參數(shù)資料
型號: 74FCT162952BTPVCT
廠商: Texas Instruments, Inc.
元件分類: 通用總線功能
英文描述: 16-Bit Registered Transceivers
中文描述: 16位注冊收發(fā)器
文件頁數(shù): 1/8頁
文件大?。?/td> 68K
代理商: 74FCT162952BTPVCT
16-Bit Registered Transceivers
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
SCCS065A - August 1994 - Revised March 2000
Copyright
2000, Texas Instruments Incorporated
1CY74FCT162H952
T
Features
FCT-E speed at 3.7 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
Industrial temperature range of –40C to +85C
V
CC
= 5V
±
10%
CY74FCT16952T Features:
64 mA sink current, 32 mA source current
Typical V
(ground bounce) <1.0V at
V
CC
= 5V, T
A
= 25C
CY74FCT162952T Features:
Balanced 24 mA output drivers
Reduced system switching noise
Typical V
(ground bounce) <0.6V at
V
CC
= 5V, T
A
= 25C
CY74FCT162H952T Features:
Bus hold retains last active state
Eliminates the need for external pull-up or pull-down
resistors
Functional Description
These
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.
The
CY74FCT16952T
is
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 “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.
16-bit
registered
transceivers
are
high-speed,
ideally
suited
for
driving
LogicBlockDiagrams
Pin Configuration
SSOP/TSSOP
Top View
1
OEAB
1
CLKAB
1
CLKBA
1
B
1
1
B
2
V
CC
1
B
3
1
B
4
1
B
5
GND
1
B
6
1
B
7
1
B
8
2
B
1
2
B
2
GND
2
B
4
2
B
5
2
B
6
V
CC
GND
2
CEBA
FCT16952–1
1
B
1
TO 7 OTHER CHANNELS
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
CEBA
1
OEAB
1
CEAB
1
CLKAB
1
OEBA
1
A
1
D
C
CE
D
C
CE
1
CEAB
GND
1
A
1
1
A
2
V
CC
1
A
3
1
A
4
1
A
5
GND
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
2
A
3
GND
2
A
4
2
A
5
2
A
6
V
CC
2
A
7
2
A
8
GND
2
CEAB
2
CLKAB
2
OEAB
1
OEBA
1
CLKBA
1
CEBA
GND
2
CLKBA
2
OEBA
2
B
3
2
B
7
2
B
8
2
CLKBA
2
B
1
2
OEAB
2
CEAB
2
CLKAB
2
OEBA
2
A
1
D
C
CE
D
C
CE
2
CEBA
FCT16952–2
FCT16952–3
TO 7 OTHER CHANNELS
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