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74FCT163H952CPACT Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte 74FCT163H952CPACT
Spiegazioni elettronici  16-Bit Registered Transceivers
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16-Bit Registered Transceivers
CY74FCT163952
CY74FCT163H952
SCCS048A - March 1997 - Revised November 2000
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
Copyright
© 2000, Texas Instruments Incorporated
1CY74FCT163952
Features
• Low power, pin-compatible replacement for LCX and
LPT families
• 5V tolerant inputs and outputs
• 24 mA balanced drive outputs
• Power-off disable outputs permit live insertion
• Edge-rate control circuitry for reduced noise
• FCT-C speed at 4.4 ns
• Latch-up performance exceeds JEDEC standard no. 17
• Typical output skew < 250 ps
• Industrial temperature range of –40˚C to +85˚C
• TSSOP (19.6-mil pitch) or SSOP (25-mil pitch)
• Typical
Volp (ground bounce) performance exceeds Mil
Std 883D
•VCC = 2.7V to 3.6V
• ESD (HBM) > 2000V
CY74FCT163H952
• Bus hold on data inputs
• Eliminates the need for external pull-up or pull-down
resistors
• Devices with bus hold are not recommended for trans-
lating rail-to-rail CMOS signals to 3.3V logic levels
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 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 outputs are 24-mA balanced output drivers with current
limiting resistors to reduce the need for external terminating
resistors and provide for minimal undershoot and reduced
ground bounce.
The CY74FCT163H952 has “bus hold” on the data inputs,
which retains the input’s last state whenever the source driving
the input goes to high impedance. This eliminates the need for
pull-up/down resistors and prevents floating inputs.
The CY74FCT163952 is designed with inputs and outputs
capable of being driven by 5.0V buses, allowing its use in
mixed voltage systems as a translator. The outputs are also
designed with a power off disable feature enabling its use in
applications requiring live insertion.
Logic Block Diagrams; CY74FCT163952, CY74FCT163H952
Pin Configuration
1OEAB
SSOP/TSSOP
Top View
1 CLKBA
1B1
1B2
GND
VCC
GND
GND
1B1
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
1CEBA
1OEAB
1CEAB
1 CLKAB
1 OEBA
1A1
D
C
CE
D
C
CE
1CEAB
1 CLKAB
GND
1A1
1A2
1A3
1A4
GND
2A1
2A2
2A3
2A4
VCC
1A5
1A6
1A7
1A8
GND
2A5
2A6
2A7
2A8
2 CLKAB
GND
2OEAB
2CEAB
VCC
1 OEBA
1CEBA
1 CLKBA
GND
2 CLKBA
2 OEBA
2CEBA
1B3
1B6
1B7
1B8
1B4
1B5
2B1
2B3
2B4
2B2
2B5
2B6
2B7
2B8
VCC
2 CLKBA
2B1
2OEAB
2CEAB
2 CLKAB
2 OEBA
2A1
D
C
CE
D
C
CE
2CEBA
TO 7 OTHER CHANNELS


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