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PI74FCT162245ATA

P1-P3P4-P6
1
PS2032D 05/17/99
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
Product Features
Common Features
• PI74FCT16245T, PI74FCT162245T and PI74FCT162H245
are high-speed, low-power devices with high-current drive
•V
CC
= 5V ± 10%
• Hysteresis on all inputs
• Packages 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: I
OH
= –32mA; I
OL
= 64mA
• Power off disable outputs permit “live insertion”
• Typical V
OLP
(Output Ground Bounce)
< 1.0V at V
CC
= 5V, T
A
= 25°C
PI74FCT162245T Features
• Balanced output drivers: ±24mA
• Reduced system switching noise
• Typical V
OLP
(Output Ground Bounce)
< 0.6V at V
CC
= 5V, T
A
= 25°C
PI74FCT162H245T Features
• Bus Hold retains last active bus state during Three-State
• Eliminates the need for external pull-up resistors
PI74FCT16245T
PI74FCT162245T
PI74FCT162H245T
Fast CMOS 16-Bit
Bidirectional Transceivers
PI74FCT16245T/162245T/162H245T
Fast CMOS 16-Bit Bidirectional Tranceivers
2
PS2032D 05/17/99
Product Pin Description
Pin Name Description
xOE 3-State Enable Inputs (Active LOW)
xDIR Direction Control Input
xAx Side A Inputs or 3-State Outputs
(1)
xBx Side B Inputs or 3-State Outputs
(1)
GND Ground
V
CC
Power
Inputs
(1)
xOE xDIR Outputs
(1)
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X High Z State
Truth Table
Note:
1.H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Z = High Impedance
Product Pin Configuration
Note:
1. For the PI74FCT162H245T, these pins have “Bus Hold.”
All other pins are standard, outputs, or I/Os.
48-Pin
V48
A48
K48
PI74FCT16245T/162245T/162H245T
Fast CMOS 16-Bit Bidirectional Tranceivers
3
PS2032D 05/17/99
Parameters Description Test Conditions
(1)
Min. Typ.
(2)
Max. Units
VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V
VIL Input LOW Voltage Guaranteed Logic LOW Level 0.8 V
IIH Input HIGH Current Standard Input, VCC = Max. VIN = VCC 1µA
IIH Input HIGH Current Standard I/O, VCC = Max. VIN = VCC 1µA
IIH Input HIGH Current Bus Hold Input
(4)
, VCC = Max. VIN = VCC ±100 µA
IIH Input HIGH Current Bus Hold I/O
(4)
, VCC = Max. VIN = VCC ±100 µA
IIL Input LOW Current Standard Input, VCC = Min. VIN = GND –1 µA
IIL Input LOW Current Standard I/O, VCC = Min. VIN = GND –1 µA
IIL Input LOW Current Bus Hold Input
(4)
, VCC = Min. VIN = GND ±100 µA
IIL Input LOW Current Bus Hold I/O
(4)
, VCC = Min. VIN = GND ±100 µA
IBHH Bus Hold Bus Hold Input
(4)
, VCC = Min. VIN = 2.0V –50 µA
IBHL Sustain Current VIN = 0.8V +50
IOZH
(5)
High Impedance VCC = Max. VOUT = 2.7V 1 µA
IOZL
(5)
Output Current VCC = Max. VOUT = 0.5V –1 µA
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA –0.7 –1.2 V
IOS Short Circuit Current VCC = Max.
(3)
, VOUT = GND –80 –140 –200 mA
IO Output Drive Current VCC = Max.
(3)
, VOUT = 2.5V –50 –180 mA
VH Input Hysteresis 100 mV
Storage Temperature ...........................................................–65°C to +150°C
Ambient Temperature with Power Applied ..........................–40°C to +85°C
Supply Voltage to Ground Potential (Inputs & V
CC
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 ............................................................................. 120mA
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
sections of this specification is not implied.
Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +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. Pins with Bus Hold are identified in the pin description.
5. This specification does not apply to bi-directional functionalities with Bus Hold.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
DC Electrical Characteristics (Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5.0V ±10%)
P1-P3P4-P6

PI74FCT162245ATA

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Description:
IC TXRX NON-INVERT 5.5V 48TSSOP
Lifecycle:
New from this manufacturer.
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