PERICOM PI3C16212

PI3C16212
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3.3V, High Bandwidth, 24-Bit Bus Exchange Switch
Product Features
Product Description
• Near-zero propagation delay
Pericom Semiconductor’s PI3C series of bus switch circuits are
produced using the Company’s advanced submicron CMOS
technology.
• 6Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
The PI3C16212 is 24-bit bus exchange switch designed with a low
ON resistance allowing inputs to be connected directly to outputs.
This device operates as a 24-bit bus switch or a 12-bit exchanger,
which provides data exchanging between the four signal ports via
the data select pins (S0-S2).
• Ultra-low quiescent power (0.2mA typical)
– Ideally suited for notebook applications
• Industrial operating temperature: –40°C to +85°C
• Packages available:
– 56-pin 240-mil wide thin plastic TSSOP (A)
Product Pin Configuration
Logic Block Diagram
S0
ONE OF TWELVE CHANNELS
1A1
1B1
1A1
1A2
2A 1
2A2
3A1
3A2
1B2
1A2
GND
4A1
4A2
FLOW CONTROL
5A1
5A2
S0
S1
S2
6A1
6A2
7A1
7A2
VCC
8A1
GND
Truth Table
Function
Disconnect
A1 to B1
A1 to B2
A2 to B1
A2 to B2
Disconnect
S2
L
L
L
L
H
H
S1
L
L
H
H
L
L
S0
L
H
L
H
L
H
A1
Z
B1
B2
Z
Z
Z
A2
Z
Z
Z
B1
B2
Z
A1 to B1, A2 to B2
A1 to B2, A2 to B1
H
H
H
H
L
H
B1
B2
B2
B1
8A2
9A1
9A2
10A1
10A2
11 A1
11 A2
12A1
12A2
56
55
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
54
53
52
51
50
49
48
47
56-Pin
A
25
26
27
28
46
45
44
43
42
41
40
39
38
37
36
35
34
33
S1
S2
1B1
1B 2
2B1
2B 2
3B1
GND
3B 2
4B1
4B 2
5B1
5B 2
6B1
6B 2
7B1
7B 2
8B 1
GND
8B 2
9B1
9B 2
10B1
10B2
32
11 B1
31
11 B2
30
12B1
29
12B2
Product Pin Description
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
Pin Name
S0-S2
xAx
xBx
1
I/O
I
I/O
I/O
Description
Select Inputs
Bus A
Bus B
PS8454C
01/11/02
PI3C16212
3.3V,
High
Bandwidth
24-Bit
Bus
Exchange
Switch
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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.
Storage Temperature............................................................. –65°C to +150°C
Ambient Temperature with Power Applied .............................. –40°C to +85°C
Supply Voltage to Ground Potential .......................................... –0.5V to +4.6V
DC I/O Voltage .......................................................................... –0.5V to +5.5V
DC Output Current ................................................................................. 120mA
Power Dissipation .................................................................................... 0.5W
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parame te rs
Te s t Conditions (1 )
De s cription
M in.
Typ.(2 )
M ax.
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
VC C = Max., VIN = VC C
—
—
±1
IIL
Input LOW Current
VC C = Max., VIN = GND
—
—
±1
IO ZH
High- Impedence Output Current
0 ≤ A, B ≤ VC C
—
—
±1
VIK
Clamp diode Voltage
VC C = Min., IIN = –18mA
—
–0.73
–1.2
VC C = Min.,VIN = 0.0V
IO N = 48mA or 64mA
—
6.5
8.5
VC C = Min.,VIN = 2.4V
IO N = 15mA
—
10
15
Switch On
RO N
Resistance(4 )
Units
V
µA
V
Ω
Capacitance (TA = 25°C f = 1 MHz)
Parame te rs (5)
De s cription
CIN
Input Capacitance
C O FF
A/B Capacitance, Switch Off
CON
A/B Capacitance, Switch On
Te s t Conditions
Typ.
Units
3.5
VIN = 0V
4.0
pF
12.0
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 = 3.3V, 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
PS8454C
01/11/02
PI3C16212
3.3V,
High
Bandwidth
24-Bit
Bus
Exchange
Switch
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Power Supply Characteristics
Parame te rs
D e s cription
Te s t Conditions (1)
M in.
Typ.(2)
M ax.
—
260
850
—
—
750
ICC
Q uiescent Power Supply Current
VCC = Max., VIN = GND or VCC
∆ICC
Supply Current per Input @ TTL HIGH
VCC = Max., VIN
=
3.0V(3)
Units
µA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 3.3V, +25°C ambient.
3. Per TTL driven input (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.
PI3C16212 Switching Characteristics Over Operating Range
Parame te rs
Conditions (1)
De s cription
tPLH
tPHL
Propogation Delay(2,3)
Ax to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
Sn to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
Sn to Ax or Bx
CL = 50pF
RL = 500Ω
CL = 50pF
RL = 500Ω
Com.
M in.
M ax.
—
0.50
1.5
6.5
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
PS8454C
01/11/02
PI3C16212
3.3V,
High
Bandwidth
24-Bit
Bus
Exchange
Switch
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56-Pin TSSOP (A) Package
56
.236
.244
1
.547
.555
6.0
6.2
13.9
14.1
1.20
.047
Max.
SEATING PLANE
.004 0.09
.008 0.20
.0197
BSC
0.50
.007
.011
0.17
0.27
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.002
.006
0.05
0.15
0.45 .018
0.75 .030
.319 BSC
8.1
Ordering Information
Part
Pin - Package
Width
Te mpe rature
PI3C16212A
56 - TSSO P (A)
240- mil
0°C to 85°C
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8454C
01/11/02