PI74LPT16952CV [PERICOM]
Registered Bus Transceiver, LPT Series, 2-Func, 8-Bit, True Output, CMOS, PDSO56, 0.300 INCH, 0.635 MM PITCH, PLASTIC, SSOP-56;
| 型号： | PI74LPT16952CV |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | Registered Bus Transceiver, LPT Series, 2-Func, 8-Bit, True Output, CMOS, PDSO56, 0.300 INCH, 0.635 MM PITCH, PLASTIC, SSOP-56 光电二极管 |
| 文件： | 总5页 (文件大小：57K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI74LPT16952
Fast CMOS 3.3V 16-Bit Registered Transceivers
1
2
Product Features
Product Description
• CompatiblewithLCX™andLVT™familiesofproducts
Pericom Semiconductor’s PI74LPT series of logic circuits are
producedintheCompany’sadvanced0.6micronCMOStechnology,
achieving industry leading speed grades.
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
3
– Output can be 3V or connected to 5V bus
The PI74LPT16952 is a 16-bit registered transceivers organized
with 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 to enter data from xAx.
ThedatapresentontheAportwillbeclockedontheBregisterwhen
xCLKAB toggles from LOW-to-HIGH. The xOEAB 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 xOEAB
inputs. By connecting the control pins of the two independent
transceivers together, a full 16-bit operation can be achieved. The
outputbuffersaredesignedwithaPower-Offdisableallowing“live
insertion” of boards when used as backplane drivers.
• Advanced Low Power CMOS Operation
• Excellent output drive capability:
Balanced drives (24 mA sink and source)
4
5
• Pin compatible with industry standard double-density
pinouts
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Multiple center pins and distributed Vcc/GND pins
minimize switching noise
6
ThePI74LPT16952canbedrivenfromeither3.3Vor5.0Vdevices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
• Packages available:
–56-pin240milwideplasticTSSOP(A)
–56-pin300milwideplasticSSOP(V)
7
8
Logic Block Diagram
1
OEBA
2OEBA
9
1
CEBA
2CEBA
10
11
12
13
14
15
1
CLKBA
OEAB
CEAB
2
CLKBA
OEAB
CEAB
1
2
1
2
1CLKAB
2CLKAB
C
C
1A0
2A0
1B0
2B0
D
D
C
C
D
D
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
PS2076A 02/4/97
1
PI74LPT16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Truth Table(1,2)
Product Pin Description
Pin Name
xOEAB
xOEBA
xCEAB
xCEBA
xCLKAB
xCLKBA
xAx
Description
Inputs
XCLKAB
Outputs
XBX
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
XCEAB
XOEAB
XAX
X
H
X
X
L
L
L
B(3)
B(3)
X
L
L
X
↑
↑
L
L
H
L
H
X
L
H
B-to-A Clock Input
X
High Z
A-to-B Data Inputs or B-to-A 3-State Outputs
B-to-A Data Inputs or B-to-A 3-State Outputs
Ground
Notes:
xBx
1. H = High Voltage Level
L = Low Voltage Level
GND
X = Don't Care or Irrelevant
↑ = LOW-to-HIGH Transition
Z = High Impedance
VCC
Power
2. A-to-B data flow shown. B-to-A flow control
is the same, except using xCEBA, xCLKBA,
and xOEBA.
3. Level of B before the indicated steady-state
input conditions were established.
Product Pin Configuration
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
1OEAB
1CLKAB
1CEAB
GND
1A0
1OEBA
1CLKBA
1CEBA
GND
1B0
2
3
4
5
1A1
1B1
6
VCC
1A2
VCC
1B2
7
8
1A3
1B3
9
1A4
1B4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GND
1A5
GND
1B5
1A6
1B6
1A7
1B7
56-PIN
V56
A56
2A0
2B0
2A1
2B1
2A2
2B2
GND
2A3
GND
2B3
2A4
2B4
2A5
2B5
VCC
VCC
2A6
2A7
2B6
2B7
GND
GND
2CEAB
2CLKAB
2OEAB
2CEBA
2CLKBA
2OEBA
PS2076A 02/4/97
2
PI74LPT16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature............................................................. –55°C to +125°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
DC Input Voltage .................................................................... –0.5V to +7.0V
DC Output Current .............................................................................. 120 mA
Power Dissipation .....................................................................................1.0W
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional opera-
tion of the device at these or any other conditions
above those indicated in the operational sections of
thisspecificationisnotimplied. Exposuretoabsolute
maximum rating conditions for extended periods
may affect reliability.
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. Typ(2) Max. Units
VIH
Input HIGH Voltage (Input pins)
Input HIGH Voltage (I/O pins)
Input LOW Voltage
Guaranteed Logic HIGH Level
2.2
2.0
–0.5
—
—
—
5.5
5.5
0.8
V
V
V
VIL
IIH
IIL
Guaranteed Logic LOW Level
(Input and I/O pins)
Input HIGH Current (Input pins)
Input HIGH Current (I/O pins)
Input LOW Current (Input pins)
Input LOW Current (I/O pins)
High Impedance Output Current
(3-State Output pins)
Clamp Diode Voltage
Output HIGH Current
Output LOW Current
Output HIGH Voltage
VCC = Max.
