PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Transceivers
Features
Description
Common Features
• PI74FCT16245T and PI74FCT162245T are high-speed, lowpower devices with high-current drive
• VCC = 5V ±10%
• Hysteresis on all inputs
• Packaging (Pb-free & Green available):
– 48-pin 240-mil wide plastic TSSOP (A)
– 48-pin 300-mil wide plastic SSOP (V)
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
Pericom Semiconductor’s PI74FCT16245T and PI74FCT162245T
are 16-bit bidirectional transceivers designed for asynchronous twoway 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 8bit transceivers or one 16-bit transceiver. The output enable (OE)
input, when HIGH, disables both A and B ports by placing them
in Hi-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.
Block Diagram
1DIR
2DIR
1OE
2OE
1A0
2A0
1B0
2B0
1A1
2A1
1B1
2B1
1A2
2A2
1B2
2B2
1A3
2A3
1B3
2B3
1A4
2A4
1B4
2B4
1A5
2A5
1B5
2B5
1A6
2A6
1B6
2B6
1A7
2A7
1B7
2B7
1
PS2032G
08/02/05
PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Tranceivers
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............................................................................... 120mA
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 conditions 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.
Power Dissipation ................................................................................... 1.0W
Pin Configuration
Truth Table
Inputs(1)
1DIR
1
48
1OE
1B0
2
47
1A0
1B1
3
46
1A1
GND
4
45
GND
1B2
5
44
1A2
1B3
6
43
1A3
VCC
7
42
VCC
1B4
8
41
1A4
1B5
9
40
1A5
GND
10
39
GND
1B6
11
38
1A6
1B7
12
37
1A7
2B0
13
36
2A0
2B1
14
35
2A1
GND
15
34
GND
2B2
16
33
2A2
2B3
17
32
VCC
18
2B4
Outputs(1)
XOE
XDIR
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
High Z State
Note:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Z = High Impedance
Pin Description
Pin Name
Description
XOE
3-State Enable Inputs (Active LOW)
XDIR
Direction Control Input
XAX
Side A Inputs or 3-State Outputs
XBX
Side B Inputs or 3-State Outputs
2A3
GND
Ground
31
VCC
VCC
Power
19
30
2A4
2B5
20
29
2A5
GND
21
28
GND
2B6
22
27
2A6
2B7
23
26
2A7
2DIR
24
25
2OE
2
PS2032G
08/02/05
PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Tranceivers
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5.0V ±10%)
Parameters
Test Conditions(1)
Description
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
IIH
Input HIGH Current
IIL
Input LOW Current
IOZH
Min.
Typ.(2)
Max.
2.0
0.8
Standard Input, VCC = Max.
VIN = VCC
1
Standard I/O, VCC = Max.
VIN = VCC
1
Standard Input, VCC = Min.
VIN = GND
–1
Standard I/O, VCC = Min.
VIN = GND
–1
High Impedance
VCC = Max.
VOUT = 2.7V
1
IOZL
Output Current
VCC = Max.
VOUT = 0.5V
–1
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
IOS
Short Circuit Current
IO
Output Drive Current
VH
Input Hysteresis
VCC =
VCC =
Max.(3), V
Max.(3), V
OUT =
GND
–80
OUT =
2.5V
–50
–0.7
–1.2
–140
–300
–180
100
Units
V
µA
V
mA
mV
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 = 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.
PI74FCT16245T Output Drive Characteristics (Over the Operating Range)
Parameters
VOH
Description
Output HIGH Voltage
Test Conditions(1)
VCC = Min., VIN = VIH or VIL
Min.
Typ.(2)
IOH = –3.0mA
2.5
3.5
IOH = –15.0mA
2.4
3.5
Max.
V
IOH = –32.0mA
VOL
Output LOW Voltage
VCC = Min., VIN = VIH or VIL
IOFF
Power Down Disable
VCC = 0V, VIN or VOUT ≤ 4.5V
IOL = 64mA
Units
0.2
0.55
—
—
±100
µA
Min.
