Datasheet PI5C3400P, PI5C3400Q, PI5C3400S Datasheet (PERICOM)

PI5C3400

4-BIT, 4-PORT BUS

EXCHANGE SWITCH

191

PS8191 05/07/98

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Logic Block Diagram

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PI5C3400

4-Bit, 4-Port Bus Exchange Switch

Product Description:

Pericom Semiconductor’s PI5C series of logic circuits are pro­duced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.

The PI5C3400 is a 4-bit, 4-port bus switch with individual exchanges
designed with a low ON resistance (5Ω) allowing inputs to be
connected directly to outputs. The bus switch creates no additional
propagational delay or ground bounce noise. The switches are
turned ON by the Bus Enable (BE) input signal, and the Bus
Exchange (BX0–BX3) input signals offer individual bit swapping
of the AB and CD signal pairs. This exchange configuration allows
bit swapping of buses in systems.

Product Features:

• Zero propagation delay

• Zero ground bounce in flow-through mode

•5Ω switches connect inputs to outputs

• Direct bus connection when switches are ON

• Ultra Low Quiescent Power (0.2 µA Typical)
– Ideally suited for notebook applications

• Packages available:
– 24-pin 300 mil wide plastic PDIP (P)
– 24-pin 150 mil wide plastic QSOP (Q)
– 24-pin 300 mil wide plastic SOIC (S)

BX

0

B

0

A

0

D

0

C

0

BE

BX

1

BX

2

BX

3

B

1

A

1

D

1

C

1

B

2

A

2

D

2

C

2

B

3

A

3

D

3

C

3

Function BE BX0 BX1 BX2 BX3 A0–3 B0–3

Disconnect HXXXXHi-Z Hi-Z
Connect L BXi = L C0–3 D0–3
Exchange L BXi = H D0–3 C0–3

Note:

1. H = High Voltage Level
X = Don’t Care
L = Low Voltage Level
Hi-Z = High Impedance

i = 0, 1, 2, or 3

Truth Table

(1)

Product Pin Configuration

1
2
3
4
5
6
7
8
9
10
11
12

24
23
22
21
20
19
18
17
16
15
14
13

BE

C

0

A

0

B

0

D

0

C

1

A

1

B

1

D

1

BX

0

BX

1

GND

Vcc
D

3

B

3

A

3

C

3

D

2

B

2

A

2

C

2

NC
BX

3

BX

2

24-PIN

P

Q

S

192

PS8191 05/07/98

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PI5C3400

4-BIT, 4-PORT BUS

EXCHANGE 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 ............................................................................... 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, TA = –40°C to +85°C, VCC = 5V ±5%)

Parameters Description Test Conditions

(1)

Min. Ty p

(2)

Max. Units

VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V
VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8 V
IIH Input HIGH Current VCC = Max., VIN = VCC ±1 µA
IIL Input LOW Current VCC = Max., VIN = GND ±1 µ A
IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ±1 µA
VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA –0.7 –1.2 V
IOS Short Circuit Current

(3)

A (B) = 0V, B (A) = VCC 100 m A
VH Input Hysteresis at Control Pins 15 0 mV
RON Switch On Resistance

(4)

VCC = Min., VIN = 0.0V, ION = 48 mA 5 7 Ω

VCC = Min., VIN = 2.4V, ION = 15 mA 10 15

Capacitance (TA = 25°C, f = 1 MHz)

Parameters

(5)

Description Test Conditions Typ Max. Units

CIN Input Capacitance VIN = 0V 6 pF
COFF A/B Capacitance, Switch Off VIN = 0V 6 pF

CON 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.

Maximum Ratings

(Above which the useful life may be impaired. For user guidelines, not tested.)

Product Pin Description

Pin Name Description

BE Bus Enable Input (Active LOW)
Ax, Bx, Cx, Dx Bus A, Bus B, Bus C, Bus D
BX0 Bus Exchange (Bit 0)
BX1 Bus Exchange (Bit 1)
BX2 Bus Exchange (Bit 2)
BX3 Bus Exchange (Bit 3)
NC No Connect
GND Ground
VCC Power

PI5C3400

4-BIT, 4-PORT BUS

EXCHANGE SWITCH

193

PS8191 05/07/98

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Power Supply Characteristics

Parameters Description Test Conditions

(1)

Min. Typ

(2)

Ma x. Units

ICC Quiescent Power VCC = Max. VIN = GND or VCC 0.1 3.0 µA

Supply Current

∆ICC Supply Current per VCC = Max. VIN = 3.4V

(3)

2.5 mA

Input @ TTL HIGH

ICCD Supply Current per VCC = Max., 0.25 mA/

Input per MHz

(4)

A and B Pins Open MHz
BE = 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.

Switching Characteristics over Operating Range

PI5C3400

Com.

Parameters Description Conditions

(1)

Min. Max. Unit

tPLH Propagation Delay

(2,3)

CL = 50 pF 0.25 ns

t

PHL Ax to Cx, Bx to Dx RL = 500Ω

tPZH Bus Enable Time 1.5 6.5 ns
t

PZL BE to Cx or Dx

t

PHZ Bus Disable Time 1.5 5.5 ns

t

PLZ BE to Cx or Dx

t

BX Bus Exchange Time 1.5 6.5 ns

BX

X to Cx or Dx

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 0.25 ns for 50 pF 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 [phone] • http://www.pericom.com