21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16245
PI5C162245 (25Ω)
Ω
16-Bit, 2-Port Bus Switch
Near-zero propagation delay
5Ω switches connect inputs to outputs
•
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2µA typical)
Ideally suited for notebook applications
Pin compatible with 74 series16245
Industrial operating temperature: 40°C to +85°C
Packages available:
48-pin 240 mil wide thin plastic TSSOP (A)
48-pin 150 mil wide plastic BQSOP (B)
48-pin 300 mil wide plastic SSOP (V)
Product Features
Product Description
Pericom Semiconductors PI5C series of logic circuits are produced
using the Companys advanced 0.6 micron CMOS technology.
The PI5C16245 and PI5C162245 are 16-bit, 2-port bus switches
that are pin compatible with the 74 series 16245 16-bit transceiver.
Two enable signals (nBE) turn the switches on, similar to the enable
signals of the 16245. The bus switch creates no additional
propagational delay or additional ground bounce noise.
The PI5C162245 device has a built-in 25-ohm series resistor to reduce
reflection noise, thus eliminating the need for an external terminating
resistor.
Logic Block Diagram
1
A
0
1
B
0
Product Pin Configuration
NC
1
B
0
1
B
1
GND
1
B
2
1
B
3
1
A
7
1
B
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
48-Pin
37
A,B,V
36
35
34
33
32
31
30
29
28
27
26
25
1
BE
1
A
0
1
A
1
GND
1
A
2
1
A
3
1
BE
2
A
0
2
B
0
2
A
7
2
B
7
2
BE
Truth Table
(1)
Function
Disconnect
Connect
nBE
H
L
nA0-7
Hi- Z
nB0- 7
V
CC
1
B
4
1
B
5
GND
1
B
6
1
B
7
2
B
0
2
B
1
GND
2
B
2
2
B
3
V
CC
2
B
4
2
B
5
GND
2
B
6
2
B
7
NC
V
CC
1
A
4
1
A
5
GND
1
A
6
1
A
7
2
A
0
2
A
1
GND
2
A
2
2
A
3
V
CC
2
A
4
2
A
5
GND
2
A
6
2
A
7
2
BE
Product Pin Description
Pin Name
nBE
nA
0
-nA
7
nB
0
-nB
7
1
Note:
1. H = High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
I/O
I
I/O
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
PS7025B
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16245/162245
16-Bit, 2-Port Bus Switch
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 & 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 ..........................................................................................0.5W
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.
DC Electrical Characteristics
(Over Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ±10%)
Parameters Description
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
I
OS
V
H
R
ON
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circuit Current
(3)
Input Hysteresis at Control Pins
Switch On Resistance
(4)
V
CC
= Min., V
IN
= 0.0V,
I
ON
= 48mA
V
CC
= Min., V
IN
= 2.4V,
I
ON
= 15mA
16245
162245
16245
162245
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0
≤
A, B
≤
V
CC
V
CC
= Min., I
IN
= –18mA
A (B) = 0V, B (A) = V
CC
Min.
2.0
–0.5
—
—
—
—
100
—
—
20
—
20
Typ
(2)
—
—
—
—
—
–0.7
—
150
5
28
10
35
Max.
—
0.8
±1
±1
±1
–1.2
—
—
7
40
15
48
Ω
Units
V
V
µA
µA
µA
V
mA
m
V
Ω
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(5)
C
IN
C
OFF
C
ON
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
V
IN
= 0V
Typ
—
—
—
Max.
6
6
8
Units
pF
pF
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 V
CC
= 5.0V, T
A
= 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. Measured by the voltage drop between A and B pins at indicated current through the switch. ON resistance is determined by the
lower of the voltages on the two (A,B) pins.
5. This parameter is determined by device characterization but is not production tested.
2
PS7025B
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16245/162245
16-Bit, 2-Port Bus Switch
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz(4)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
A and B Pins Open
nBE = GND
Control Input Toggling
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND or V
CC
V
IN
= 3.4V(3)
Min.
—
—
—
Typ
(2)
0.1
—
—
Max.
3.0
2.5
0.25
Units
µA
mA
mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs only); A and B pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified
frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is
guaranteed by design.
PI5C16245 Switching Characteristics over Operating Range
PI5C16245
Com.
Parame te rs
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
D e s cription
Propagation Delay
(2,3)
xAx to xBx, xBx to xAx,
Bus Enable TIme
xBE to xAx or xBx,
Bus Disable TIme
xBE to xAx or xBx,
Conditions
C
L
= 50pF
R
L
= 500
Ω
M in.
1.5
1.5
M ax.
0.25
6.5
5.5
ns
Units
PI5C162245 Switching Characteristics over Operating Range
PI5C162245
Com.
Parame te rs
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
D e s cription
Propagation Delay
(2,3)
xAx to xBx, xBx to xAx,
Bus Enable TIme
xBE to xAx or xBx,
Bus Disable TIme
xBE to xAx or xBx,
Conditions
C
L
= 50pF
R
L
= 500
Ω
M in.
1.5
1.5
M ax.
1.25
6.5
5.5
ns
Units
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance.
The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall
times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used
in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
3
PS7025B
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16245/162245
16-Bit, 2-Port Bus Switch
Applications Information
Logic Inputs
The logic enable inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a +5.0V
supply, the enable pins(s) may be driven low to 0V and high to 5.5V. Driving the enable pin(s) Rail-to-Rail
R
minimizes power consumption.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS devices. Always apply Vcc before applying
signals to the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola.
Ordering Information
Part
PI5C16245A
PI5C16245B
PI5C16245V
Pin Package
48- TSSOP (A)
48- BQSOP (B)
48- SSOP (V)
Te mpe rature
- 40°C to +85°C
48-Pin TSSOP (240 Mil Wide) - Package Code: A
48
.236
.244
6.0
6.2
1
.488 12.4
.496 12.6
.047
1.20 Max
SEATING PLANE
.004 0.09
.008 0.20
0.45 .018
0.75 .030
.319
BSC
8.1
.0197
BSC
0.50
.007
.010
0.17
0.27
.002
.006
0.05
0.15
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
4
PS7025B
06/21/00
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16245/162245
16-Bit, 2-Port Bus Switch
48-Pin BQSOP (150 Mil Wide) - Package Code: B
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.010 0.25
BSC
.386
.394
9.80
10.00
.008 0.20
Nom
Nom
.063 1.60
.079
2.0
Max
.002 0.05
.009 0.25
.020
.029
0.50
0.75
1
.014 0.356
REF
.015 0.381 x 45˚
.0157 BSC
0.40
.0051
.009
0.13
0.23
5˚
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
48-Pin SSOP (300 Mil Wide) - Package Code: V
48
.291
.299
7.39
7.59
.395
.420
10.03
10.67
Gauge Plane
.010 0.25
1
.02 0.51
.04 1.01
.620
.630
15.75
16.00
.008
0.20
Nom.
.015 0.381 x 45˚
.025 0.635
.110 2.79
Max
0-8˚
.025 BSC
0.635
.008 0.20
.0135 0.34
.008 0.20
.016 0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
5
PS7025B
06/21/00
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