PI74LPT646AS [PERICOM]
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.300 INCH, 1.27 MM PITCH, PLASTIC, SOIC-24;![PI74LPT646AS](http://pdffile.icpdf.com/pdf2/p00285/img/icpdf/PI74LPT652AQ_1709880_icpdf.jpg)
型号: | PI74LPT646AS |
厂家: | ![]() |
描述: | Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.300 INCH, 1.27 MM PITCH, PLASTIC, SOIC-24 光电二极管 逻辑集成电路 |
文件: | 总6页 (文件大小:71K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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PI74LPT646
PI74LPT652
Fast CMOS 3.3V 8-Bit
Registered Transceiver
Product Description
Product Features
Pericom Semiconductor’s PI74LPT series of logic circuits are pro-
duced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
• CompatiblewithLCX™andLVT™familiesofproducts
• Supports 5V tolerant mixed signal mode operation
– Input can be 3V or 5V
– Output can be 3V or connected to 5V bus
The PI74LPT646 and PI74LPT652 are designed with a bus
transceiver with 3-state D-type flip-flops and control circuitry
arrangedformultiplexedtransmissionofdatadirectlyfromthedata
bus or from the internal storage registers. The PI74LPT652 utilizes
GAB and GBA signals to control the transceiver functions. The
PI74LPT646 utilizes the enable control (G) and direction pins
(DIR) to control the transceiver functions. SAB and SBA control
pins are used to select either real-time or stored data transfer. The
circuitry used for select control will eliminate the typical decoding
glitch that occurs in a multiplexer during the transition between
real-time and stored data. A low input level selects real-time data
and a high selects stored data.
• Advanced low power CMOS operation
• Excellent output drive capability:
Balanced drives (24 mA sink and source)
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
–24-pin173-milwideplasticTSSOP(L)
–24-pin150-milwideplasticQSOP(Q)
–24-pin150-milwideplasticTQSOP(R)
–24-pin300-milwideplasticSOIC(S)
The PI74LPT646 and PI74LPT652 can be driven from either 3.3V
or 5.0V devices allowing this device to be used as a translator in a
mixed 3.3/5.0V system.
Logic Block Diagram
PI74LPT652 ONLY
GBA
GAB
PI74LPT646
ONLY
G
DIR
CPBA
SBA
CPAB
SAB
B REG
0D
1 OR 8 CHANNELS
C0
B0
A REG
0D
A0
C0
TO 7 OTHER CHANNELS
PS2064A 01/15/97
1
PI74LPT646
PI74LPT652
3.3V 8-BIT REGISTERED TRANSCEIVERS
PI74LPT646
PI74LPT652
Product Pin Description
Product Pin Configuration Product Pin Configuration
Pin Name
Description
CPAB
SAB
DIR
A0
CPAB
SAB
GAB
A0
1
24
23
22
21
20
19
18
17
16
15
14
13
1
24
23
22
VCC
CPBA
SBA
G
VCC
A0-A7
Data Register A Inputs
Data Register B Outputs
2
2
CPBA
SBA
3
3
B0-B7
Data Register B Inputs
Data Register A Outputs
24-PIN
L24
Q24
R24
S24
24-PIN
L24
Q24
R24
S24
4
4
21 GBA
A1
A1
B0
B0
B1
B2
B3
B4
B5
B6
B7
5
5
20
19
18
17
16
15
14
13
CPAB, CPBA Clock Pulse Inputs
A2
A2
B1
6
6
A3
A3
SAB, SBA
DIR, G
GAB, GBA
GND
Output Data Source Select Inputs
B2
7
7
A4
A4
B3
8
8
Output Enable Inputs (LPT646)
Output Enable Inputs (LPT652)
Ground
A5
A5
B4
9
9
A6
A6
B5
10
11
12
10
11
12
A7
A7
B6
GND
GND
VCC
Power
B7
PI74LPT646 Truth Table
Inputs
DATA I/O(2)
Function/Operation
G
DIR
CPAB CPBA
SAB
SBA
A0-A7 B0-B7
Isolation
Store A and B Data
H
H
X
X
H or L
H or L
X
X
X
X
Input
Output
Input
Input
↑
↑
Real Time B Data to A Bus
Stored B Data to A Bus
L
L
L
L
X
X
X
H or L
X
X
L
H
Input
Real Time A Data to B Bus
