ETC PI3C16225A

PI3C16226
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3.3V, High-Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
Product Features
Product Description
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Pericom Semiconductor’s PI3C series of bus switch circuits are
produced using the Company’s advanced submicron CMOS
technology, achieving industry leading performance.
RON 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)
VCC Operating Range: +2V to +3.6V
>100 MHz bandwidth
Package available: 40-pin BQSOP (B)
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
Pin Description
1B1
1A1
1A1
2B1
2B2
3A1
GND
4B1
4B2
5A1
6B1
6B2
7A1
V CC
8B1
8B2
9A1
10 B 1
10 B 2
11 A 1
12 B 1
12 B 2
1B2
12B1
12A1
12B2
SEL
Function
SEL
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
40-Pin
B
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
SEL
1B 1
1B 2
2A 1
3B 1
3B 2
4A 1
5B 1
5B 2
6A 1
7B 1
7B 2
8A 1
GND
9B 1
9B 2
10A 1
11B 1
11B 2
12A 1
PS8457D
03/13/01
PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus 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 (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
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)
D e s cription
M in.
Typ.(2)
M ax.
Units
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
—
—
VIL
Input LO W Voltage
Guaranteed Logic LO W Level
–0.5
—
0.8
IIH
Input HIGH Current
VC C = Max., VIN = VC C
—
—
±1
IIL
Input LO W Current
VC C = Max., VIN
GND
—
—
±1
VIK
Clamp Diode Voltage
VC C = Min., IIN = –18mA
—
–0.73
–1.2
V
B port pulldown Current
VC C = Min., VO = VC C
SEL = High for B1
SEL = Low for B2
2.5
3.8
—
mA
VC C = Min., VIN = 0.0V
IO N = 48mA or 64mA
—
9
12
VC C = Min., VIN = 2.4V
IO N = 15mA
—
IO
RO N
Switch O n
Resistance(4)
=
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
PS8457D
03/13/01
PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
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Power Supply Characteristics
Parame te rs
De s cription
Te s t Conditions (1)
M in.
Typ.(2)
M ax.
Units
µA
ICC
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
—
260
850
∆ICC
Supply Current per Input @ TTL HIGH
VCC = Max., VIN = 3.0V(3)
—
—
750
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for 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.
PI3C16226 Switching Characteristics Over Operating Range
Parame te rs
De s cription
Conditions (1)
tPLH
tPHL
Propogation Delay(2,3)
Ax to Bx, Bx to Ax
CL = 25pF
RL = 500Ω
tPZH
tPZL
Bus Enable Time
SEL to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
SEL to Ax or Bx
CL = 25pF
RL = 500Ω
R = 500Ω
Com.
M in.
M ax.
—
0.5
1.3
6.5
1.3
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 0.5ns 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
PS8457D
03/13/01
PI3C16226
3.3V, High Bandwidth, 12-Bit to 24-Bit,
Mux/Demux Bus Switch
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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
Pin - Pack age
PI3C16226B
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
4
PS8457D
03/13/01