74FCT162H245ATPVCT [TI]
16-bIT TRANSCEI; 16位TRANSCEI型号: | 74FCT162H245ATPVCT |
厂家: | TEXAS INSTRUMENTS |
描述: | 16-bIT TRANSCEI |
文件: | 总9页 (文件大小:72K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
1CY74FCT16445T/2
H245T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
SCCS026 - July 1994 - Revised March 2000
16-Bit Transceivers
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
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.
The output buffers are designed with power off disable capa-
bility to allow for live insertion of boards.
• Industrial temperature range of –40˚C to +85˚C
• VCC = 5V ± 10%
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.
CY74FCT16245T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce)<1.0V at VCC = 5V,
TA = 25˚C
CY74FCT162245T Features:
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.
• 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
Logic Block Diagrams CY74FCT16245T,CY74FCT162245T,
CY74FCT162H245T
Pin Configuration
SSOP/TSSOP
Top View
DIR
DIR
2
1
OE
OE
1
2
3
4
48
47
46
DIR
B
OE
1
2
1
1
1
1
A
1
1
1
1
2
A
A
1
1
1
2
B
A
2
GND
B
GND
A
45
44
43
42
41
B
B
B
B
1
1
2
2
1
5
6
7
8
9
1
1
3
4
1
3
A
A
2
1
1
2
2
2
B
A
4
1
V
CC
V
CC
1
2
2
16245T
162245T
B
A
5
1
1
5
6
1
1
A
3
A
3
162H245T
B
A
6
40
39
38
B
B
3
1
3
2
GND
GND
10
11
B
A
7
1
1
7
8
1
1
A
A
4
1
4
2
2
B
A
8
12
13
37
36
35
34
B
B
B
4
B
5
1
1
4
5
2
2
B
B
A
1
2
2
1
2
2
14
15
16
17
18
A
2
A
A
5
2
1
5
GND
GND
33
32
31
30
29
28
27
26
25
B
3
B
4
A
3
2
2
2
2
A
A
6
A
4
1
6
2
2
V
V
CC
CC
B
B
B
B
B
6
B
7
B
8
1
1
1
6
7
8
2
2
2
A
5
19
20
21
22
23
24
2
5
6
2
2
A
A
7
B
A
6
1
7
2
GND
B
GND
A
2
2
7
8
2
7
A
A
8
B
A
1
8
2
2
2
8
DIR
OE
2
FCT16245–3
FCT16245–1
FCT16245–2
Copyright © 2000, Texas Instruments Incorporated
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Maximum Ratings[3, 4]
Pin Description
(Above which the useful life may be impaired. For user
guidelines, not tested.)
Name
Description
OE
DIR
A
Three-State Output Enable Inputs (Active LOW)
Storage Temperature ........................Com’l -55°C to +125°C
Direction Control
Ambient Temperature with
Power Applied....................................Com’l -55°C to +125°C
Inputs or Three-State Outputs[1]
Inputs or Three-State Outputs[1]
DC Input Voltage ........................................... –0.5V to +7.0V
DC Output Voltage......................................... –0.5V to +7.0V
B
Function Table[2]
DC Output Current
(Maximum Sink Current/Pin) ........................–60 to +120 mA
Inputs
Power Dissipation..........................................................1.0W
OE
L
DIR
L
Outputs
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
L
H
Operating Range
H
X
Ambient
Range
Industrial
Temperature
VCC
–40°C to +85°C
5V ± 10%
Notes:
1. On CY74FCT162H245T these pins have bus hold.
2. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Impedance.
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
Description
Input HIGH Voltage
Test Conditions
Min.
Typ.[5]
Max.
Unit
V
VIH
VIL
VH
VIK
IIH
2.0
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
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Output Drive Characteristics for CY74FCT16245T
Parameter
Description
Test Conditions
VCC=Min., IOH=–3 mA
Min.
2.5
Typ.[5]
3.5
Max.
Unit
V
VOH
Output HIGH Voltage
VCC=Min., IOH=–15 mA
VCC=Min., IOH=–32 mA
VCC=Min., IOL=64 mA
2.4
3.5
V
2.0
3.0
V
VOL
Output LOW Voltage
0.2
0.55
V
Output Drive Characteristics for CY74FCT162245T, CY74FCT162H245T
Parameter
IODL
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]
115
Max.
150
Unit
mA
mA
V
IODH
–60
2.4
–115
3.3
–150
VOH
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.
Capacitance[6] (TA = +25˚C, f = 1.0 MHz)
Parameter
CIN
Description
Input Capacitance
Output Capacitance
Test Conditions
Typ.[5] Max.
Unit
pF
VIN = 0V
4.5
5.5
6.0
8.0
COUT
VOUT = 0V
pF
3
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Power Supply Characteristics
Parameter
Description
Test Conditions
VIN<0.2V,
Typ.[5]
Max.
Unit
ICC
Quiescent Power Supply Current VCC=Max.
