74FCT162952ETPACT [TI]
16-Bit Registered Transceivers; 16位寄存收发器
| 型号： | 74FCT162952ETPACT |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 16-Bit Registered Transceivers |
| 文件： | 总8页 (文件大小：70K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1CY74FCT162H952
T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
SCCS065A - August 1994 - Revised March 2000
16-Bit Registered Transceivers
• Eliminates the need for external pull-up or pull-down
Features
resistors
• FCT-E speed at 3.7 ns
• Power-off disable outputs permits live insertion
Functional Description
• Edge-rate control circuitry for significantly improved
These 16-bit registered transceivers are high-speed,
low-power devices. 16-bit operation is achieved by connecting
the control lines of the two 8-bit registered transceivers
together. For data flow from bus A-to-B, CEAB must be LOW
to allow data to be stored when CLKAB transitions from
LOW-to-HIGH. The stored data will be present on the output
when OEAB is LOW. Control of data from B-to-A is similar and
is controlled by using the CEBA, CLKBA, and OEBA inputs.
The output buffers are designed with a power-off disable
feature to allow for live insertion of boards.
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%
CY74FCT16952T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) <1.0V at
VCC = 5V, TA = 25˚C
The CY74FCT16952T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162952T has 24-mA balanced output drivers
with current-limiting resistors in the outputs. This reduces the
need for external terminating resistors and provides for
minimal undershoot and reduced ground bounce. The
CY74FCT162952T is ideal for driving transmission lines.
CY74FCT162952T Features:
• Balanced 24 mA output drivers
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at
The CY74FCT162H952T 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.
VCC = 5V, TA= 25˚C
CY74FCT162H952T Features:
• Bus hold retains last active state
Pin Configuration
LogicBlock Diagrams
SSOP/TSSOP
Top View
OEAB
1
2
56
55
OEBA
CLKBA
1
1
1
CEBA
CEBA
2
1
CLKAB
CEAB
1
CEBA
3
4
54
53
1
1
CLKBA
OEAB
CLKBA
OEAB
1
2
GND
A
GND
B
1
2
2
5
6
7
52
51
50
1
1
1
1
CEAB
CEAB
1
B
2
A
1
1
2
V
V
CC
CC
A
CLKAB
OEBA
CLKAB
OEBA
2
1
2
B
3
8
9
49
48
1
3
1
A
B
4
1
1
4
1
B
5
A
5
10
11
12
13
14
15
16
17
18
19
20
21
22
23
47
46
45
44
43
42
41
40
39
38
37
36
35
34
1
C
C
1
A
A
2 1
CE
D
CE
D
GND
B
1
1
GND
A
B
B
2
1
1
1
1
1
6
1
1
6
C
CE
D
C
CE
D
A
7
B
7
A
B
1 8
1
8
A
B
2 1
2
1
B
A
2
2
2
2
2
B
3
A
FCT16952–1
FCT16952–2
2
3
GND
A
GND
B
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
2
4
2
4
A
5
B
2 5
2
B
A
2
6
2
6
V
CC
V
CC
B
7
A
2
2
2
7
B
8
A
24
25
26
27
28
33
32
31
30
29
2
8
GND
CEAB
GND
CEBA
2
2
CLKAB
CLKBA
OEBA
2
2
2
OEAB
2
FCT16952–3
Copyright © 2000, Texas Instruments Incorporated
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Maximum Ratings[5, 6]
Pin Description
Name
Description
(Above which the useful life may be impaired. For user
guidelines, not tested.)
OEAB
OEBA
CEAB
CEBA
CLKAB
CLKBA
A
A-to-B Output Enable Input (Active LOW)
B-to-A Output Enable Input (Active LOW)
A-to-B Clock Enable Input (Active LOW)
B-to-A Clock Enable Input (Active LOW)
A-to-B Clock Input
Storage Temperature ................................. –55°C to +125°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
DC Input Voltage ........................................... –0.5V to +7.0V
DC Output Voltage......................................... –0.5V to +7.0V
B-to-A Clock Input
DC Output Current
(Maximum Sink Current/Pin) ........................–60 to +120 mA
A-to-B Data Inputs or B-to-A Three-State
Outputs[1]
Power Dissipation..........................................................1.0W
B
B-to-A Data Inputs or A-to-B Three-State
Outputs[1]
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Function Table[2, 3]
For A-to-B (Symmetric with B-to-A)
Inputs
Operating Range
Outputs
Ambient
Range
Industrial
Temperature
VCC
CEAB
CLKAB
OEAB
A
X
X
L
B
B[4]
B[4]
L
–40°C to +85°C
5V ± 10%
H
X
L
X
L
L
L
L
L
H
L
H
X
H
X
X
Z
Notes:
1. On the CY74FCT162H952T these pins have bus hold.
2. A-to-B data flow is shown: B-to-A data flow is similar but uses, CEBA, CLKBA, and OEBA.
3. H = HIGH Voltage Level.
L = LOW Voltage Level.
