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74FCT162952ETPVCT Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza 74FCT162952ETPVCT
Descripción Electrónicos  16-Bit Registered Transceivers
Download  22 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
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74FCT162952ETPVCT Datasheet(HTML) 1 Page - Texas Instruments

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16-Bit Registered Transceivers
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
SCCS065C - August 1994 - Revised September 2001
Copyright
© 2001, Texas Instruments Incorporated
1CY74FCT162H952
T
Features
•Ioff supports partial-power-down mode operation
• 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 –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
CY74FCT162952T Features:
• Balanced 24 mA output drivers
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at
VCC = 5V, TA= 25˚C
CY74FCT162H952T Features:
• Bus hold retains last active state
• Eliminates the need for external pull-up or pull-down
resistors
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.
This
device
is
fully
specified
for
partial-power-down
applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device
when it is powered down.
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 “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.
Logic Block Diagrams
Pin Configuration
1 OEAB
SSOP/TSSOP
Top View
1 CLKBA
1B1
1B2
GND
VCC
GND
GND
FCT16952–1
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
1 CEAB
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
2B
1
2OEAB
2CEAB
2 CLKAB
2 OEBA
2A1
D
C
CE
D
C
CE
2CEBA
FCT16952–2
FCT16952–3
TO 7 OTHER CHANNELS


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