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74FCT162245TPVCTG4 データシート(PDF) 1 Page - Texas Instruments

部品番号 74FCT162245TPVCTG4
部品情報  16-Bit Transceivers
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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74FCT162245TPVCTG4 データシート(HTML) 1 Page - Texas Instruments

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16-Bit Transceivers
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
SCCS026B - July 1994 - Revised September 2001
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
Copyright
© 2001, Texas Instruments Incorporated
1CY74FCT16445T/2
H245T
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%
CY74FCT16245T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce)<1.0V at VCC = 5V,
TA = 25˚C
CY74FCT162245T Features:
• Balanced output drivers: 24 mA
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at VCC = 5V,
TA= 25˚C
CY74FCT162H245T Features:
• Bus hold on data inputs
• Eliminates the need for external pull-up or pull-down
resistors
Functional Description
These 16-bit transceivers are designed for use in bidirectional
synchronous communication between two buses, where high
speed and low power are required. With the exception of the
CY74FCT16245T, these devices can be operated either as
two independent octals or a single 16-bit transceiver. Direction
of data flow is controlled by (DIR), the Output Enable (OE)
transfers data when LOW and isolates the buses when HIGH.
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
CY74FCT16245T
is
ideally
suited
for
driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162245T has 24-mA balanced output drivers
with current limiting resistors in the outputs. This reduces the
need for external terminating resistors and provides for mini-
mal
undershoot
and
reduced
ground
bounce.
The
CY74FCT162245T is ideal for driving transmission lines.
The CY74FCT162H245T 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.
GND
Logic Block Diagrams CY74FCT16245T,CY74FCT162245T,
CY74FCT162H245T
Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
33
32
31
30
29
25
26
27
28
36
35
1DIR
34
SSOP/TSSOP
Top View
13
14
15
16
17
18
19
20
21
22
23
24
45
44
43
42
41
37
38
39
40
48
47
46
1B1
1B2
1B3
1B4
1A1
1A2
1A3
1A4
1OE
GND
GND
VCC
1B7
1B8
1B5
1B6
1A5
1A6
1A7
1A8
VCC
GND
GND
2B3
2B4
2B1
2B2
2A1
2A2
2A3
2A4
GND
GND
VCC
2B7
2B8
2B5
2B6
2A5
2A6
2A7
2A8
VCC
GND
2DIR
2OE
FCT16245–1
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1OE
1B1
1B2
1B3
1B4
1B5
1B6
1B7
1DIR
1A8
1B8
FCT16245–2
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2OE
2B1
2B2
2B3
2B4
2B5
2B6
2B7
2DIR
2A8
2B8
FCT16245–3
16245T
162245T
162H245T


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