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PDF PI74LPT16646 Data sheet ( Hoja de datos )
| Número de pieza | PI74LPT16646 | |
| Descripción | Fast CMOS 3.3V 16-Bit Registered Transceivers | |
| Fabricantes | Pericom Semiconductor | |
| Logotipo |  |
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PI74LPT16646
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PI74LPT166461122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122
Fast CMOS 3.3V 16-Bit Registered Transceivers 1
Product Features
• Compatible with LCX™ and LVT™ families of products
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
– Output can be 3V or connected to 5V bus
• Advanced Low Power CMOS Operation
• Excellent output drive capability:
Balanced drives (24 mA sink and source)
• 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
• Packages available:
– 56-pin 240 mil wide plastic TSSOP (A)
– 56-pin 300 mil wide plastic SSOP (V)
Product Description
2
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.
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) and direction pins (xDIR) to control the transceiver functions.
The Select (xSAB and xSBA) 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.
3
4
5
The PI74LPT16646 can be driven from either 3.3V or 5.0V devices
6allowing this device to be used as a translator in a mixed
3.3/5.0V system.
7
Logic Block Diagram
1OE
1DIR
1CLKBA
1SBA
1CLKAB
1SAB
1A0
A REG
D
C
B REG
D
C
2OE
2DIR
2CLKBA
2SBA
2CLKAB
2SAB
2A0
1B0
A REG
D
C
8
9
10
11
12B REG
D
C
132B0
14
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
15
1 PS2073A 01/16/97
1 page  
PI74LPT16646
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Power Supply Characteristics
Parameters Description
ICC Quiescent Power Supply Current
∆ICC Quiescent Power Supply Current
TTL Inputs HIGH
ICCD Dynamic Power Supply(4)
IC Total Power Supply
Current(6)
Test Conditions(1)
VCC = Max.
VIN = GND or VCC
VCC = Max.
VIN = VCC – 0.6V(3)
Min.
Typ(2)
0.1
2.0
Max.
10
30
Units
µA
µA
1
2
VCC = Max.,
Outputs Open
XOE = GND
One Bit Toggling
50% Duty Cycle
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = GND
One Bit Toggling
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = GND
16 Bits Toggling
VIN = VCC
VIN = GND
VIN = VCC – 0.6V
VIN = GND
VIN = VCC – 0.6V
VIN = GND
50 75 µA/
MHz 3
40.6 2.3 mA
5
2.1 4.7(5)
6
7
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.
8
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10
11
12
13
14
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5 PS2073A 01/16/97
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet PI74LPT16646.PDF ] | |
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