參數(shù)資料
型號(hào)： 74FCT16244
廠商： Texas Instruments, Inc.
英文描述： 16-Bit Buffers/Line Drivers
中文描述： 16位緩沖器/線路驅(qū)動(dòng)器
文件頁(yè)數(shù)： 1/8頁(yè)
文件大小： 64K
代理商： 74FCT16244
16-Bit Buffers/Line Drivers
SCCS028 - December 1987 - Revised March 2000
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Copyright
2000, Texas Instruments Incorporated
1CY74FCT16444T/2
H244T
Features
FCT-E speed at 3.2 ns
Power-off disable outputs permits live insertion
Edge-rate control circuitry for significantly improved
noise characteristics
Typical output skew < 250 ps
TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)
packages
Industrial temperature range of –40C to +85C
V
CC
= 5V
±
10%
CY74FCT16244T Features:
64 mA sink current, 32 mA source current
Typical V
OLP
(ground bounce)
<1.0V at V
CC
= 5V, T
A
= 25C
CY74FCT162244T Features:
Balanced output drivers: 24 mA
Reduced system switching noise
Typical V
OLP
(ground bounce)
<0.6V at V
CC
= 5V, T
A
= 25C
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
memorydriver,clockdriver,orotherbusinterfaceapplications,
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. The outputs are de-
signed with a power-off disable feature to allow for live
insertion of boards.
The
CY74FCT16244T
is
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
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.
ideally
suited
for
driving
ground
bounce.
The
GND
1
A
3
1
A
4
V
CC
Logic Block Diagrams CY74FCT16244T, CY74FCT162244T,
CY74FCT162H244T
Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
33
32
31
30
29
28
25
26
27
36
35
34
1
OE
1
Y
1
1
Y
2
GND
SSOP/TSSOP
Top View
1
Y
1
1
Y
2
1
Y
3
1
Y
4
14
15
16
17
18
19
20
21
22
23
24
45
44
43
42
41
37
38
39
40
48
47
46
1
A
1
1
A
2
1
A
3
1
A
4
1
OE
2
Y
1
2
Y
2
2
Y
3
2
Y
4
2
A
1
2
A
2
2
A
3
2
A
4
2
OE
1
Y
3
1
Y
4
V
CC
2
Y
1
2
Y
2
GND
1
A
1
1
A
2
2
OE
GND
2
A
3
2
A
4
3
A
1
3
A
2
2
Y
3
2
Y
4
3
Y
1
3
Y
2
GND
2
A
1
2
A
2
GND
3
A
3
3
A
4
V
CC
3
Y
3
3
Y
4
V
CC
4
Y
1
4
Y
2
GND
GND
4
A
3
4
A
4
3
OE
4
Y
3
4
Y
4
4
OE
4
A
1
4
A
2
3
Y
1
3
Y
2
3
Y
3
3
Y
4
3
A
1
3
A
2
3
A
3
3
A
4
3
OE
4
Y
1
4
Y
2
4
Y
3
4
Y
4
4
A
1
4
A
2
4
A
3
4
A
4
4
OE
FCT16244–1
FCT16244–2
FCT16244–3
FCT16244–4
FCT16244–5
16244T
162244T
162H244T
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