Typ.(2)
Max.
Units
2.4
3.3
PI74FCT162245T Output Drive Characteristics (Over the Operating Range)
Parameters
Description
Test Conditions(1)
VOH
Output HIGH Voltage
VCC = Min., VIN = VIH or VIL
IOH = –24.0mA
VOL
Output LOW Voltage
VCC = Min., VIN = VIH or VIL
IOL = 24mA
IODL
Output LOW Current
IODH
Output HIGH Current
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3)
3
0.3
0.55
60
115
160
–60
–115
–150
PS2032G
V
mA
08/02/05
PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Tranceivers
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ.
Max.
CIN
Input Capacitance
VIN = 0V
4.5
6
COUT
Output Capacitance
VOUT = 0V
5.5
8
Units
pF
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 = 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. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters
ICC
ΔICC
ICCD
IC
Description
Test Conditions(1)
Min.
Typ.(2)
Max.
Units
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or
VCC
0.1
500
µA
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
0.5
1.5
mA
Supply Current per
Input per MHz(4)
VCC = Max.,
Outputs Open
XOE = xDIR = GND
One Bit Toggling
50% Duty Cycle
VIN = VCC,
VIN = GND
60
100
µA/
MHz
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = xDIR = GND
One Bit Toggling
VIN = VCC,
VIN = GND
0.7
2.5(5)
VIN = 3.4V
0.9
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = xDIR = GND
16 Bits Toggling
VIN = VCC,
VIN = GND
2.5
VIN = 3.4V
6.5
Total Power Supply
Current(6)
3.3(5)
5.5(5)
mA
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 + ΔICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current
ΔICC = 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.
4
PS2032G
08/02/05
PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Tranceivers
PI74FCT16245T Switching Characteristics over Operating Range
Parameters
Description
16245T
16245AT
16245CT
Com.
Com.
Com.
Conditions(1)
Units
Min.
Max.
Min.
Max.
Min.
Max.
tPHL
tPHL
Propagation Delay(2)
A TO B, B TO A
1.5
7.0
1.5
4.6
1.5
4.1
ns
tPZH
tPZL
Output Enable Time
XOE to A OR B
1.5
9.5
1.5
6.2
1.5
5.8
ns
1.5
7.5
1.5
5.0
1.5
4.8
ns
1.5
9.5
1.5
6.2
1.5
5.8
ns
tPHZ
tPLZ
Output Disable Time(3)
XOE to A OR B
tPZH
tPZL
Output Enable Time
(3)
XDIR to A OR B
tPHZ
tPLZ
Output Disable Time
(3)
XDIR to A OR B
1.5
7.5
1.5
5.0
1.5
4.8
ns
Output Skew(4)
—
0.5
—
0.5
—
0.5
ns
TSK(O)
CL = 50pF
RL = 500Ω
PI74FCT162245T Switching Characteristics over Operating Range
Parameters
Description
162245T
162245AT
162245CT
Com.
Com.
Com.
Conditions(1)
Units
Min.
Max.
Min.
Max.
Min.
Max.
tPHL
tPHL
Propagation Delay(2)
A to B, B to A
1.5
7.0
1.5
4.6
1.5
4.1
ns
tPZH
tPZL
Output Enable Time
xOE to A or B
1.5
9.5
1.5
6.2
1.5
5.8
ns
1.5
7.5
1.5
5.0
1.5
4.8
ns
1.5
9.5
1.5
6.2
1.5
5.8
ns
tPHZ
tPLZ
Output Disable Time(3)
xOE to A or B
tPZH
tPZL
Output Enable Time
xDIR to A or B(3)
tPHZ
tPLZ
Output Disable Time
xDIR to A or B(3)
1.5
7.5
1.5
5.0
1.5
4.8
ns
Output Skew(4)
—
0.5
—
0.5
—
0.5
ns
tsk(o)
CL = 50pF
RL = 500Ω
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
4. Skew between any two outputs, of the same package, switching in the same direction.
This parameter is guaranteed by design.
