PI5C16861
20-Bit, 2-Port Bus Switch
Features Description
Near-Zero propagation delay
Pericom Semiconductor s PI5C16861 is configured as a 20-bit,
2-port bus switch designed with a low On-Resistance (5) allowing
5 or 25 switches connect inputs to outputs
inputs to be connected directly to outputs. The bus switch creates no
Direct bus connection when switches are ON
additional propagational delay or additional ground bounce noise. The
32X384 function with flow through pinout make board layout
switches are turned ON by the Bus Enable (BEx) input signal.
easier
Ultra-low quiescent power (0.2A typical)
Pin Configuration
Ideally suited for notebook applications
Industrial operating temperature: 40C to +85C
NC 1 48 VCC
Packaging (Pb-free & Green): A0 2 47 BE1
48-pin 240-mil wide plastic TSSOP (A)
A1 3 46 B0
A2 4 45 B1
B2
Block Diagram A3 5 44
A4 6 43 B3
A5 B4
7 42
A0 B0
A6 8 41 B5
A7 B6
9 40
A8 10 39 B7
A9 B9
A9 B8
11 38
GND 12 37 B9
NC VCC
13 36
BE1
BE2
A10 14 35
A11 B10
15 34
A10 B10
B11
A12 16 33
A13 B12
17 32
A14 B13
18 31
A19 B19
A15 B14
19 30
A16 B15
20 29
A17 B16
21 28
BE2
A18 B17
22 27
B18
A19
23 26
GND B19
24 25
(1)
Truth Table
Function BEx A19-A0
Pin Description
Disconnect H Hi-Z
Pin Name Description
Connect L B19-B0
Note:
BEx Bus Enable Inputs (Active LOW)
1. H = High Voltage Level, L = Low Voltage Level,
A19-A0 Bus A
Hi-Z = High Impedance
B19-B0 Bus B
11-0008 PS7026H 10/11/10
1PI5C16861
20-Bit, 2-Port Bus Switch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Storage Temperature ............................................................. 65C to +150C
Stresses greater than those listed under MAXIMUM RAT-
Ambient Temperature with Power Applied ............................ 40C to +85C
INGS may cause permanent damage to the device. This is
a stress rating only and functional operation of the device
Supply Voltage to Ground Potential (Inputs & V Only) ...... 0.5V to +7.0V
CC
at these or any other conditions above those indicated in
Supply Voltage to Ground Potential (Outputs & D/O Only) ... 0.5V to +7.0V
the operational sections of this specification is not implied.
Exposure to absolute maximum rating conditions for ex-
DC Input Voltage ..................................................................... 0.5V to +7.0V
tended periods may affect reliability.
DC Output Current ................................................................................ 120mA
Power Dissipation .................................................................................... 0.5W
DC Electrical Characteristics (Over the Operating Range, T = 40C to +85C, V = 5V 10%)
A CC
(1) (2)
Parameters Description Test Conditions Min. Typ. Max. Units
V Input HIGH Voltage Guaranteed Logic HIGH Level 2.0
IH
V
V Input LOW Voltage Guaranteed Logic LOW Level 0.5 0.8
IL
I Input HIGH Current V = Max., V = V 1
IH CC IN CC
I Input LOW Current V = Max., V = GND 1
IL CC IN
A
High Impedance Output
I 0 A, B V 1
OZH CC
Current
V Clamp Diode Voltage V = Min., I = 18mA 0.7 1.2 V
IK CC IN
(3)
I Short Circuit Current A (B) = 0V, B (A) = V 100 mA
ON CC
Input Hysteresis at Con-
V 150 mV
H
trol Pins
V = Min., V = 0.0V 5 7
CC IN
(4)
R Switch On-Resistance
ON
V = Min., V = 2.4V 10 15
CC IN
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 = 5.0V, T = 25C ambient and maximum loading.
CC A
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.
Capacitance (T = 25C, f = 1 MHz)
A
(1)
Description Test Conditions Typ. Units
Parameters
C Input Capacitance 6
IN
C A/B Capacitance, Switch Off V = 0V 6 pF
OFF IN
C A/B Capacitance, Switch On 8
ON
Notes:
1. This parameter is determined by device characterization but is not production tested.
PS7026H 10/11/10
11-0008
2