74FCT16244 [TI]
16-Bit Buffers/Line Drivers; 16位缓冲器/线路驱动器
| 型号： | 74FCT16244 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 16-Bit Buffers/Line Drivers |
| 文件： | 总8页 (文件大小：67K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1CY74FCT16444T/2
H244T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
SCCS028 - December 1987 - Revised March 2000
16-Bit Buffers/Line Drivers
Features
Functional Description
• 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
• 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%
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. The outputs are de-
signed with a power-off disable feature to allow for live
insertion of boards.
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.
CY74FCT16244T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce)
<1.0V at VCC = 5V, TA = 25˚C
CY74FCT162244T Features:
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.
• 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
Logic Block Diagrams CY74FCT16244T, CY74FCT162244T,
CY74FCT162H244T
Pin Configuration
SSOP/TSSOP
Top View
OE
OE
3
1
1
2
3
4
48
47
46
OE
Y
OE
1
2
1
1
A
1
1
1
A
A
3
1
1
1
1
1
Y
Y
3
1
1
1
1
1
Y
2
A
2
1
GND
Y
GND
A
45
44
43
A
2
A
2
3
3
16244T
162244T
Y
2
Y
2
5
3
3
1
1
3
1
1
3
Y
4
A
4
6
162H244T
V
CC
V
CC
42
7
A
3
A
3
Y
3
Y
3
Y
A
1
2
2
1
2
2
41
8
Y
2
A
2
9
40
39
38
37
36
35
34
33
32
31
A
4
A
4
1
3
Y
4
Y
4
GND
GND
1
3
10
11
Y
A
3
2
2
3
3
3
2
2
3
3
FCT16244–1
FCT16244–2
Y
4
A
4
12
13
Y
1
A
1
14
15
16
17
18
19
20
21
22
23
24
Y
2
A
2
OE
OE
4
2
GND
GND
Y
A
3
3
3
3
3
A
A
1
2
1
4
4
4
Y
Y
4
1
2
2
2
1
Y
4
A
4
3
V
V
CC
CC
Y
A
1
30
29
28
27
26
25
A
2
4
1
4
4
A
2
2
Y
Y
2
2
4
4
Y
2
A
2
4
GND
Y
GND
A
A
3
A
2
2
3
Y
Y
3
3
4
4
3
4
3
Y
4
A
4
3
4
OE
OE
4
A
4
A
4
4
Y
Y
4
2
4
4
FCT16244–3
FCT16244–4
FCT16244–5
Copyright © 2000, Texas Instruments Incorporated
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Maximum Ratings [3,4]
Pin Description
(Above which the useful life may be impaired. For user
guidelines, not tested.)
Name
Description
OE
A
Three-State Output Enable Inputs (Active LOW)
Data Inputs[1]
Storage Temperature................................. –55°C to +125°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Y
Three-State Outputs
DC Input Voltage ........................................... –0.5V to +7.0V
DC Output Voltage......................................... –0.5V to +7.0V
Function Table[2]
DC Output Current
(Maximum Sink Current/Pin) ........................–60 to +120 mA
Inputs
Outputs
Power Dissipation..........................................................1.0W
OE
L
A
L
Y
L
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
L
H
X
H
Z
Ordering Range
H
Ambient
Range
Industrial
Temperature
VCC
– 40°C to +85°C
5V ± 10%
Notes:
1. On CY74FCT162H244T these pins have “bus hold.”
2. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Importance.
3. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature range.
4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.
Electrical Characteristics Over the Operating Range
Parameter
VIH
Description
Input HIGH Voltage
Test Conditions
Min.
Typ.[5]
Max.
Unit
V
2.0
VIL
VH
VIK
IIH
Input LOW Voltage
Input Hysteresis[6]
0.8
V
100
mV
V
Input Clamp Diode Voltage
Input HIGH Current
VCC=Min., IIN=–18 mA
VCC=Max., VI=VCC
–0.7
–1.2
±1
Standard
Bus Hold
Standard
Bus Hold
µA
±100
±1
IIL
Input LOW Current
VCC=Max., VI=GND
µA
µA
µA
±100
IBBH
IBBL
Bus Hold Sustain Current on Bus Hold Input[7]
VCC=Min.
