PERICOM PI3C16225

PI3C16225
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3.3V, High Bandwidth, Low Capacitance
12-Bit to 24-Bit Mux/Demux Bus Switch
(16292 Pinout)
Product Features
Product Description
• RON is 9 Ohm typical
Pericom Semiconductor’s PI3C series of bus switch circuits are
produced using the Company’s advanced submicron CMOS
technology, achieving industry performance.
• Pulldown on B ports
• Near-Zero Propagation Delay
The PI3C16225 is a 12-bit to 24-bit, multiplexer/demultiplexer bus
switch that provides industry leading advantages such as almost
zero propagation delay of 500ps owing to 9ohm channel resistance
and low I/O capacitance. A1 port demultiplexes to either B1 or B2 port
and the switch is bidirectional.
• Industrial Operation Temperature –40C to +85C
• Switching speed: 4.5ns max (for 3.3V operation)
• Channel ON capacitance: 9pF typ.
• VCC Operating Range: +2V to +3.6V
• >100 MHz bandwidth
Applications
• Packages Available:
• Provides Memory Module Switching
– 56-pin TSSOP (A)
Logic Block Diagram
Product Pin Configuration
1B1
1A1
S0
1 A1
NC
2 A1
NC
1B2
3 A1
NC
GND
4 A1
NC
5 A1
NC
6A1
NC
7A1
NC
VCC
8A1
GND
NC
9A1
NC
10A1
NC
11A1
NC
12A1
NC
12B1
12A1
12B2
S0
Truth Table
Function
S0
nA1 to nB1
L
nA1 to nB2
H
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56-Pin
A
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
NC
NC
1B1
1B2
2B1
2B2
3 B1
GND
3B2
4B1
4B2
5B1
5B2
6B1
6B2
7B1
7B2
8B1
GND
8B2
9 B1
9B2
10B1
10B2
11B1
11B2
12B1
12B2
PS8458D
03/13/01
PI3C16225
3.3V, High Bandwidth, Low Capacitance 12-Bit to
24-Bit Mux/Demux Bus Switch (16292 Pinout)
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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 +4.6V
Supply Voltage to Ground Potential (Outputs & D/O Only) .......–0.5V to +4.6V
DC I/O Voltage ..........................................................................–0.5V to +5.5V
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 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.
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
IO
B- port Pulldown Current
VCC = Min., VO = VCC
SEL = High for B1
SEL = Low for B2
2.5
3.8
—
mA
Clamp diode Voltage
VCC = Min., IIN = –18mA
—
–0.73
–1.2
V
VCC = Min.,VIN = 0.0V
ION = 48mA or 64mA
—
9
12
VCC = Min.,VIN = 2.4V
ION = 15mA
—
VIK
Switch On Resistance(4)
RON
V
µA
Ω
16
23
Capacitance (TA = 25°C f = 1 MHz)
Parame te rs (5)
D e s cription
CIN
Input Capacitance
CON
A/B Capacitance, Switch O n
Te s t Conditions
VIN = 0V
Typ.
M ax.
3.5
—
9.3
11
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 = 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
PS8458D
03/13/01
PI3C16225
3.3V, High Bandwidth, Low Capacitance 12-Bit to 24-Bit
Mux/Demux Bus Switch (16292 Pinout)
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Power Supply Characteristics
Parame te rs
D e s cription
ICC
Q uiescent Power Supply Current
∆ICC
Supply Current per Input @ TTL HIGH
Te s t Conditions (1)
VCC = Max., VIN = GND or VCC
VCC = Max., VIN
=
3.0V(3)
M in.
Typ.(2)
—
260
850
—
—
750
M ax. 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.
PI3C16225 Switching Characteristics Over Operating Range
Com.
Parame te rs
De s cription
Conditions (1)
M in.
M ax.
tPLH
tPHL
Propogation Delay(2,3)
Ax to Bx, Bx to Ax
CL = 25pF
RL = 500Ω
—
0.5
tPZH
tPZL
Bus Enable Time
S0 to Ax or Bx
1.3
6.5
tPHZ
tPLZ
Bus Disable Time
S0 to Ax or Bx
1.5
5.5
CL = 25pF
RL = 500Ω
R = 500Ω
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 0.5ns for 25pF 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
PS8458D
03/13/01
PI3C16225
3.3V, High Bandwidth, Low Capacitance 12-Bit to
24-Bit Mux/Demux Bus Switch (16292 Pinout)
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56-Pin TSSOP (A) Package
56
.236 6.0
.244 6.2
1
.547 13.9
.555 14.1
1.20
.047
Max.
SEATING PLANE
.004 0.09
.008 0.20
.0197
BSC
0.50
.007
.011
.002
.006
0.05
0.15
0.17
0.27
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
0.45 .018
0.75 .030
.319 BSC
8.1
Ordering Information
Part
Pin - Package
Width
Te mpe rature
PI3C16225A
56 - TSSOP (A)
240- mil
–40°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
PS8458D
03/13/01