PI74LCX16952A [ETC]
Dual 8-bit Bus Transceiver ; 双8位总线收发器\n
| 型号： | PI74LCX16952A |
| 厂家： | 
ETC |
| 描述： | Dual 8-bit Bus Transceiver
|
| 文件： | 总5页 (文件大小：183K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI74LCX16952
Fast CMOS 3.3V 16-Bit
16-Bit Registered Transceivers
Product Description
Product Features
Pericom Semiconductors PI74LCX series of logic circuits are
produced using the Companys advanced 0.6 micron CMOS
technology, achieving industry leading speed grades.
FunctionallycompatiblewithFCT3,LVT,and74
series 16952 families of products
Tri-State outputs
ThePI74LCX16952isa16-bitregisteredtransceiversorganizedwith
two sets of eight D-type latches with separate input and output
controls for each set. For data flow from A to B, for example, the A-
to-B Enable (xCEAB) input must be LOW in order to enter data
from xAx. The data present on the A port will be clocked on the B
registerwhenxCLKABtogglesfromLOW-to-HIGH. ThexOEAB
control performs the output enable function on the B port. Control
of data from B to A is similar, but uses the xCEAB, xCLKAB, and
xOEABinputs.Byconnectingthecontrolpinsofthetwoindependent
transceivers together, a full 16-bit operation can be achieved. The
outputbuffersaredesignedwithaPower-Offdisableallowing"live
insertion" of boards when used as backplane drivers.
5V Tolerant inputs and outputs
2.0V-3.6V VCC supply operation
Balanced sink and source output drives (24 mA)
Low ground bounce outputs
Supports live insertion
ESD Protection exceeds 2000V, Human Body Model
200V, Machine Model
Packages available:
56-pin240-milwideplasticTSSOP(A)
56-pin300-milwideplasticSSOP(V)
ThePI74LCX16952canbedrivenfromeither3.3Vor5.0Vdevices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
Logic Block Diagram
1
OEBA
2OEBA
1
CEBA
2CEBA
1
CLKBA
OEAB
CEAB
2
CLKBA
OEAB
CEAB
1
2
1
2
1
CLKAB
2CLKAB
C
C
1
A0
2A0
1
B0
2B0
D
D
C
C
D
D
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
PS2096A 02/12/97
1
PI74LCX16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Truth Table(1,2)
Product Pin Description
Pin Name Description
Inputs
Outputs
xBx
B(3)
xCEAB xCLKAB xOEAB
xAx
X
xOEAB
OEBA
CEAB
xCEBA
A-to-B Output Enable Input (Active LOW)
H
X
L
X
L
↑
L
L
L
L
H
X
B-to-A Output Enable Input (Active LOW)
A-to-B Clock Enable Input (Active LOW)
B-to-A Clock Enable Input (Active LOW)
X
B(3)
X
L
L
L
H
H
XCLKAB A-to-B Clock Input
↑
X
X
X
High-Z
XCLKBA B-to-A Clock Input
XAX
A-to-B Data Inputs or B-to-A 3-State Outputs
Notes:
1. H = High Voltage Level
L = Low Voltage Level
XBX
B-to-A Data Inputs or B-to-A 3-State Outputs
X = Dont Care or Irrelevant
= LOW-to-HIGH Transition
Z = High Impedance
GND
Ground
Power
↑
VCC
2. A-to-B data flow shown. B-to-A flow control
is the same, except using xCEBA, xCLKBA,
and xOEBA.
Product Pin Configuration
1OEAB
1CLKAB
1CEAB
GND
1A0
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1OEBA
1CLKBA
1CEBA
GND
1B0
3. Level of B before the indicated steady-state
input conditions were established.
2
3
4
5
1A1
1B1
6
VCC
1A2
VCC
1B2
7
8
1B3
1A3
9
1B4
1A4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GND
1B5
GND
1A5
56-PIN
V56
A56
1A6
1B6
1B7
1A7
2B0
2A0
2B1
2A1
2B2
2A2
GND
2A3
GND
2B3
2B4
2A4
2B5
2A5
VCC
VCC
2A6
2A7
2B6
2B7
GND
GND
2CEBA
2CLKBA
2OEBA
2CEAB
2CLKAB
2OEAB
PS2096A 02/12/97
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PI74LCX16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Storage Temperature.............................................................. 65°C to +150°C
Ambient Temperature with Power Applied............................. 40°C to +85°C
Supply Voltage to Ground Potential (Inputs & Vcc Only)....... 0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ... 0.5V to +7.0V
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational
DC Input Voltage ..................................................................... 0.5V to +7.0V sections of this specification is not implied. Exposure
to absolute maximum rating conditions for
DC Output Current ............................................................................... 120 mA
extended periods may affect reliability.
Power Dissipation ..................................................................................... 1.0W
Recommended Operating Conditions
Symbol
Parameter
Min.