VI=2.0V
VI=0.8V
–50
+50
IBHHO
IBHLO
Bus Hold Overdrive Current on Bus Hold Input[7] VCC=Max., VI=1.5V
TBD
±1
mA
µA
µA
IOZH
High Impedance Output Current
(Three-State Output pins)
VCC=Max., VOUT=2.7V
VCC=Max., VOUT=0.5V
IOZL
High Impedance Output Current
(Three-State Output pins)
±1
IOS
IO
Short Circuit Current[8]
Output Drive Current[8]
Power-Off Disable
VCC=Max., VOUT=GND
VCC=Max., VOUT=2.5V
VCC=0V, VOUT≤4.5V[9]
–80
–50
–140
–200
–180
±1
mA
mA
µA
IOFF
2
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Output Drive Characteristics for CY74FCT16244T
Parameter
VOH
Description
Test Conditions
VCC=Min., IOH=–3 mA
VCC=Min., IOH=–15 mA
VCC=Min., IOH=–32 mA
VCC=Min., IOL=64 mA
Min.
2.5
Typ.[5]
3.5
Max.
Unit
V
Output HIGH Voltage
2.4
3.5
V
2.0
3.0
V
VOL
Output LOW Voltage
0.2
0.55
V
Output Drive Characteristics for CY74FCT162244T, CY74FCT162H244T
Parameter
IODL
IODH
VOH
Description
Output LOW Current[8]
Output HIGH Current[8]
Output HIGH Voltage
Output LOW Voltage
Test Conditions
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
VCC=Min., IOH=–24 mA
Min.
60
Typ.[5]
Max.
150
Unit
mA
mA
V
115
–115
3.3
–60
2.4
–150
VOL
VCC=Min., IOL=24 mA
0.3
0.55
V
Notes:
5. Typical values are at VCC=5.0V, TA = +25˚C ambient.
6. This parameter is specified but not tested.
7. Pins with bus hold are described in Pin Description.
8. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, IOS tests should be performed last.
9. Tested at +25˚C.
3
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Capacitance[6](TA = +25˚C, f = 1.0 MHz)
Parameter
CIN
Description
Input Capacitance
Output Capacitance
Test Conditions
Test Conditions
Typ.[5]
4.5
Max.
6.0
Unit
pF
VIN = 0V
COUT
VOUT = 0V
5.5
8.0
pF
Power Supply Characteristics
Parameter
Description
Typ.[5]
Max.
Unit
ICC
Quiescent Power Supply Current VCC=Max.
V
IN≤0.2V,
5
500
µA
VIN≤VCC-0.2V
∆ICC
Quiescent Power Supply Current VCC=Max.
(TTL inputs HIGH)
VIN=3.4V[10]
0.5
60
1.5
mA
ICCD
Dynamic Power Supply
Current[11]
VCC=Max.,OneInputToggling, VIN=VCC or
50% Duty Cycle, Outputs
Open, OE=GND
100
µA/MHz
VIN=GND
IC
Total Power Supply Current[12]
VCC=Max., f1=10 MHz,
50% Duty Cycle, Outputs
Open, One Bit Toggling,
OE=GND
VIN=VCC or
VIN=GND
0.6
0.9
2.4
6.4
1.5
2.3
mA
mA
mA
mA
VIN=3.4V or
VIN=GND
VCC=Max., f1=2.5 MHz, 50% VIN=VCC or
Duty Cycle, Outputs Open, Six- VIN=GND
teen Bits Toggling,
VIN=3.4V or
OE=GND
4.5[13]
16.5[13]
VIN=GND
Notes:
10. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND.
