PERICOM PI5C16861VE

PI5C16861
PI5C162861 (25Ω)
20-Bit, 2-Port Bus Switch
Features
Description
•
•
•
•
Near-Zero propagation delay
5Ω or 25Ω switches connect inputs to outputs
Direct bus connection when switches are ON
32X384 function with flow through pinout make board layout
easier
• Ultra-low quiescent power (0.2 µA typical) – ideally suited
for notebook applications
• Industrial operating temperature: –40°C to +85°C
Pericom Semiconductor’s PI5C16861 is configured as a 20-bit, 2port bus switch designed with a low On-Resistance (5Ω) allowing
inputs to be connected directly to outputs. The bus switch creates no
additional propagational delay or additional ground bounce noise. The
switches are turned ON by the Bus Enable (BEx) input signal.
The PI5C162861 device has a built-in 25Ω series resistor to reduce
noise resulting from reflections, thus eliminating the need for an
external terminating resistor.
• Packaging (Pb-free & Green available):
– 48-pin 240-mil wide plastic TSSOP (A)
– 48-pin 300-mil wide plastic SSOP (V)
– 48-pin 150-mil wide plastic BQSOP (B)
Pin Configuration
Block Diagram
A0
B0
A9
B9
BE1
A10
B10
A19
B19
BE2
Truth Table(1)
Function
Disconnect
Connect
BEX
H
L
A19-A0
Hi-Z
B19-B0
NC
1
48
VCC
A0
2
47
BE1
A1
3
46
B0
A2
4
45
B1
A3
5
44
B2
A4
6
43
B3
A5
7
42
B4
A6
8
41
B5
A7
9
40
B6
A8
10
39
B7
A9
11
38
B8
GND
12
37
B9
NC
13
36
VCC
A10
14
35
BE2
A11
15
34
B10
A12
16
33
B11
A13
17
32
B12
A14
18
31
B13
A15
19
30
B14
A16
20
29
B15
A17
21
28
B16
A18
22
27
B17
A19
23
26
B18
GND
24
25
B19
Pin Description
Note:
1. H = High Voltage Level, L = Low Voltage Level,
Hi-Z = High Impedance
1
Pin Name
Description
BEx
A19-A0
B19-B0
Bus Enable Inputs (Active LOW)
Bus A
Bus B
PS7026E
09/13/04
PI5C16861/162861
20-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 & 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 .................................................................................... 0.5W
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%)
Parameters
Test Conditions(1)
Description
Min.
Typ(2)
Max.
Units
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
—
—
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
—
0.8
IIH
Input HIGH Current
VCC = Max., VIN = VCC
—
—
±1
IIL
Input LOW Current
VCC = Max., VIN = GND
—
—
±1
IOZH
High Impedance Output
Current
0 ≤ A, B ≤ VCC
—
—
±1
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
ION
Short Circuit
A (B) = 0V, B (A) = VCC
100
—
—
mA
VH
Input Hysteresis at Control Pins
—
150
—
mV
Current(3)
Switch On-Resistance(4)
RON
VCC = Min., VIN = 0.0V,
16861
—
5
7
ION = 48mA
162861
20
28
40
VCC = Min., VIN = 2.4V,
16861
—
10
15
ION = 15mA
162861
20
35
48
V
µA
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
CIN
Description
Test Conditions
Input Capacitance
COFF
A/B Capacitance, Switch Off
CON
A/B Capacitance, Switch On
Typ
Units
6
VIN = 0V
6
pF
8
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 pin 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
PS7026E
09/13/04
PI5C16861/162861
20-Bit, 2-Port Bus Switch
Power Supply Characteristics
Parameters
Test Conditions(1)
Description
Min.
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND
or VCC
ΔICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
ICCD
Supply Current per
Input per MHz(4)
VCC = Max., A and B Pins Open
BEX = GND, Control Input Toggling
50% Duty Cycle
Typ(2)
Max.
Units
0.1
10
µA
2.5
mA
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.
PI5C16861 Switching Characteristics over Operating Range
PI5C16861
Parameters
Conditions(1)
Description
Com.
Min
tPLH
tPHL
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
BEx to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BEx to Ax or Bx
Unit
Max
1.25
CL = 50pF
RL = 500Ω
1.5
6.5
1.5
5.5
ns
PI5C162861 Switching Characteristics over Operating Range
PI5C162861
Parameters
Description
Conditions
(1)
Com.
Min
tPLH
tPHL
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
BEx to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BEx to Ax or Bx
Unit
Max
1.25
CL = 50pF
RL = 500Ω
1.5
6.5
1.5
5.5
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
PS7026E
09/13/04
PI5C16861/162861
20-Bit, 2-Port Bus Switch
Packaging Mechanical: 48-pin 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 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
4
PS7026E
09/13/04
PI5C16861/162861
20-Bit, 2-Port Bus Switch
Packaging Mechanical: 48-pin BSQOP (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
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
5˚
.0051
.009
0.13
0.23
.079
2.0 Max
.002 0.05
.009 0.25
Ordering Information
Ordering Code
PI5C16861A
PI5C16861AE
PI5C16861V
PI5C16861VE
PI5C16861B
PI5C16861BE
PI5C162861A
PI5C162861AE
PI5C162861V
PI5C162861VE
PI5C162861B
PI5C162861BE
Package Type
A
A
V
V
B
B
A
A
V
V
B
B
Package Description
48-Pin, TSSOP
Pb-free & Green, 48-Pin, TSSOP
48-Pin, SSOP
Pb-free & Green, 48-Pin, SSOP
48-Pin, BQSOP
Pb-free & Green, 48-Pin, BQSOP
48-Pin, TSSOP
Pb-free & Green, 48-Pin, TSSOP
48-Pin, SSOP
Pb-free & Green, 48-Pin, SSOP
48-Pin, BQSOP
Pb-free & Green, 48-Pin, BQSOP
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
2. X = Tape and reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
5
PS7026E
09/13/04