Stored A Data to B Bus
L
L
H
H
X
H or L
X
X
L
H
X
X
Output
PI74LPT652 Truth Table
Inputs
DATA I/O(2)
Function/Operation
GAB
GBA
CPAB CPBA
SAB
SBA
A0-A7
B0-B7
Isolation
Store A and B Data
L
L
H
H
H or L
H or L
X
X
X
X
Input
Input
↑
↑
Store A, Hold B
Store A in Both Registers
X
H
H
H
↑
↑
H or L
X
X
X
Input
Input
Unspecified(1)
Output
↑
X(2)
Hold A, Store B
Store B in Both Registers
L
L
X
L
H or L
↑
↑
X
X
X
Unspecified(1)
Output
Input
Input
↑
X(2)
Real Time B Data to A Bus
Stored B Data to A Bus
L
L
L
L
X
X
X
H or L
X
X
L
H
Output
Input
Output
Output
Real Time A Data to B Bus
Stored A Data to B Bus
H
H
H
H
X
H or L
X
X
L
H
X
X
Input
Stored A Data to B Bus and
Stored B Data to A Bus
H
L
H or L
H or L
H
H
Output
Notes:
1. The data output functions may be enabled or disabled by various signals at the GAB or GBA inputs. Data
input functions are always enabled, i.e., data at the bus pins will be stored on every low-to-high transition
on the clock inputs.
2. Select control = L: clocks can occur simultaneously.
Select control = H: clocks must be staggered in order to load both registers.
H = High Voltage Level; L = Low Voltage Level; X = Don't Care; ↑ = LOW-to-HIGH transition
PS2064A 01/15/97
2
PI74LPT646
PI74LPT652
3.3V 8-BIT REGISTERED TRANSCEIVERS
REAL-TIME TRANSFER
BUS A TO B
REAL-TIME TRANSFER
BUS B TO A
BUS
A
BUS
B
BUS
A
BUS
B
LPT646 DIR
G
CPAB CPBA SAB
SBA
LPT646 DIR
G
CPAB CPBA SAB
SBA
L
L
X
X
X
L
H
L
X
X
L
X
LPT652 GAB GBA CPAB CPBA SAB
SBA
LPT652 GAB GBA CPAB CPBA SAB
SBA
L
L
X
X
X
L
H
H
X
X
L
X
STORAGE FROM
A AND/OR B
TRANSFER STORES
DATA TO A AND/OR B
BUS
BUS
BUS
A
BUS
B
A
B
LPT646 DIR
G
L
L
CPAB CPBA SAB
SBA
X
X
LPT646(1) DIR
G
L
L
CPAB CPBA SAB
SBA
H
X
H
L
X
↑
X
↑
X
↑
↑
X
X
X
L
H
X
H or L
H or L
X
X
H
H
X
LPT652 GAB GBA CPAB CPBA SAB
H or L H or L
SBA
H
LPT652 GAB GBA CPAB CPBA SAB
SBA
X
X
H
L
H
X
L
L
H
X
H
↑
X
↑
X
↑
↑
X
X
X
1. Note: The LPT646 cannot transfer data to
A bus and B bus simultaneously.
X
PS2064A 01/15/97
3
PI74LPT646
PI74LPT652
3.3V 8-BIT REGISTERED TRANSCEIVERS
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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
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
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
sectionsofthisspecificationisnotimplied. Exposure
to absolute 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)
–0.7
–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.
VIN = VIH or VIL
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
VOL
Output LOW Voltage
—
V
V
V
mA
µA
mV
0.2
0.3
–85
—
IOS
IOFF
VH
Short Circuit Current(4)
Power Down Disable
Input Hysteresis
VCC = Max.(3), VOUT = GND
VCC = 0V, VIN or VOUT ≤ 4.5V
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.
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.
PS2064A 01/15/97
4
PI74LPT646
PI74LPT652
3.3V 8-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
VIN = GND
MHz
G = DIR = GND
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
G = DIR = GND
One Bit Toggling
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
VIN = VCC – 0.6V
VIN = GND
2.1
4.7(5)
50% Duty Cycle
G = DIR = GND
8 Bits Toggling
Notes:
1. ForMax. 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.
PS2064A 01/15/97
5
PI74LPT646
PI74LPT652
3.3V 8-BIT REGISTERED TRANSCEIVERS
PI74LPT646 Switching Characteristics over Operating Range(1)
LPT646
Com.