5
PS2032G
08/02/05
PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Tranceivers
Packaging Mechanical: 48-Pin, 240-mil wide Plastic TSSOP (A)
48
.236
.244
1
6.0
6.2
.488 12.4
.496 12.6
.047
1.20 Max
SEATING PLANE
.004 0.09
.008 0.20
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.0197
BSC
0.50
0.45 .018
0.75 .030
.002
.006
0.05
0.15
.007
.010
0.17
0.27
.319
BSC
8.1
Packaging Mechanical: 48-pin 300-mil wide plastic SSOP (V)
48
.291
.299
7.39
7.59
.395
.420
10.03
10.67
Gauge Plane
.010 0.25
.02 0.51
.04 1.01
1
.620
.630
15.75
16.00
.015 0.381 x 45˚
.025 0.635
.008
0.20
Nom.
.110 2.79 Max
.025 BSC
0.635
.008 0.20
.0135 0.34
0-8˚
.008 0.20
.016 0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
6
PS2032G
08/02/05
PI74FCT16245T
PI74FCT162245T
Fast CMOS 16-Bit Bidirectional Tranceivers
PI74FCT16245T Ordering Information
Ordering Code
Package Code
Speed Grade
Package Description
PI74FCT16245TA
A
Blank
48-pin 240-mil wide plastic TSSOP
PI74FCT16245TAE
A
Blank
Pb-free & Green, 48-pin 240-mil wide plastic TSSOP
PI74FCT16245TV
V
Blank
48-pin 300-mil wide plastic SSOP
PI74FCT16245TVE
V
Blank
Pb-free & Green, 48-pin 300-mil wide plastic SSOP
PI74FCT16245ATA
A
A
48-pin 240-mil wide plastic TSSOP
PI74FCT16245ATAE
A
A
Pb-free & Green, 48-pin 240-mil wide plastic TSSOP
PI74FCT16245ATV
V
A
48-pin 300-mil wide plastic SSOP
PI74FCT16245ATVE
V
A
Pb-free & Green, 48-pin 300-mil wide plastic SSOP
PI74FCT16245CTA
A
C
48-pin 240-mil wide plastic TSSOP
PI74FCT16245CTAE
A
C
Pb-free & Green, 48-pin 240-mil wide plastic TSSOP
PI74FCT16245CTV
V
C
48-pin 300-mil wide plastic SSOP
PI74FCT16245CTVE
V
C
Pb-free & Green, 48-pin 300-mil wide plastic SSOP
PI74FCT162245T Ordering Information
Ordering Code
Package Code
Speed Grade
Package Description
PI74FCT162245TA
A
Blank
48-pin 240-mil wide plastic TSSOP
PI74FCT162245TAE
A
Blank
Pb-free & Green, 48-pin 240-mil wide plastic TSSOP
PI74FCT162245TV
V
Blank
48-pin 300-mil wide plastic SSOP
PI74FCT162245TVE
V
Blank
Pb-free & Green, 48-pin 300-mil wide plastic SSOP
PI74FCT162245ATA
A
A
48-pin 240-mil wide plastic TSSOP
PI74FCT162245ATAE
A
A
Pb-free & Green, 48-pin 240-mil wide plastic TSSOP
PI74FCT162245ATV
V
A
48-pin 300-mil wide plastic SSOP
PI74FCT162245ATVE
V
A
Pb-free & Green, 48-pin 300-mil wide plastic SSOP
PI74FCT162245CTA
A
C
48-pin 240-mil wide plastic TSSOP
PI74FCT162245CTAE
A
C
Pb-free & Green, 48-pin 240-mil wide plastic TSSOP
PI74FCT162245CTV
V
C
48-pin 300-mil wide plastic SSOP
PI74FCT162245CTVE
V
C
Pb-free & Green, 48-pin 300-mil wide plastic SSOP
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
7
PS2032G
08/02/05
