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74FCT162244CTPVCG4 датащи(PDF) 1 Page - Texas Instruments

номер детали 74FCT162244CTPVCG4
подробное описание детали  16-Bit Buffers/Line Drivers
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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74FCT162244CTPVCG4 датащи(HTML) 1 Page - Texas Instruments

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16-Bit Buffers/Line Drivers
SCCS028B - December 1987 - Revised September 2001
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Copyright
© 2001, Texas Instruments Incorporated
1CY74FCT16444T/2
H244T
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%
CY74FCT16244T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce)
<1.0V at VCC = 5V, TA = 25˚C
CY74FCT162244T Features:
• Balanced output drivers: 24 mA
• Reduced system switching noise
• Typical VOLP (ground bounce)
<0.6V at VCC = 5V, TA= 25˚C
CY74FCT162H244T Features:
• Bus hold on data inputs
• Eliminates the need for external pull-up or pull-down
resistors
Functional Description
These 16-bit buffers/line drivers are designed for use in
memory driver, clock driver, or other bus interface applications,
where high-speed and low power are required. With
flow-through pinout and small shrink packaging board layout
is simplified. The three-state controls are designed to allow
4-bit, 8-bit or combined 16-bit operation.
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
CY74FCT16244T
is
ideally
suited
for
driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162244T 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
CY74FCT162244T is ideal for driving transmission lines.
The CY74FCT162H244T is a 24-mA balanced output part that
has “bus hold” on the data inputs. The device retains the in-
put’s last state whenever the input goes to high impedance.
This eliminates the need for pull-up/down resistors and pre-
vents floating inputs.
GND
Logic Block Diagrams CY74FCT16244T, CY74FCT162244T,
CY74FCT162H244T
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
1OE
34
SSOP/TSSOP
Top View
1Y1
1Y2
1Y3
1Y4
13
14
15
16
17
18
19
20
21
22
23
24
45
44
43
42
41
37
38
39
40
48
47
46
1A1
1A2
1A3
1A4
1OE
2Y1
2Y2
2Y3
2Y4
2A1
2A2
2A3
2A4
2OE
1Y1
1Y2
1Y3
1Y4
1A1
1A2
1A3
1A4
2OE
GND
GND
VCC
2Y3
2Y4
2Y1
2Y2
2A1
2A2
2A3
2A4
VCC
GND
GND
3Y3
3Y4
3Y1
3Y2
3A1
3A2
3A3
3A4
GND
GND
VCC
4Y3
4Y4
4Y1
4Y2
4A1
4A2
4A3
4A4
VCC
GND
4OE
3OE
3Y1
3Y2
3Y3
3Y4
3A1
3A2
3A3
3A4
3OE
4Y1
4Y2
4Y3
4Y4
4A1
4A2
4A3
4A4
4OE
FCT16244–1
FCT16244–2
FCT16244–3
FCT16244–4
FCT16244–5
16244T
162244T
162H244T


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