Datasheet PI5C162861A, PI5C162861B, PI5C162861V, PI5C16861A, PI5C16861B Datasheet (PERICOM)
...Page 1
PI5C16861/162861
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20-Bit, 2-Port Bus Switch
PI5C162861 (25
PI5C16861
ΩΩ
Ω)
ΩΩ
20-Bit, 2-Port Bus Switch
Product Features
• 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
• Packages 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)
Logic Block Diagram
A
0
A
9
BE
1
A
10
A
19
BE
2
Truth Table
(1)
Function BEX A19-A0
Disconnect H Hi-Z
Connect L B19-B0
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
B
0
B
9
B
10
B
19
Product Description
Pericom Semiconductor’s PI5C series of BusSwitch circuits are
produced using the Company’s advanced submicron CMOS
technology, achieving industry leading speed.
The PI5C16861 is configured as a 20-bit, 2-port 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 25-ohm series resistor to
reduce noise resulting from reflections, thus eliminating the need
for an external terminating resistor.
Product Pin Configuration
NC
A
A
A
A
A
A
A
A
A
A
GND
NC
A
A
A
A
A
A
A
A
A
A
GND
1
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
9
10
11
48-Pin
A,V,B
8
9
12
13
10
14
11
15
12
16
13
17
14
18
15
19
16
20
17
21
18
22
19
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
VCC
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
VCC
BE
B
10
B
11
B
12
B
13
B
14
B
15
B
16
B
17
B
18
B
19
1
2
Product Pin Description
Pin Name Description
BEx Bus Enable Inputs (Active LOW)
A19-A0 Bus A
B19-B0 Bus B
1
PS7026C 09/18/96
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
PI5C16861/162861
20-Bit, 2-Port Bus Switch
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
Power Dissipation ................................................................................... 0.5W
DC Electrical Characteristics (Over the Operating Range, T
Parameters Description Test Conditions
V
V
I
IH
I
IL
I
OZH
V
I
ON
V
R
IH
IL
IK
H
ON
Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 — — V
Input LOW Voltage Guaranteed Logic LOW Level –0.5 — 0.8 V
Input HIGH Current VCC = Max., VIN = V
Input LOW Current VCC = Max., VIN = GND — — ±1 µA
High Impedance Output Current 0 ≤ A, B ≤ V
Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
Short Circuit Current
(3)
A (B) = 0V, B (A) = V
Input Hysteresis at Control Pins — 150 — mV
Switch On Resistance
(4)
VCC = Min., VIN = 0.0V, 16861 — 5 7 Ω
= –40°C to +85°C, V
A
(1)
CC
ION = 48mA 162861 20 28 40
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the devi ce.
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.
= 5V ±10%)
CC
(2)
Max. Units
CC
Min. Typ
——±1µA
——±1µA
CC
100 — — mA
VCC = Min., VIN = 2.4V, 16861 — 10 15 Ω
ION = 15mA 162861 20 35 48
Capacitance (T
Parameters
C
IN
C
OFF
C
ON
= 25°C, f = 1 MHz)
A
(5)
Description Test Conditions Typ Units
Input Capacitance VIN = 0V 6 pF
A/B Capacitance, Switch Off VIN = 0V 6 pF
A/B Capacitance, Switch On VIN = 0V 8 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 = 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.
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Power Supply Characteristics
Parameters Description Test Conditions
(1)
PI5C16861/162861
20-Bit, 2-Port Bus Switch
Min. Typ
(2)
Max. Units
I
CC
Quiescent Power VCC = Max. VIN = GND or V
CC
0.1 10 µA
Supply Current
∆I
CC
Supply Current per VCC = Max. VIN = 3.4V
(3)
2.5 mA
Input @ TTL HIGH
I
CCD
Supply Current per VCC = Max., 0.25 mA/
Input per MHz
(4)
A and B Pins Open MHz
BEX = GND
Control Input Toggling
50% Duty Cycle
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
Com.
Parameters Description Conditions
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
Propagation Delay
Ax to Bx, Bx to Ax RL = 500
Bus Enable Time 1.5 6.5 ns
BEX to Ax or Bx
Bus Disable Time 1.5 5.5 ns
BEx to Ax or Bx
(2,3)
CL = 50pF 0.25 ns
(1)
Min Max Unit
Ω
PI5C162861 Switching Characteristics over Operating Range
PI5C162861
Com.
Parameters Description Conditions
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
Propagation Delay
Ax to Bx, Bx to Ax RL = 500
Bus Enable Time 1.5 6.5 ns
BEX to Ax or Bx
Bus Disable Time 1.5 5.5 ns
BEx to Ax or Bx
(2,3)
CL = 50pF 1.25 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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
(1)
Min Max Unit
Ω
3
PS7026C 09/18/96
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