X = Don’t Care.
= LOW-to-HIGH Transition.
Z = HIGH Impedance.
4. Level of B before the indicated steady-state input conditions were established.
5. 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.
6. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.
2
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Electrical Characteristics Over the Operating Range
Parameter
VIH
Description
Input HIGH Voltage
Test Conditions
Min.
Typ.[7]
Max.
Unit
V
2.0
VIL
VH
VIK
IIH
Input LOW Voltage
Input Hysteresis[8]
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
µA
mA
±100
IBBH
IBBL
Bus Hold Sustain Current on Bus Hold Input[9] VCC=Min. VI=2.0V
–50
+50
VI=0.8V
IBHHO
IBHLO
Bus Hold Overdrive Current on Bus Hold Input[9] VCC=Max., VI=1.5V
TBD
±1
IOZH
High Impedance Output Current (Three-State VCC=Max., VOUT=2.7V
Output pins)
µA
µA
IOZL
High Impedance Output Current (Three-State VCC=Max., VOUT=0.5V
Output pins)
±1
IOS
IO
Short Circuit Current[10]
Output Drive Current[10]
Power-Off Disable
VCC=Max., VOUT=GND
VCC=Max., VOUT=2.5V
VCC=0V, VOUT≤4.5V[11]
–80
–50
–140
–200
–180
±1
mA
mA
µA
IOFF
Output Drive Characteristics for CY74FCT16952T
Parameter
Description
Test Conditions
VCC=Min., IOH= –3 mA
Min.
2.5
Typ.[7]
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 CY74FCT162952T, CY74FCT162H952T
Parameter
IODL
Description
Output LOW Current[10]
Output HIGH Current[10]
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.[7]
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
Capacitance[8] (TA = +25˚C, f = 1.0 MHz)
Parameter
Description
Input Capacitance
Output Capacitance
Test Conditions
Typ.[7] Max.
Unit
pF
CIN
VIN = 0V
4.5
5.5
6.0
8.0
COUT
VOUT = 0V
pF
Note:
7. Typical values are at VCC= 5.0V, TA= +25˚C ambient.
8. This parameter is specified but not tested.
9. Pins with bus hold are described in the Pin Description.
10. 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.
11. Tested at +25˚C.
3
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Power Supply Characteristics
Parameter
Description
Test Conditions[12]
VIN<0.2V
Typ.[7]
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[13]
0.5
75
1.5
mA
ICCD
Dynamic Power Supply
Current[14]
VCC=Max., One Input Toggling, VIN=VCC or
50% Duty Cycle, Outputs Open, VIN=GND
OEAB or OEBA=GND
120
µA/MHz
IC
Total Power Supply Current[15] VCC=Max., F1=5 MHz,
F0 = 10 MHz (CLKAB)
VIN=VCC or
VIN=GND
0.8
1.3
1.7
3.2
mA
OEAB = CEAB = GND
OEBA = VCC 50% Duty Cycle,
Outputs Open, One Bit Toggling
VIN=3.4V or
VIN=GND
VCC=Max., f0=10 MHz (CLKAB) VIN=VCC or
3.8
8.3
6.5[16]
f1=2.5 MHz,
VIN=GND
OEAB = CEAB = GND
OEBA = VCC 50% Duty Cycle,
Outputs Open,
VIN=3.4V or
VIN=GND
20.0[16]
Sixteen Bit Toggling
Notes:
12. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
13. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
14. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
15. 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.
16. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.
4
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Switching Characteristics Over the Operating Range[17]
CY74FCT16952AT
CY74FCT162952AT
CY74FCT162H952AT
CY74FCT162952BT
Parameter
Description
Propagation Delay
CLKAB, CLKBA to B, A
Min.
Max.
Min.
Max.
