Datasheet PI5A121CX, PI5A121TX, PI5A122CX, PI5A122TX, PI5A124TX Datasheet (PERICOM)

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2

PI5A121/PI5A122/PI5A124

Wide Bandwidth Analog Switches

Features

• Single-Supply Operation (+2V to +6V)

• Rail-to-Rail Analog Signal Dynamic Range

• Low ON-Resistance (6-Ohm typ. with 5V supply)
Minimizes Distortion and Error Voltages

• On-Resistance Flatness, 3-Ohm typ.

• Low Charge Injection Reduces Glitch Errors. Q = 4pC typ.

• High Speed. t

= 10ns typ.

ON

• Wide -3dB Bandwidth: 326 MHz (typ.)

• High-Current Channel Capability: >100mA

• TTL/CMOS Logic Compatible

• Low Power Consumption (0.5µW typ)

• Small outline transistor package minimizes board area

- 65mil Wide SOT23-5 (T) for PI5A121/PI5A122

- 65mil Wide SOT23-6 (T) for PI5A124

- 50mil Wide SC70-5 (C) for PI5A121/PI5A122

Applications

• Audio, Video Switching, and Routing

• Battery-Powered Communication Systems

• Computer Peripherals

• Telecommunications

• Portable Instrumentation

• Mechanical Relay Replacement

• Cell Phones

• PDAs

Description

The PI5A121/PI5A122/PI5A124 are analog switches designed
for single-supply operation. These high-precision devices are
ideal for low-distortion audio, video, signal switching and routing.

The PI5A121 is a single-pole throw (SPST) normally open (NO)
switch. The switch is open when IN is LOW. The PI5A122 is
a single-pole single-throw (SPST) normally closed (NC) switch.

Each switch conducts current equally well in either direction
when on. When off, they block voltages up to V+.

These switches are fully specified with +5V, and +3.3V supplies.
With +5V, they guarantee <10-ohm ON-resistance. ON-resistance
matching between channels is within 2ohms. ON-resistance flat­ness is less than 5ohms over the specified range. These switches
also guarantee fast switching speeds (tON <20ns).

These products are available in 5-pin SC70 and/or 6-pin SOT23
plastic packages for operation over the industrial (-40oC to +85oC)
temperature range.

Functional Diagrams, Pin Configurations and T ruth T ables

PI5A121 PI5A122 PI5A124

1

COM

NO

2

3

GND IN

SOT23-5

SC70-5

Top View

NI121A5IP221A5IP

0FFONO
1NOFO

5

V+

4

1

COM IN

NC

2

3

GND IN

SOT23-5

SC70-5

Top View

Switches shown for Logic “0” input

1

5

V+

4

V+

GND

1

2

3

SOT23-6

Top View

cigoLCNON

0NOFFO
1FFONO

6

NO

5

COM

4

NC

421A5IP

PS8203D 01/12/01

2

PI5A121/PI5A122/PI5A124

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Wide Bandwidth Analog Switch

Absolute Maximum Ratings

Voltages Referenced to Gnd

V+............................................................................ -0.5V to +7V

VIN, V
or 30mA, whichever occurs first

Current (any terminal) ..................................................... ±25mA

Peak Current, COM, NO, NC

(Pulsed at 1ms, 10% duty cycle)..................................... ±25mA

, VNC, VNO (Note 1).......................-0.5V to VCC +2V

COM

Thermal Information

Continuous Power Dissipation

SOT23-6 (derate 7mW/ºC above +70ºC) .............................550mW

Storage Temperature .......................................... -65ºC to +150ºC

Lead Temperature (soldering, 10s) .................................. +300ºC

Note 1:
Signals on NC, NO, COM, or IN exceeding V+ or Gnd are clamped
by internal diodes. Limit forward diode current to 30mA.

Caution: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating
and operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied.

Electrical Specifications - Single +5V Supply

(V+ = +5V ± 10%, GND = 0V, V

retemaraPlobmySsnoitidnoC.pmeT )C°( .niM

hctiwSgolanA

)3(

egnaRlangiSgolanA

ecnatsiseRnOR

hctaMecnatsiseR-nO

)4(

slennahCneewteB

= 2.4V, V

INH

V

∆R

= 0.8V)

INL

)1(

GOLANA

lluF0 V+V

)2(

.pyT

)1(

.xaM

stinU

522.701

NO

V+ I,V5.4=

V

ON

NO

MOC

Vro

CN

,Am03-=

V5.2+=

lluF21

522.02

Ω

lluF4

)5(

V+ ,V5=

ssentalFecnatsiseR-nO

egakaeLffOCNroON

)6(

tnerruC

egakaeLffOMOC

)6(

tnerruC

egakaeLnOMOC

)6(

tnerruC

R

I

)NO(TALF

ro

)FFO(ON

I

)FFO(CN

I

)FFO(MOC

I

)NO(MOC

V

ON

V+ V,V5.5=

V

V+ V,V5.5=

I

MOC

Vro

CN

V

Vro

ON

1=V4,V5.2,V

CN

,Am03-=

,V0=

MOC

V5.4=

V+ ,V5.5=

V,V5.4+=

MOC

V

CN

V

ON

MOC

Vro

CN

ro

ON

V0±=

V5.4+=

V5.4+=

2

5227.25.3

lluF4

5281.0

lluF08-08

5202.0
An

lluF08-08

5202.0

lluF08-08

PS8203D 01/12/01

2

PI5A121/PI5A122/PI5A124

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Wide Bandwidth Analog Switch

