21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
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2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C16226
3.3V, High-Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
Product Features
·
·
·
·
·
·
·
·
·
R
ON
is 9-Ohm typical
Pulldown on B ports
Industrial Operation Temperature: 40ºC to +85ºC
Near Zero propagation delay
Switching speed: 4.5ns max.
Channel on capacitance: 9pF max. (3.3V operation)
V
CC
Operating Range: +2V to +3.6V
>100 MHz bandwidth
Package available: 40-pin BQSOP (B)
Product Description
Pericom Semiconductors PI3C series of bus switch circuits are
produced using the Companys advanced submicron CMOS
technology, achieving industry leading performance.
PI3C16226 is a 12-to 24-bit multiplexer/demultiplexer bus switch.
Industry leading advantages include a zero propagation delay of
500ps, resulting from 9-ohm channel resistance and low
I/O capacitance. A1 port demultiplexes to either 1B or 2B and the
switch is bidirectional.
Application
Provides Memory Module switching.
Logic Block Diagram
1A1
1B1
Pin Description
1
A
1
2
B
1
2
B
2
3
A
1
1B2
12A1
12B1
12B2
SEL
Function
nA
1
to nB
1
nA
1
to nB
2
SEL
L
H
GND
4
B
1
4
B
2
5
A
1
6
B
1
6
B
2
7
A
1
V
CC
8
B
1
8
B
2
9
A
1
10
B
1
10
B
2
11
A
1
12
B
1
12
B
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40-Pin
B
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
SEL
1
B
1
1
B
2
2
A
1
3
B
1
3
B
2
4
A
1
5
B
1
5
B
2
6
A
1
7
B
1
7
B
2
8
A
1
GND
9
B
1
9
B
2
10
A
1
11
B
1
11
B
2
12
A
1
1
PS8457D
03/13/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux 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 +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 condi-
tions above those indicated in the operational sec-
tions 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, T
A
= 40°C to +85°C, V
CC
= 3.3V ±10%)
Parame te rs
V
IH
V
IL
I
IH
I
IL
V
IK
I
O
D e s cription
Input HIGH Voltage
Input LO W Voltage
Input HIGH Current
Input LO W Current
Clamp Diode Voltage
B port pulldown Current
Te s t Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LO W Level
V
C C
= Max., V
IN
= V
C C
V
C C
= Max., V
IN
=
M in.
2.0
0.5
2.5
Typ.
(2)
0.73
3.8
9
16
M ax.
0.8
±1
±1
1.2
12
Units
V
µA
V
mA
GND
V
C C
= Min., I
IN
= 18mA
V
C C
= Min., V
O =
V
C C
SEL = High for B1
SEL = Low for B2
V
C C
= Min., V
IN
= 0.0V
I
O N
= 48mA or 64mA
V
C C
= Min., V
IN
= 2.4V
I
O N
= 15mA
R
O N
Switch O n Resistance
(4)
Ω
23
Capacitance
(T
A
= 25°C f = 1 MHz)
Parame te rs
(5)
C
IN
C
ON
D e s cription
Input Capacitance
A/B Capacitance, Switch O n
Te s t Conditions
V
IN
= 0V
Typ.
3.5
9.3
M ax.
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 V
CC
= 3.3V, 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 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.
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PS8457D
03/13/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
Power Supply Characteristics
Parame te rs
I
CC
∆I
CC
De s cription
Quiescent Power Supply Current
Supply Current per Input @ TTL HIGH
Te s t Conditions
(1)
V
CC
= Max., V
IN
= GND or V
CC
V
CC
= Max., V
IN =
3.0V
(3)
M in.
Typ.
(2)
260
M ax.
850
750
Units
µA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for applicable device.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3. Per TTL driven input (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.
PI3C16226 Switching Characteristics Over Operating Range
Parame te rs
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
De s cription
Propogation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
SEL to Ax or Bx
Bus Disable Time
SEL to Ax or Bx
Conditions
(1)
C
L
= 25pF
R
L
= 500
Ω
C
L
= 25pF
R
L
= 500
Ω
R = 500
Ω
Com.
M in.
1.3
1.3
M ax.
0.5
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 0.5ns 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.
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PS8457D
03/13/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
40-Pin BQSOP (B) Package
X.XX
X.XX
DENOTES DIMENSION IN MILLIMETERS
Notes:
1. Controlling dimensions in millimeters
2. Ref.: JEDEC MO - 154 BB
Ordering Information
Part
PI3C16226B
Pin - Pack age
40 - BQ SO P (B)
Te mpe rature
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
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PS8457D
03/13/01
51单片机