2.0
1.5
0
Max.
3.6
Units
VCC
Supply Voltage
Operating
Data Retention
3.6
VI
Input Voltage
5.5
V
V
O
Output Voltage
HIGH or LOW State
TRI-State
0
V
CC
0
5.5
±24
±12
+85
10
I
OH/IOL
Output Current
V
CC = 3.0V-3.6V
CC = 2.7V
mA
V
TA
Free-Air Operating Temperature
Input Edge Rate
−40
°C
V = 0.8V-2.0V, VCC = 3.0V
0
ns/V
∆t/∆V
PS2096A 02/12/97
3
PI74LCX16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
DC Electrical Characteristics (Over the Operating Range, TA = −40°C to +85°C, VCC = 2.7V to 3.6V)
Parameters Description
Test Conditions(1)
Min.
2.0
Typ(2)
—
Max.
—
Units
V
IH
IL
OH
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
—
—
0.8
—
V
V
V
V
CC = 2.7-3.6
I
I
I
I
I
I
I
I
OH = –0.1mA
OH = –12mA
OH = –18mA
OH = –24mA
OL = 0.1mA
OL = 12mA
OL = 16mA
OL = 24mA
V
CC-0.2
2.2
2.4
2.2
—
—
CC = 2.7
—
—
CC = 3.0
—
—
—
—
V
VOL
Output LOW Voltage
V
V
V
CC = 2.7-3.6
—
0.2
0.4
0.4
0.55
−1.2
±5
CC = 2.7
—
—
CC = 3.0
—
—
—
—
V
IK
Clamp Diode Voltage
Input Leakage Current
Tri-State Output Leakage
VCC = Min., IIN = –18mA
—
−0.7
—
I
I
0 ≤ V
I
≤ 5.5V
≤ 5.5V
Vcc = 2.7-3.6
CC = 2.7-3.6
—
IOZ
0 ≤ V
O
V
—
—
±5
V
V
V
I
= VIH or VIL
I
OFF
Power Down Disable
CC = 0V, VIN or VOUT ≤ 5.5V
—
—
10
10
µA
I
CC
Quiescent Power Supply
Current
CC = Max.
CC = Max.
V
IN = GND or VCC
IN = VCC – 0.6V(3)
0.1
Quiescent Power Supply
Current
V
V
500
∆
ICC
TTL Inputs HIGH
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 3.3V, +25°C ambient.
3. Per TTL driven input; all other inputs at VCC or GND.
Capacitance
Parameters Description
Test Conditions
Typ.
7
Units
C
IN
OUT
PD
Input Capacitance
V
V
V
CC = Open, V
CC = 3.3V, V
CC = 3.3V, V
I
= 0V or VCC
C
Output Capacitance
I
= 0V or VCC
8
pF
C
Power Dissipation Capacitance
I
= 0V or VCC, F = 10 MHz
20
PS2096A 02/12/97
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PI74LCX16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Switching Characteristics over Operating Range
V
CC = 3.3V ± 0.3V
V
Min.
2.0
CC = 2.7V
Parameters Description
Conditions
Min.
Max.
Max.
Units
t
t
PLH
PHL
Propagation Delay
xCLKAB, xCLKBA to xBx, xAx
C
L
= 50pF
= 500Ω
2.0
6.3
7.6
8.4
7.8
RL
tPZH
Output Enable Time
1.5
1.5
2.5
2.0
3.0
7.0
6.5
1.5
1.5
2.5
2.0
3.0
tPZL
xOEAB, xOEBA to xAx, xBx
tPHZ
Output Disable Time
tPLZ
xOEAB, xOEBA to xAx, xBx
tsu
Setup Time HIGH or LOW
xAx, xBx to xCLKAB, xCLKB
tH
Hold Time HIGH or LOW,
xAx, xBx to xCLKAB, xCLKBA
ns
tSU
Setup Time HIGH or LOW
xCEAB, xCEBA to
xCLKAB, xCLKBA
t
H
Hold Time HIGH or LOW,
xCEAB, xCEBA to
xCLKAB, xCLKBA
2.0
3.0
2.0
3.0
tW
Pulse Width HIGH or LOW
xCLKAB or CLKBA
tSK(O)
Output Skew(1)
1.0
Note:
1. Skew between any two outputs, of the same package, switching in the same direction.
Dynamic Switching Characteristics (TA = +25°C)
Parameters
Description
Test Conditions(1)
Typ.
Units
VOLP
Dynamic LOW Peak Voltage
V
CC = 3.3V, C
L
= 50pF
V
IH = 3.3V, VIL = 0V
0.8
V
VOLV
Dynamic LOW Valley Voltage
VCC = 3.3V, C = 50pF
L
VIH = 3.3V, VIL = 0V
Note:
1. Measured with n1 outputs switching from High-to-Low or Low-to-High. The remaining output is measured in the LOW state.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS2096A 02/12/97
5
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