PERICOM PI5C16245B

PI5C16245
Ω)
PI5C162245 (25Ω
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16-Bit, 2-Port Bus Switch
Product Features
Product Description
•
•
•
•
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)
Pericom Semiconductor’s PI5C series of logic circuits are produced
using the Company’s 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.
Product Pin Configuration
Logic Block Diagram
1A0
NC
1B0
GND
1B2
1
2
3
4
5
48
47
46
45
44
GND
1A2
1B3
VCC
1B4
6
7
8
43
42
41
1A3
VCC
1A4
1B0
1B1
1A7
1B7
1BE
1B5
2A0
2B0
2A7
2B7
2BE
Truth Table(1)
Function
nBE
nA0-7
Disconnect
H
Hi- Z
Connect
L
nB0- 7
1BE
1A0
1A1
GND
1B6
1B7
2B0
9
10
11
12
13
40
39
38
48-Pin 37
A,B,V 36
1A5
GND
1A6
1A7
2A0
2B1
GND
2B2
2B3
VCC
2B4
2B5
GND
2B6
2B7
NC
14
15
16
17
18
19
20
21
22
23
24
35
34
33
32
31
30
29
28
27
26
25
2A1
GND
2A2
2A3
VCC
2A4
2A5
GND
2A6
2A7
2BE
Product Pin Description
Pin Name
nBE
nA0-nA7
nB0-nB7
Note: 1. H = High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
1
I/O
I
I/O
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
PS7025B
06/21/00
PI5C16245/162245
16-Bit,
2-Port Bus Switch
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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
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, TA = –40°C to +85°C, VCC = 5V ±10%)
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
–0.5
—
0.8
V
IIH
Input HIGH Current
VCC = Max., VIN = VCC
—
—
±1
µA
IIL
Input LOW Current
VCC = Max., VIN = GND
—
—
±1
µA
IOZH
High Impedance Output Current
0 ≤ A, B ≤ VCC
—
—
±1
µA
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
IOS
Short Circuit Current(3)
A (B) = 0V, B (A) = VCC
100
—
—
mA
VH
Input Hysteresis at Control Pins
—
150
—
mV
16245
—
5
7
Ω
162245
20
28
40
16245
—
10
15
162245
20
35
48
RON
Switch On
Resistance(4)
VCC = Min., VIN = 0.0V,
ION = 48mA
VCC = Min., VIN = 2.4V,
ION = 15mA
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
Typ
Max.
Units
CIN
COFF
Input Capacitance
A/B Capacitance, Switch Off
VIN = 0V
VIN = 0V
—
—
6
6
pF
pF
CON
A/B Capacitance, Switch On
VIN = 0V
—
8
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, TA = 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
06/21/00
PI5C16245/162245
16-Bit,
2-Port Bus Switch
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
Typ(2)
Max.
Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
—
0.1
3.0
µA
∆ICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
—
—
2.5
mA
ICCD
Supply Current per
Input per MHz(4)
VCC = Max.,
A and B Pins Open
nBE = GND
Control Input Toggling
50% Duty Cycle
—
—
0.25
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 VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to ICC.
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
D e s cription
Conditions
M in.
M ax.
tPLH
tPHL
Propagation Delay (2,3)
xAx to xBx, xBx to xAx,
CL = 50pF
RL = 500Ω
–
0.25
tPZH
tPZL
Bus Enable TIme
xBE to xAx or xBx,
1.5
6.5
tPHZ
tPLZ
Bus Disable TIme
xBE to xAx or xBx,
1.5
5.5
Units
ns
PI5C162245 Switching Characteristics over Operating Range
PI5C162245
Com.
Parame te rs
D e s cription
Conditions
M in.
M ax.
tPLH
tPHL
Propagation Delay (2,3)
xAx to xBx, xBx to xAx,
CL = 50pF
RL = 500Ω
–
1.25
tPZH
tPZL
Bus Enable TIme
xBE to xAx or xBx,
1.5
6.5
tPHZ
tPLZ
Bus Disable TIme
xBE to xAx or xBx,
1.5
5.5
Units
ns
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
06/21/00
PI5C16245/162245
16-Bit,
2-Port Bus Switch
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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
Pin Package
PI5C16245A
48- TSSOP (A)
PI5C16245B
48- BQSOP (B)
PI5C16245V
48- SSOP (V)
Te mpe rature
- 40°C to +85°C
48-Pin TSSOP (240 Mil Wide) - Package Code: 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
.0197
BSC
0.50
X.XX
X.XX
.002
.006
0.05
0.15
.007
.010
0.17
0.27
0.45 .018
0.75 .030
.319
BSC
8.1
DENOTES DIMENSIONS
IN MILLIMETERS
4
PS7025B
06/21/00
PI5C16245/162245
16-Bit,
2-Port Bus Switch
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48-Pin BQSOP (150 Mil Wide) - Package Code: B
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.020
.029
0.50
0.75
.010 0.25
BSC
1
.014 0.356 REF
.386
.394
9.80
10.00
.015 0.381 x 45˚
.008 0.20 Nom
Nom
.063 1.60
.0157 BSC
0.40
.002 0.05
.009 0.25
5˚
.0051
.009
0.13
0.23
.079
2.0 Max
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
.02 0.51
.04 1.01
1
.015 0.381 x 45˚
.025 0.635
.008
0.20
Nom.
.620
.630
15.75
16.00
.110 2.79 Max
0-8˚
.025 BSC
0.635
.008 0.20
.016 0.40
.008 0.20
.0135 0.34
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