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., One Input Toggling, VIN=VCC or
50% Duty Cycle, Outputs Open, VIN=GND
OE=DIR=GND
100
µA/MHz
IC
Total Power Supply Current[12]
VCC=Max., f1=10 MHz,
50% Duty Cycle, Outputs Open, VIN=GND
One Bit Toggling,
OE=DIR=GND
VIN=GND
VIN=VCC or
0.6
0.9
2.4
6.4
1.5
2.3
mA
mA
mA
mA
VIN=3.4V or
VCC=Max., f1=2.5 MHz, 50%
Duty Cycle, Outputs Open,
Sixteen Bits Toggling,
OE=DIR=GND
VIN=VCC or
VIN=GND
4.5[13]
16.5[13]
VIN=3.4V or
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
IC
= IQUIESCENT + IINPUTS + IDYNAMIC
= ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC = Quiescent Current with CMOS input levels
∆ICC = Power Supply Current for a TTL HIGH input (VIN=3.4V)
DH = Duty Cycle for TTL inputs HIGH
NT = Number of TTL inputs at DH
ICCD = Dynamic Current caused by an input transition pair (HLH or LHL)
f0
f1
= Clock frequency for registered devices, otherwise zero
= Input signal frequency
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
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
]
Switching Characteristics Over the Operating Range[14]
74FCT16245T
74FCT162245T
74FCT16245AT
74FCT162245AT
74FCT162H245AT
Fig.
Parameter
tPLH
tPHL
Description
Min.
Max.
Min.
Max.
Unit
No.[15]
Propagation Delay Data to Output
A to B, B to A
1.5
7.0
1.5
4.5
ns
1, 3
1, 7, 8
1, 7, 8
1, 7, 8
1, 7, 8
—
tPZH
tPZL
Output Enable Time
OE to A or B
1.5
1.5
1.5
1.5
9.5
7.5
9.5
7.5
0.5
1.5
1.5
1.5
1.5
6.2
5.0
6.2
5.0
0.5
ns
ns
ns
ns
ns
tPHZ
tPLZ
Output Disable Time
OE to A or B
tPZH
tPZL
Output Enable Time
DIR to A or B
tPHZ
tPLZ
Output Disable Time
DIR to A or B
Output Skew[16]
tSK(O)
74FCT16245CT
74FCT162245CT
74FCT162H245CT
74FCT16245ET
74FCT162245ET
74FCT162H245ET
Fig.
Parameter
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Description
Min.
Max.
Min.
Max.
Unit
No.[15]
Propagation Delay Data to Output
A to B, B to A
1.5
4.1
1.5
3.2
ns
1, 3
1, 7, 8
1, 7, 8
1, 7, 8
1, 7, 8
—
Output Enable Time
OE to A or B
1.5
1.5
1.5
1.5
5.8
4.8
5.8
4.8
0.5
1.5
1.5
1.5
1.5
4.4
4.0
4.8
4.0
0.5
ns
ns
ns
ns
ns
Output Disable Time
OE to A or B
Output Enable Time
DIR to A or B
Output Disable Time
DIR to A or B
Output Skew[16]
tSK(O)
Note:
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.
Ordering Information CY74FCT16245
Speed
(ns)
Package
Name
Operating
Range
Ordering Code
CY74FCT16245ETPACT
CY74FCT16245ETPVC/PVCT
CY74FCT16245CTPACT
CY74FCT16245CTPVC/PVCT
CY74FCT16245ATPACT
CY74FCT16245ATPVC/PVCT
CY74FCT16245TPACT
Package Type
48-Lead (240-Mil) TSSOP
3.2
4.1
4.5
7.0
Z48
O48
Z48
O48
Z48
O48
Z48
O48
Industrial
Industrial
Industrial
Industrial
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
CY74FCT16245TPVC/PVCT
5
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Ordering Information CY74FCT162245
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
74FCT162245ETPACT
CY74FCT162245ETPVC
74FCT162245ETPVCT
CY74FCT162245CTPACT
CY74FCT162245CTPVC
74FCT162245CTPVCT
74FCT162245ATPACT
CY74FCT162245ATPVC
74FCT162245ATPVCT
CY74FCT162245TPACT
CY74FCT162245TPVC/PVCT
Package Type
48-Lead (240-Mil) TSSOP
3.2
Z48
O48
O48
Z48
O48
O48
Z48
O48
O48
Z48
O48
Industrial
Industrial
Industrial
Industrial
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
4.1
4.5
7.0
Ordering Information CY74FCT162H245
Speed
(ns)
Package
Operating
Range
Ordering Code
74FCT162H245ETPACT
CY74FCT162H245ETPVC
74FCT162H245ETPVCT
74FCT162H245CTPACT
CY74FCT162H245CTPVC
74FCT162H245CTPVCT
74FCT162H245ATPACT
CY74FCT162H245ATPVC
74FCT162H245ATPVCT
Name
Package Type
3.2
4.1
4.5
Z48
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
Industrial
Industrial
Industrial
O48
O48
Z48
O48
O48
Z48
O48
O48
6
CY74FCT16245T/2245T
CY74FCT16445T/2H245T
Package Diagrams
48-Lead Shrunk Small Outline Package O48
7
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Package Diagrams
48-Lead Thin Shrunk Small Outline Package Z48
8
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Copyright 2000, Texas Instruments Incorporated
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