11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
12. IC=IQUIESCENT + IINPUTS + IDYNAMIC
IC
=
=
=
=
=
=
=
=
=
ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC
ICC
DH
NT
ICCD
f0
Quiescent Current with CMOS input levels
Power Supply Current for a TTL HIGH input (VIN=3.4V)
Duty Cycle for TTL inputs HIGH
Number of TTL inputs at DH
Dynamic Current caused by an input transition pair (HLH or LHL)
Clock frequency for registered devices, otherwise zero
Input signal frequency
f1
N1
Number of inputs changing at f1
All currents are in milliamps and all frequencies are in megahertz.
13. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.
4
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
S
Switching Characteristics Over the Operating Range[14]
CY74FCT16244AT
CY74FCT162244AT
CY74FCT162H244AT
CY74FCT16244T
CY74FCT162244T
Parameter
Description
Min.
Max.
Min.
Max.
Unit
Fig. No.[15]
tPLH
tPHL
Propagation Delay Data to Output
1.5
6.5
1.5
4.8
ns
1, 3
tPZH
tPZL
Output Enable Time
Output Disable Time
Output Skew[16]
1.5
1.5
8.0
7.0
0.5
1.5
1.5
6.2
5.6
0.5
ns
ns
ns
1, 7, 8
1, 7, 8
—
tPHZ
tPLZ
tSK(O)
Switching Characteristics Over the Operating Range[14] (continued)
CY74FCT16244CT
CY74FCT162244CT
CY74FCT16244ET
CY74FCT162244ET
CY74FCT162H244CT CY74FCT162H244ET
Parameter
Description
Min.
Max.
Min.
Max.
Unit
Fig. No.[15]
tPLH
tPHL
Propagation Delay Data to Output
1.5
4.1
1.5
3.2
ns
1, 3
tPZH
tPZL
Output Enable Time
Output Disable Time
Output Skew[16]
1.5
1.5
5.8
5.2
0.5
1.5
1.5
4.4
3.6
0.5
ns
ns
ns
1, 7, 8
1, 7, 8
—
tPHZ
tPLZ
tSK(O)
Notes:
14. Minimum limits are specified but not tested on Propagation Delays.
15. See “Parameter Measurement Information” in the General Information section.
16. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.
5
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Ordering Information CY74FCT16244
Speed
Package
Name
Operating
(ns)
Ordering Code
CY74FCT16244ETPACT
CY74FCT16244ETPVC/PVCT
CY74FCT16244CTPACT
CY74FCT16244CTPVC/PVCT
CY74FCT16244ATPACT
CY74FCT16244ATPVC/PVCT
CY74FCT16244TPACT
Package Type
Range
3.2
Z48
O48
Z48
O48
Z48
O48
Z48
O48
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
Industrial
4.1
4.8
6.5
Industrial
Industrial
Industrial
CY74FCT16244TPVC/PVCT
Ordering Information CY74FCT162244
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
74FCT162244ETPACT
CY74FCT162244ETPVC
74FCT162244ETPVCT
74FCT162244CTPACT
CY74FCT162244CTPVC
74FCT162244CTPVCT
74FCT162244ATPACT
CY74FCT162244ATPVC
74FCT162244ATPVCT
CY74FCT162244TPACT
CY74FCT162244TPVC/PVCT
Package Type
3.2
Z48
O48
O48
Z48
O48
O48
Z48
O48
O48
Z48
O48
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
Industrial
Industrial
Industrial
Industrial
4.1
4.8
6.5
Ordering Information CY74FCT162H244
Speed
(ns)
Package
Operating
Range
Ordering Code
74FCT162H244ETPACT
74FCT162H244ETPVC/PVCT
74FCT162H244CTPVC/PVCT
74FCT162H244ATPACT
Name
Package Type
3.2
Z48
48-Lead (240-Mil) TSSOP
48-Lead (300-Mil) SSOP
48-Lead (300-Mil) SSOP
48-Lead (240-Mil) TSSOP
Industrial
O48
O48
Z48
4.1
4.8
Industrial
Industrial
Document #: 38-00396-C
6
CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
Package Diagrams
48-Lead Shrunk Small Outline Package O48
48-Lead ThinShrunk SmallOutline Package Z48
7
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Copyright 2000, Texas Instruments Incorporated
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