LPT646A
Com.
LPT646C
Com.
Parameters Description
Conditions(2)
Min.(3)
Max.
Min.(3)
Max.
Min.(3)
Max.
Units
tPLH
tPHL
Propagation Delay
Bus to Bus
CL = 50pF
RL = 500Ω
2.0
2.0
2.0
2.0
2.0
4.0
2.0
6.0
7.5
2.0
2.0
2.0
2.0
2.0
2.0
1.5
5.0
6.3
1.5
1.5
1.5
1.5
1.5
2.0
1.5
5.0
5.4
ns
tPZH
tPZL
Output Enable Time
G, DIR to Bus
Output Disable Time(3)
14.0
9.0
9.0
9.5
—
9.8
6.3
6.3
7.7
—
7.8
6.3
5.7
6.2
—
ns
ns
ns
ns
ns
ns
ns
tPHZ
tPLZ
G, DIR to Bus
tPLH
tPHL
Propagation Delay
Clock to Bus
tPLH
tPHL
Propagation Delay
SBA or SAB to Bus
tSU
Setup Time HIGH or
LOW, BUS to Clock
tH
Hold Time HIGH or
LOW, Bus to Clock
Clock Pulse Width(3)
HIGH or LOW
—
—
—
tW
—
—
—
PI74LPT652 Switching Characteristics over Operating Range(1)
LPT652
Com.
LPT652A
Com.
LPT652C
Com.
Min.(3)
Parameters Description
Conditions(2)
Min.(3)
Max.
Min.(3)
Max.
Max.
Units
tPLH
tPHL
Propagation Delay
Bus to Bus
CL = 50pF
RL = 500Ω
2.0
7.5
2.0
2.0
2.0
2.0
2.0
2.0
1.5
5.0
6.3
1.5
1.5
1.5
1.5
1.5
2.0
1.5
5.0
5.4
ns
tPZH
tPZL
Output Enable Time
GBA, GAB to Bus
Output Disable Time(3)
GBA, GAB to Bus
2.0
2.0
2.0
2.0
4.0
2.0
6.0
14.0
9.0
9.0
9.5
—
9.8
6.3
6.3
7.7
—
7.8
6.3
5.7
6.2
—
ns
ns
ns
ns
ns
ns
ns
tPHZ
tPLZ
tPLH
tPHL
Propagation Delay
Clock to Bus
tPLH
tPHL
Propagation Delay
SBA or SAB to Bus
tSU
Setup Time HIGH or
LOW, BUS to Clock
tH
Hold Time HIGH or
LOW, Bus to Clock
Clock Pulse Width(3)
—
—
—
tW
—
—
—
HIGH or LOW
Notes:
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%.
2. See test circuit and waveforms.
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS2064A 01/15/97
6
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PI74LPT646ASX
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.300 INCH, 1.27 MM PITCH, PLASTIC, SOIC-24
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Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.173 INCH, 1.10 MM HEIGHT, 0.65 MM PITCH, PLASTIC, TSSOP-24
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PI74LPT646CQ
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.150 INCH, 0.635 MM PITCH, PLASTIC, QSOP-24
PERICOM
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PI74LPT646CQX
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.150 INCH, 0.635 MM PITCH, PLASTIC, QSOP-24
PERICOM
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PI74LPT646CRX
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.150 INCH, 1.10 MM HEIGHT, 0.635 MM PITCH, PLASTIC, TQSOP-24
PERICOM
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PI74LPT646CS
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.300 INCH, 1.27 MM PITCH, PLASTIC, SOIC-24
PERICOM
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PI74LPT646CSX
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.300 INCH, 1.27 MM PITCH, PLASTIC, SOIC-24
PERICOM
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PI74LPT646L
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.173 INCH, 1.10 MM HEIGHT, 0.65 MM PITCH, PLASTIC, TSSOP-24
PERICOM
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PI74LPT646QX
Registered Bus Transceiver, LPT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO24, 0.150 INCH, 0.635 MM PITCH, PLASTIC, QSOP-24
PERICOM
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