PI74LPT16646 [PERICOM]
Fast CMOS 3.3V 16-Bit Registered Transceivers; 快速CMOS 3.3V 16位寄存收发器
| 型号： | PI74LPT16646 |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | Fast CMOS 3.3V 16-Bit Registered Transceivers |
| 文件： | 总6页 (文件大小：75K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI74LPT16646
1
2
Fast CMOS 3.3V 16-Bit Registered Transceivers
Product Features
• CompatiblewithLCX™andLVT™familiesofproducts
Product Description
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.
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
3
– Output can be 3V or connected to 5V bus
The PI74LPT16646 is a 16-bit registered transceiver organized as
two independent 8-bit bus transceivers designed with 3-state
D-type flip-flops and control circuitry arranged for multiplexed
transmission of data directly from the data bus or from the internal
storage registers. Each 8-bit transceiver utilizes the enable control
(xOE)anddirectionpins(xDIR)tocontrolthetransceiverfunctions.
The Select (xSAB and xSBA) control pins are used to select either
real-timeorstoreddatatransfer.Thecircuitryusedforselectcontrol
willeliminatethetypicaldecodingglitchthatoccursinamultiplexer
duringthetransitionbetweenreal-timeandstoreddata. Alowinput
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)
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
ThePI74LPT16646canbedrivenfromeither3.3Vor5.0Vdevices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
• Multiple center pins and distributed Vcc/GND pins
minimize switching noise
6
• Packages available:
–56-pin240milwideplasticTSSOP(A)
–56-pin300milwideplasticSSOP(V)
7
8
Logic Block Diagram
1OE
2OE
9
1DIR
2DIR
1CLKBA
1SBA
2CLKBA
2SBA
10
11
12
13
14
15
1CLKAB
1SAB
2CLKAB
2SAB
B REG
D
B REG
D
C
C
1A0
2A0
A REG
A REG
D
1B0
2B0
D
C
C
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
PS2073A 01/16/97
1
PI74LPT16646
3.3V 16-BIT REGISTERED TRANSCEIVERS
Product Pin Description
Product Pin Configuration
Pin Name
Description
xOE, xDIR
xCLKAB, xCLKBA
xSAB, xSBA
xAx
Output Enable Inputs (Active LOW)
Clock Pulse Inputs
1OE
1CLKBA
1SBA
GND
1B1
1DIR
1CLKAB
1SAB
GND
1A1
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
2
Output Data Source Select Inputs
3
Data Register A Inputs
Data Register B Outputs
4
5
xBx
Data Register B Inputs
Data Register A Outputs
1B2
1A2
6
VCC
1B3
Vcc
7
1A3
8
GND
Ground
Power
1B4
1A4
9
VCC
1B5
1A5
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GND
1B6
GND
1A6
56-PIN
V56
A56
1B7
1A7
1B8
1A8
2B1
2A1
2B2
2A2
2B3
2A3
GND
2B4
GND
2A4
2B5
2A5
2B6
2A6
VCC
VCC
2B7
2A7
2A8
2B8
GND
2SBA
2CLKBA
2OE
GND
2SAB
2CLKAB
2DIR
Truth Table(2)
Inputs
xCLKAB xCLKBA
Data I/O(1)
Function
xOE
xDIR
xSAB xSBA
xAx
xBx
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
Note:
1. The data output functions may be enabled or disabled by various signals at the xOE or xDIR 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. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, ↑= LOW-to-HIGH Transition
PS2073A 01/16/97
2
PI74LPT16646
3.3V 16-BIT REGISTERED TRANSCEIVERS
REAL-TIME TRANSFER
BUS A TO B
REAL-TIME TRANSFER
BUS B TO A
1
2
BUS
A
BUS
B
BUS
A
BUS
B
3
4
5
xDIR xOE xCLKAB xCLKBA
xSAB xSBA
xDIR xOE xCLKAB xCLKBA
xSAB xSBA
L
L
X
X
X
L
H
L
X
X
L
X
STORAGE FROM
A AND/OR B
TRANSFER STORES
DATA TO A AND/OR B
6
BUS
BUS
BUS
A
BUS
B
A
B
7
8
9
xDIR xOE xCLKAB xCLKBA
xSAB xSBA
xDIR(1) xOE xCLKAB xCLKBA
xSAB xSBA
10
11
12
13
14
15
H
L
L
L
H
↑
X
↑
X
↑
X
X
X
X
X
X
L
H
L
L
X
H or L
H or L
X
X
H
H
X
X
↑
Note:
1. Cannot transfer data to A bus and B bus simultaneously.
PS2073A 01/16/97
3
PI74LPT16646
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:
StressesgreaterthanthoselistedunderMAXIMUM
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 sec-
tions of this specification is not implied. Exposure
toabsolutemaximumratingconditionsforextended
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.
PS2073A 01/16/97
4
PI74LPT16646
3.3V 16-BIT REGISTERED TRANSCEIVERS
Power Supply Characteristics
1
2
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
One Bit Toggling
50% Duty Cycle
VIN = GND
MHz
3
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = GND
VIN = VCC – 0.6V
VIN = GND
0.6
2.3
mA
4
5
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)
6
16 Bits Toggling
7
Notes:
8
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
9
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
10
11
12
13
14
15
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.
PS2073A 01/16/97
5
PI74LPT16646
3.3V 16-BIT REGISTERED TRANSCEIVERS
Switching Characteristics over Operating Range(1)
LPT16646
Com.
LPT16646A
Com.
LPT16646C
Com.
Parameters
Description
Conditions(2)
Min(3)
Max
Min(3)
Max
6.3
Min(3)
Max
5.4
Unit
t
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
PLH
PHL
PLH
PHL
SU
Propagation Delay
Bus to Bus
CL
= 50 pF
= 500Ω
2.0
9.0
2.0
1.5
ns
RL
Output Enable Time
2.0
2.0
2.0
2.0
4.0
2.0
6.0
—
14.0
9.0
9.0
11.0
—
2.0
2.0
2.0
2.0
2.0
1.5
5.0
—
9.8
6.3
6.3
7.7
—
1.5
1.5
1.5
1.5
2.0
1.5
5.0
—
7.8
6.3
5.7
6.2
—
ns
ns
ns
ns
ns
ns
ns
ns
X
DIR or
Output Disable Time(4)
DIR or OE to Bus
XOE to Bus
X
X
Propagation Delay
Clock to Bus
Propagation Delay
xSBA or xSAB to Bus
Setup Time HIGH or
LOW, BUS to Clock
Hold Time HIGH or
LOW, Bus to Clock
Clock Pulse Width(4)
HIGH or LOW
t
t
t
H
—
—
—
W
—
—
—
SK(o)
Output Skew(5)
0.5
0.5
0.5
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 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.
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
PS2073A 01/16/97
6
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