PRELIMINARY
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34X483/PI5C34X2483(25ohm)
40-Bit, 4-Port Bus Exchange Switch
PI5C34X483
PI5C34X2483(25ohm)
Product Features
Near-zero propagation delay
Low noise, 25ohm version (PI5C34X2483)
5ohm switches connect inputs to outputs (PI5C34X483)
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2 µA typical) Ideally
suited for notebook applications
Package available:
96-pin LFBGA (N96)
40-Bit, 4-Port Bus Exchange Switch
Product Description
Pericom Semiconductors PI5C series of logic circuits are produced
using the Companys advanced 0.8 micron CMOS technology,
achieving industry leading performance.
The PI5C34X483 and PI5C34X2483 are 40-bit, 4-port bus switch with
exchange designed with a low ON resistance 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 four Bus Enable (
N
BE) input signals, and four Bus
Exchange (BX) input signals offer nibble swapping of the AB and CD
pairs of signals. This exchange configuration allows byte swapping
of buses in systems. The PI5C34X2483 is designed with an internal
25ohm resistor reducing noise reflection in high-speed applications.
Logic Block Diagram
1
A
0
1
C
0
2
A
0
2
C
0
Truth Table
(1)
Function
Disconnect
Connect
Exchange
Note:
1. H
X
L
Hi-Z
=
=
=
=
N
BE
N
BX
N
A0
-
N
A4
N
B0
-
N
B
4
1
B
0
1
D
0
2
B
0
2
D
0
H
L
L
X
L
H
Hi-Z
C
0-C4
D
0-D4
Hi-Z
D
0-D4
C
0-C4
1
A
4
1
C
4
2
A
4
2
C
4
1
B
4
1
D
4
2
B
4
2
D
4
High Voltage Level
Dont Care
Low Voltage Level
High Impedance
1
BX
1
BE
3
A
0
3
C
0
2
BX
2
BE
4
A
0
4
C
0
Product Pin Description
Pin Name
N
A
0
3
B
0
3
D
0
4
B
0
4
D
0
De s cription
Bus A
Bus B
Bus Enable Pins (Active LOW)
Ground
Power
-
N
A
9
-
N
B
9
3
A
4
3
C
4
4
A
4
4
C
4
N
B
0
3
B
4
3
D
4
4
B
4
4
D
4
N
BE
N
GN D
3
BX
3
BE
4
BX
4
BE
N
V
CC
Note:
N
= 1 through 4 for each set of 10-bit buses
1
PSXXXX
05/20/99
PRELIMINARY
Product Pinout by Name
Name
1
A
0
1
B
0
1
C
0
1
D
0
1
A
1
1
B
1
1
C
1
1
D
1
1
A
2
1
B
2
1
C
2
1
D
2
1
A
3
1
B
3
1
C
3
1
D
3
1
A
4
1
B
4
1
C
4
1
D
4
1
BE
1
BX
1
V
CC
1
GN D
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34X483/PI5C34X2483(25ohm)
40-Bit, 4-Port Bus Exchange Switch
Ball Pad
A6
A5
B5
B4
A4
A3
B3
A2
B2
C5
A1
D1
D3
D4
D2
C3
D5
D6
C4
C2
B6
C1
C6
B1
Name
2
A
0
2
B
0
2
C
0
2
D
0
2
A
1
2
B
1
2
C
1
2
D
1
2
A
2
2
B
2
2
C
2
2
D
2
2
A
3
2
B
3
2
C
3
2
D
3
2
A
8
2
B
8
2
C
4
2
D
4
2
BE
2
BX
2
V
CC
2
GN D
Ball Pad Name
E6
E5
F5
F4
E4
E3
F3
E2
F2
G5
E1
H1
H3
H4
H2
G3
H5
H6
G4
G2
F6
G1
G6
F1
3
A
0
3
B
0
3
C
0
3
D
0
3
A
1
3
B
1
3
C
1
3
D
1
3
A
2
3
B
2
3
C
2
3
D
2
3
A
3
3
B
3
3
C
3
3
D
3
3
A
4
3
B
4
3
C
4
3
D
4
3
BE
3
BX
3
V
CC
3
GN D
Ball Pad
J6
J5
K5
K4
J4
J3
K3
J2
K2
L5
J1
M1
M3
M4
M2
L3
M5
M6
L4
L2
K6
L1
L6
K1
Name
4
A
0
4
B
0
4
C
0
4
D
0
4
A
1
4
B
1
4
C
1
4
D
1
4
A
2
4
B
2
4
C
2
4
D
2
4
A
3
4
B
3
4
C
3
4
D
3
4
A
4
4
B
4
4
C
4
4
D
4
4
B
E
4
B
X
4
V
CC
4
GN D
Ball Pad
N6
N5
P5
P4
N4
N3
P3
N2
P2
R5
N1
T1
T3
T4
T2
R3
T5
T6
R4
R2
P6
R1
R6
P1
2
PSXXXX
05/20/99
PRELIMINARY
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34X483/PI5C34X2483(25ohm)
40-Bit, 4-Port Bus Exchange Switch
Product Pinout [LFBGA(N96) Package]
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
1
C
8
1
GN D
1
B
X
1
D
2
2
C
2
2
GN D
2
B
X
2
D
2
3
C
2
3
GN D
3
B
X
3
D
2
4
C
2
4
GN D
4
B
X
4
D
2
2
1
D
1
1
A
2
1
D
4
1
C
3
2
D
1
2
A
2
2
D
4
2
C
3
