
CY74FCT16952T  
CY74FCT162952T  
CY74FCT162H952T  
SCCS065A - August 1994 - Revised March 2000  
16-Bit Registered Transceivers  
• Eliminates the need for external pull-up or pull-down  
Features  
resistors  
• FCT-E speed at 3.7 ns  
• Power-off disable outputs permits live insertion  
Functional Description  
• Edge-rate control circuitry for significantly improved  
These 16-bit registered transceivers are high-speed,  
low-power devices. 16-bit operation is achieved by connecting  
the control lines of the two 8-bit registered transceivers  
together. For data flow from bus A-to-B, CEAB must be LOW  
to allow data to be stored when CLKAB transitions from  
LOW-to-HIGH. The stored data will be present on the output  
when OEAB is LOW. Control of data from B-to-A is similar and  
is controlled by using the CEBA, CLKBA, and OEBA inputs.  
The output buffers are designed with a power-off disable  
feature to allow for live insertion of boards.  
noise characteristics  
• Typical output skew < 250 ps  
• ESD > 2000V  
• TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)  
packages  
• Industrial temperature range of –40˚C to +85˚C  
• VCC = 5V ± 10%  
CY74FCT16952T Features:  
• 64 mA sink current, 32 mA source current  
• Typical VOLP (ground bounce) <1.0V at  
VCC = 5V, TA = 25˚C  
The CY74FCT16952T is ideally suited for driving  
high-capacitance loads and low-impedance backplanes.  
The CY74FCT162952T has 24-mA balanced output drivers  
with current-limiting resistors in the outputs. This reduces the  
need for external terminating resistors and provides for  
minimal undershoot and reduced ground bounce. The  
CY74FCT162952T is ideal for driving transmission lines.  
CY74FCT162952T Features:  
• Balanced 24 mA output drivers  
• Reduced system switching noise  
• Typical VOLP (ground bounce) <0.6V at  
The CY74FCT162H952T 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.  
VCC = 5V, TA= 25˚C  
CY74FCT162H952T Features:  
• Bus hold retains last active state  
Pin Configuration  
LogicBlock Diagrams  
SSOP/TSSOP  
Top View  
OEAB  
1
2
56  
55  
OEBA  
CLKBA  
1
1
1
CEBA  
CEBA  
2
1
CLKAB  
CEAB  
1
CEBA  
3
4
54  
53  
1
1
CLKBA  
OEAB  
CLKBA  
OEAB  
1
2
GND  
A
GND  
B
1
2
2
5
6
7
52  
51  
50  
1
1
1
1
CEAB  
CEAB  
1
B
2
A
1
1
2
V
V
CC  
CC  
A
CLKAB  
OEBA  
CLKAB  
OEBA  
2
1
2
B
3
8
9
49  
48  
1
3
1
A
B
4
1
1
4
1
B
5
A
5
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
1
C
C
1
A
A
2 1  
CE  
D
CE  
D
GND  
B
1
1
GND  
A
B
B
2
1
1
1
1
1
6
1
1
6
C
CE  
D
C
CE  
D
A
7
B
7
A
B
1 8  
1
8
A
B
2 1  
2
1
B
A
2
2
2
2
2
B
3
A
FCT16952–1  
FCT16952–2  
2
3
GND  
A
GND  
B
TO 7 OTHER CHANNELS  
TO 7 OTHER CHANNELS  
2
4
2
4
A
5
B
2 5  
2
B
A
2
6
2
6
V
CC  
V
CC  
B
7
A
2
2
2
7
B
8
A
24  
25  
26  
27  
28  
33  
32  
31  
30  
29  
2
8
GND  
CEAB  
GND  
CEBA  
2
2
CLKAB  
CLKBA  
OEBA  
2
2
2
OEAB  
2
FCT16952–3  
Copyright © 2000, Texas Instruments Incorporated  
12345678

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