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PDF PI74FCT16245T Data sheet ( Hoja de datos )
| Número de pieza | PI74FCT16245T | |
| Descripción | Fast CMOS 16-Bit Bidirectional Transceivers | |
| Fabricantes | Pericom Semiconductor Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PI74FCT16245T (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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PI74FCT16245T
PI74FCT162245T
PI74FCT162H245T
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Fast CMOS 16-Bit
Bidirectional Transceivers
Product Features
Common Features
• PI74FCT16245T, PI74FCT162245T and PI74FCT162H245
are high-speed, low-power devices with high-current drive
• VCC = 5V ± 10%
• Hysteresis on all inputs
www.DataS•hePeta4cUk.acgomes available:
– 48-pin 240 mil wide plastic TSSOP (A48)
– 48-pin 173 mil wide plastic TVSOP (JEDEC TSSOP K48)
– 48-pin 300 mil wide plastic SSOP (V48)
PI74FCT16245T Features
• High output drive: IOH = –32mA; IOL = 64mA
• Power off disable outputs permit “live insertion”
• Typical VOLP (Output Ground Bounce)
< 1.0V at VCC = 5V, TA = 25°C
PI74FCT162245T Features
• Balanced output drivers: ±24mA
• Reduced system switching noise
• Typical VOLP (Output Ground Bounce)
< 0.6V at VCC = 5V, TA = 25°C
PI74FCT162H245T Features
• Bus Hold retains last active bus state during Three-State
• Eliminates the need for external pull-up resistors
Product Description
Pericom Semiconductor’s PI74FCT series of logic circuits are
produced using the Company’s advanced 0.6 micron CMOS
technology, achieving industry leading speed grades.
The PI74FCT16245T, PI74FCT162245T, and PI74FCT162H245T
are 16-bit bidirectional transceivers designed for asynchronous
two-way communication between data buses. The direction control
input pin (xDIR) determines the direction of data flow through the
bidirectional transceiver. The Direction and Ouput Enable controls
are designed to operate these devices as either two independent
8-bit transceivers or one 16-bit transceiver. The output enable (OE)
input, when HIGH, disables both A and B ports by placing them in
HIGH Z condition.
The PI74FCT16245T output buffers are designed with a Power-
Off disable allowing “live insertion” of boards when used as
backplane drivers.
The PI74FCT162245T has ±24mA balanced output drivers. It is
designed with current limiting resistors at its outputs to control the
output edge rate resulting in lower ground bounce and undershoot.
This eliminates the need for external terminating resistors for most
interface applications.
The PI74FCT162H245T has “Bus Hold” which retains the input’s
last state whenever the input goes to high-impedance preventing
“floating” inputs and eliminating the need for pull-up/down resistors.
Logic Block Diagram
1 DIR
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1 OE
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2 DIR
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2 OE
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
1 PS2032D 05/17/99
1 page  
PI74FCT16245T/162245T/162H245T
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Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ.(2) Max. Units
ICC Quiescent Power
Supply Current
∆ICC Supply Current per
Input @ TTL HIGH
VCC = Max.
VCC = Max.
VIN = GND or VCC
VIN = 3.4V(3)
0.1 500 µA
0.5 1.5 mA
ICCD
www.DataSheet4U.com
Supply Current per
Input per MHz(4)
IC Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
XOE = xDIR = GND
One Bit Toggling
50% Duty Cycle
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = xDIR = GND
One Bit Toggling
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = xDIR = GND
16 Bits Toggling
VIN = VCC
VIN = GND
VIN = VCC
VIN = GND
VIN = 3.4V
VIN = GND
VIN = VCC
VIN = GND
VIN = 3.4V
VIN = GND
60 100 µA/
MHz
0.7 2.5(5) mA
0.9 3.3(5)
2.5 5.5(5)
6.5 17.5(5)
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V); 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
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
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)
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
5 PS2032D 05/17/99
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet PI74FCT16245T.PDF ] | |
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