鈥?/div>
V
CC
= 5V
鹵
10%
Functional Description
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 鏗俹w 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.
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.
The CY74FCT162H952T is a 24-mA balanced output part that
has 鈥渂us hold鈥?on the data inputs. The device retains the
input鈥檚 last state whenever the input goes to high impedance.
This eliminates the need for pull-up/down resistors and
prevents 鏗俹ating inputs.
CY74FCT16952T Features:
鈥?/div>
64 mA sink current, 32 mA source current
鈥?/div>
Typical V
OLP
(ground bounce) <1.0V at
V
CC
= 5V, T
A
= 25藲C
CY74FCT162952T Features:
鈥?/div>
Balanced 24 mA output drivers
鈥?/div>
Reduced system switching noise
鈥?/div>
Typical V
OLP
(ground bounce) <0.6V at
V
CC
= 5V, T
A
= 25藲C
CY74FCT162H952T Features:
鈥?/div>
Bus hold retains last active state
Logic Block Diagrams
Pin Configuration
SSOP/TSSOP
Top View
1
OEAB
1
CEBA
1
CLKBA
1
OEAB
1
CEAB
1
CLKAB
1
OEBA
1
A
1
2
CEBA
2
CLKBA
2
OEAB
2
CEAB
2
CLKAB
2
OEBA
1
CLKAB
1
CEAB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1
OEBA
1
CLKBA
1
CEBA
GND
1
A
1
1
A
2
V
CC
1
A
3
1
A
4
1
A
5
2
B
GND
1
B
1
1
B
2
V
CC
1
B
3
1
B
4
1
B
5
C
CE
D
C
CE
D
1
B
1
2
A
1
C
CE
D
C
CE
D
GND
1
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
GND
1
B
6
1
B
7
1
B
8
2
B
1
2
B
2
2
B
3
FCT16952鈥?
FCT16952鈥?
2
A
3
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
GND
2
A
4
2
A
5
2
A
6
GND
2
B
4
2
B
5
2
B
6
V
CC
2
A
7
2
A
8
V
CC
2
B
7
2
B
8
GND
2
CEAB
2
CLKAB
2
OEAB
GND
2
CEBA
2
CLKBA
2
OEBA
FCT16952鈥?
Copyright
漏
2000, Texas Instruments Incorporated
CY74FCT162H952TSSOP相關(guān)型號PDF文件下載
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