Unit
Fig. No.[18]
tPLH
tPHL
2.0
10.0
2.0
7.5
ns
1, 5
tPZH
tPZL
Output Enable Time
OEBA, OEAB to A, B
1.5
1.5
2.5
2.0
3.0
2.0
3.0
—
10.5
10.0
—
1.5
1.5
2.5
1.5
3.0
2.0
3.0
—
8.0
7.5
—
ns
ns
ns
ns
ns
ns
ns
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
OEBA, OEAB to A, B
1, 7, 8
tSU
tH
tSU
tH
Set-Up Time, HIGH or LOW
A, B to CLKAB, CLKBA
4
4
Hold Time, HIGH or LOW
A, B to CLKAB, CLKBA
—
—
Set-Up Time, HIGH or LOW
CEAB, CEBA to CLKAB, CLKBA
—
—
4
Hold Time, HIGH or LOW
CEAB, CEBA to CLKAB, CLKBA
—
—
4
tW
Pulse Width HIGH or LOW
CLKAB or CLKBA[19]
Output Skew[20]
—
—
5
tSK(O)
0.5
0.5
—
CY74FCT16952ET
CY74FCT162952ET
CY74FCT162H952ET
CY74FCT16952CT
CY74FCT162H952CT
Parameter
Description
Min.
Max.
Min.
Max.
Unit
Fig. No.[18]
tPLH
tPHL
Propagation Delay
CLKAB, CLKBA to B, A
2.0
6.3
1.5
3.7
ns
1, 5
tPZH
tPZL
Output Enable Time
OEBA, OEAB to A, B
1.5
1.5
2.5
1.5
3.0
2.0
3.0
—
7.0
6.5
—
1.5
1.5
1.5
0
4.4
3.6
—
ns
ns
ns
ns
ns
ns
ns
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
OEBA, OEAB to A, B
1, 7, 8
tSU
tH
tSU
tH
Set-Up Time, HIGH or LOW
A, B to CLKAB, CLKBA
4
4
Hold Time, HIGH or LOW
A, B to CLKAB, CLKBA
—
—
Set-Up Time, HIGH or LOW
CEAB, CEBA to CLKAB, CLKBA
—
2.0
0
—
4
Hold Time, HIGH or LOW
CEAB, CEBA to CLKAB, CLKBA
—
—
4
tW
Pulse Width HIGH or LOW
CLKAB or CLKBA[19]
Output Skew[20]
—
3.0
—
—
5
tSK(O)
0.5
0.5
—
Notes:
17. Minimum limits are specified but not tested on Propagation Delays.
18. See “Parameter Measurement Information” in the General Information section.
19. This parameter is specified but not tested.
20. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.
5
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Ordering Information CY74FCT16952
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
Package Type
56-Lead (300-Mil) SSOP
3.7
CY74FCT16952ETPVC/PVCT
CY74FCT16952CTPACT
O56
Z56
O56
Industrial
Industrial
Industrial
6.3
56-Lead (240-Mil) TSSOP
56-Lead (300-Mil) SSOP
10.0
CY74FCT16952ATPVC/PVCT
Ordering Information CY74FCT162952
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
74FCT162952ETPACT
CY74FCT162952ETPVC
74FCT162952ETPVCT
CY74FCT162952BTPVC
74FCT162952BTPVCT
74FCT162952ATPACT
Package Type
3.7
Z56
O56
O56
O56
O56
Z56
56-Lead (240-Mil) TSSOP
56-Lead (300-Mil) SSOP
56-Lead (300-Mil) SSOP
56-Lead (300-Mil) SSOP
56-Lead (300-Mil) SSOP
56-Lead (240-Mil) TSSOP
Industrial
7.5
Industrial
Industrial
10.0
Ordering Information CY74FCT162H952
Speed
(ns)
Package
Operating
Range
Ordering Code
74FCT162H952ETPACT
74FCT162H952CTPVC/PVCT
74FCT162H952ATPACT
Name
Package Type
3.7
6.3
Z56
56-Lead (240-Mil) TSSOP
56-Lead (300-Mil) SSOP
56-Lead (240-Mil) TSSOP
Industrial
Industrial
Industrial
O56
Z56
10.0
6
CY74FCT16952T
CY74FCT162952T
CY74FCT162H952T
Package Diagrams
56-Lead Shrunk Small Outline Package O56
56-Lead Thin Shrunk Small Outline Package Z56
7
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
Customers are responsible for their applications using TI components.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 2000, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明