VIN = 5.5V
—
—
—
—
—
—
—
–36
50
—
—
—
—
—
±1
±1
±1
±1
±1
µA
µA
µA
µA
µA
µA
V
mA
mA
V
VCC = Max.
VIN = VCC
VCC = Max.
VCC = Max.
VCC = Max.
VCC = Max.
VIN = GND
VIN = GND
VOUT = 5.5V
VOUT = GND
IOZH
IOZL
VIK
IODH
IODL
VOH
—
±1
VCC = Min., IIN = –18 mA
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
–70
–60
90
–1.2
–110
200
—
VCC = Min.
IOH = –0.1 mA Vcc-0.2
—
VIN = VIH or VIL
VCC = 3.0V
VIN = VIH or VIL
VCC = Min.
IOH = –3 mA
IOH = –8 mA
IOH = –24 mA
IOL =0.1 mA
IOL = 16 mA
IOL = 24 mA
2.4
2.4(5)
2.0
—
—
—
–60
—
—
3.0
3.0
—
—
—
—
0.2
0.4
0.5
–240
±100
—
V
V
V
V
V
V
mA
µA
mV
VOL
Output LOW Voltage
—
VIN = VIH or VIL
0.2
0.3
–85
—
IOS
Short Circuit Current(4)
Power Down Disable
Input Hysteresis
VCC = Max.(3), VOUT = GND
VCC = 0V, VIN or VOUT ≤ 4.5V
IOFF
VH
150
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 and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
5. VOH = VCC – 0.6V at rated current.
PS2076A 02/4/97
3
PI74LPT16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power Supply Current
VCC = Max.
VCC = Max.
VIN = GND or VCC
VIN = VCC – 0.6V(3)
0.1
2.0
10
30
µA
µA
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
ICCD
Dynamic Power Supply(4)
VCC = Max.,
VIN = VCC
50
75
µA/
Outputs Open
XOE = GND
VIN = GND
MHz
One Bit Toggling
50% Duty Cycle
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
VIN = VCC – 0.6V
VIN = GND
0.6
2.3
mA
50% Duty Cycle
XOE = GND
One Bit Toggling
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = GND
VIN = VCC – 0.6V
VIN = GND
2.1
4.7(5)
16 Bits Toggling
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25°C ambient.
3. Per TTL driven input; all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. IC =IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = Power Supply Current for a TTL High Input
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)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
NCP = Number of Clock Inputs at fCP
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
PS2076A 02/4/97
4
PI74LPT16952
3.3V 16-BIT REGISTERED TRANSCEIVERS
Switching Characteristics over Operating Range(1)
LPT16952A
Com.
LPT16952B
Com.
LPT16952C
Com.
1
2
Parameters
Description
Conditions(2) Min.(3)
Max.
Min.(3)
Max.
Min.(3)
Max.
Units
t
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
SU
Propagation Delay
C
L
= 50 pF
= 500Ω
2.0
1.5
1.5
2.5
2.0
3.0
10.0
10.5
10.0
—
2.0
7.5
2.0
6.3
ns
X
CLKAB,
Output Enable Time
OEBA, OEAB to
Output Disable Time(4)
OEBA, OEAB to
X
CLKBA to
X
B
X
,
X
X
X
AX
R
L
1.5
1.5
2.5
2.0
3.0
8.0
7.5
—
1.5
1.5
2.5
2.0
3.0
7.0
6.5
—
ns
ns
ns
ns
ns
X
X
X
A
X,
X
B
B
3
X
X
X
A
X,
X
Set-up Time HIGH or LOW
xAx, xBx to xCLKAB, xCLKBA
Hold Time HIGH or LOW
xAx, xBx to xCLKAB, xCLKBA
Setup Time HIGH or LOW
xCEAB, xCEBA to
t
t
H
—
—
—
4
5
SU
—
—
—
xCLKAB, xCLKBA
t
H
Hold Time HIGH or LOW
xCEAB, xCEBA to
2.0
—
2.0
—
2.0
—
ns
xCLKAB, xCLKBA
Pulse Width HIGH(4) or
LOW, xCLKAB or xCLKBA
Output Skew(5)
3.0
—
—
3.0
—
—
3.0
—
—
ns
ns
6
t
t
W
SK(o)
0.5
0.5
0.5
Notes:
7
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V,
normal range. For Vcc = 2.7V, extended range, all Propagation Delays and
Enable/Disable times should be degraded by 20%.
8
2. See test circuit and wave forms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same
direction. This parameter is guaranteed by design.
9
10
11
12
13
14
15
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1)
Description
Test Conditions
Typ.
Max.
Units
CIN
Input Capacitance
Output Capacitance
VIN = 0V
4.5
5.5
6
8
pF
pF
COUT
VOUT = 0V
Note:
1. This parameter is determined by device characterization but is not production tested.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS2076A 02/4/97
5
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