3
D
1
3
A
2
3
D
4
3
C
3
4
D
1
4
A
2
4
D
4
4
C
3
3
1
B
1
1
C
1
1
D
3
1
A
3
2
B
1
2
C
1
2
D
3
2
A
3
3
B
1
3
C
1
3
D
3
3
A
3
4
B
1
4
C
1
4
D
3
4
A
3
4
1
A
1
1
D
0
1
C
4
1
B
3
2
A
1
2
D
0
2
C
4
2
B
3
3
A
1
3
D
0
3
C
4
3
B
3
4
A
1
4
D
0
4
C
4
4
B
3
5
1
B
0
1
C
0
1
B
2
1
A
4
2
B
0
2
C
0
2
B
2
2
A
4
3
B
0
3
C
0
3
B
2
3
A
4
4
B
0
4
C
0
4
B
2
4
A
4
6
1
A
0
1
B
E
1
V
CC
1
B
4
2
A
0
2
BE
2
V
CC
2
B
4
3
A
0
3
B
E
3
V
CC
3
B
4
4
A
0
4
B
E
4
V
CC
4
B
4
Product Pin Assignment (Top View)
3
PSXXXX
05/20/99
PRELIMINARY
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34X483/PI5C34X2483(25ohm)
40-Bit, 4-Port Bus Exchange 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 +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 ......................................................................... 120 mA
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, T
A
= 40°C to +85°C, V
CC
= 5V ±5%)
Parameters Description
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
I
OS
V
H
R
ON
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circuit Current
(3)
Input Hysteresis at Control Pins
Switch On Resistance
(4)
V
CC
= Min., V
IN
= 0.0V,
I
ON
= 48mA
V
CC
= Min., V
IN
= 2.4V,
I
ON
= 15mA
PI5C34X483
PI5C34X2483
PI5C34X483
PI5C34X2483
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0
≤
AB, CD
≤
V
CC
V
CC
= Min., I
IN
= 18mA
AB (CD) = 0V, CD (AB) = V
CC
Min.
2.0
0.5
100
18
18
Typ
(2)
0.7
150
5
28
10
35
Max.
0.8
±1
±1
±1
1.2
7
40
15
48
V
mA
mV
µA
Units
V
ohm
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(5)
C
IN
C
OFF
C
ON
Description
Input Capacitance
AB/CD Capacitance, Switch Off
AB/CD Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
V
IN
= 0V
Typ
3.5
5
10
Max.
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 = 5.0V, 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 AB and CD pin at indicated current through the switch. ON resistance is determined by the
lower of the voltages on the two (A or B, C or D) pins.
5. This parameter is determined by device characterization but is not production tested.
4
PSXXXX
05/20/99
PRELIMINARY
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34X483/PI5C34X2483(25ohm)
40-Bit, 4-Port Bus Exchange Switch
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
AB and CD Pins Open
BE = GND
Control Input Toggling
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND or V
CC
V
IN
= 3.4V
(3)
Min.
Typ
(2)
0.1
Max.
3.0
2.5
0.25
Units
µA
mA
mA/
MHz
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 (V
IN
= 3.4V, control inputs only); A, B, C, and D 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, B, C, and D inputs generate no significant AC or DC currents as they transition. This parameter is not tested,
but is guaranteed by design.
PI5C34X483 Switching Characteristics over Operating Range
PI5C34X483
Com
Typ
Max.
0.25
6.5
5.5
6.5
ns
Parameters Description
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
BX
Propagation Delay
(2,3)
Ax to Cx, Bx to Dx
Bus Enable Time
BE to Cx or Dx
Bus Disable Time
BE to Cx or Dx
Bus Exchange Time
BX to Cx or Dx
Conditions
(1)
C
L
= 50 pF
R
L
= 500ohm
Min.
1.5
1.5
1.5
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 0.25ns 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.
5
PSXXXX
05/20/99
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