Electrical Specifications - Single +5V Supply (continued)

(V+ = + 5V ± 10%, GND = 0V, V

retemaraPlobmySsnoitidnoCpmeT )Cº( .niM

tupnIcigoL

INH

= 2.4V, V

INL

= 0.8V)

)1(

)2(

.pyT

)1(

.xaM

stinU

egatloVhgiHtupnIV

egatloVwoLtupnIV

hgiHegatloVhtiwtnerruCtupnII

woLegatloVhtiwtnerruCtupnII

HI

LI

HNI

LNI

V

NI

V

NI

cimanyD

emiTnO-nruTt

emiTffO-nruTt

)3(

noitcejnIegrahC

noitalosIffORRIO

)8(

klatssorC

NO

V

CC

FFO

1=n V,F

C

Q

L

R

NEG

R

L

f= 3erugiF,zHM01

R

X

KLAT

L

f= 4erugiF,zHM01

leveLhgiHcigoldeetnarauG

2

V

leveLwoLcigoldeetnarauG8.0

lluF

,V4.2=srehtollaV8.0=1-500.01

µA

,V8.0=srehtollaV4.2=1-500.01

52751

lluF02

1erugiF,V5=

5217

lluF01

,V0=

NEG

0= Ω,erugiF2

05= Ω C,

05= Ω C,

5=p,F

L

5=p,F

L

52

6.101Cp

34-

34-

sn

Bd

ecnaticapaCONroCNC

)FFO(

5.5

f= 5erugiF,zHk1

)FFO(MOC

ecnaticapaCnOMOCC

)NO(MOC

htdiwdnaBBd3-WBR

f= 6erugiF,zHk131

05= Ω F,erugi7 lluF623zHM

L

5.5

ylppuS

egnaRylppuS-rewoP+V

26V

lluF

tnerruCylppuSevtisoP+IV

CC

V,V5.5=

=+VroV01

NI

µA

Notes:

1 . The algebraic convention, where most negative value is a minimum and most positive is a maximum, is used in this data sheet.
2 . Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.

3. Guaranteed by design

4. ∆R

ON = RON

max - R

ON

min
5 . Flatness is defined as the difference between the maximum and minimum value of on-resistance measured.
6 . Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25ºC.
7 . Off Isolation = 20log10 [ V

/ (VNO or VNC) ]. See Figure 3.

COM

8 . Between any two switches. See Figure 4.

3

PS8203D 01/12/01

FpecnaticapaCffOMOCC

2

PI5A121/PI5A122/PI5A124

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Wide Bandwidth Analog Switch

Electrical Specifications - Single +3.3V Supply

(V+ = +3.3V ± 10%, GND = 0V, V

retemaraPlobmySsnoitidnoCpmeT.)Cº(niM.

hctiwSgolanA

)3(

egnaRlangiSgolanA

V

INH

= 2.4V, V

GOLANA

INL

= 0.8V)

)1(

pyT.

)2(

xaM.

)1(

0+VV

stinU

ecnatsiseR-nOR

hctaMecnatsiseR-nO

)4(

slennahCneewteB

∆R

NO

NO

V,V3.3=+I

ecnatsiseR-nO

)5,3(

ssentalF

R

)NO(TALF

cimanyD

emiTnO-nruTt

emiTffO-nruTt

)3(

noitcejnIegrahC

NO

FFO

Q

ylppuS

tnerruCylppuSevtisoP+I

V+ V6.3=

V,V3=+I

V

ON

V

ON

roV

C

L

R

MOC

roV

CN

MOC

roV

CN

CN

1=n V,F

0=V, erugiF2

NEG

=+VroV0

,VNI

03-=m,A

V5.1=

03-=m,A

V5.2,V8.0=

V,V3.3=+V

ON

,V5.1=erugiF1

,V0=

NEG

fforonoslennahCllA

522181

lluF22

5211

Ω

lluF2

525.04
lluF5

525152

lluF04

sn

525.121
lluF02

523.101Cp

lluF1µA

tupnIcigoL

egatloVhgiHtupnIV
egatloVwoLtupnIV

tnerruChgiHtupnII
tnerruCwoLtupnII

HI

LI

HNI

LNI

V

NI

V

NI

levelhgihcigoldeetnarauGlluF2 V

levelwolcigoldeetnarauGlluF8.0V

V8.0=srehtolla,V4.2=lluF1-1µA
V4.2=srehtolla,V8.0=lluF1-1µA

4

PS8203D 01/12/01

2

PI5A121/PI5A122/PI5A124

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Wide Bandwidth Analog Switch

Test Circuits/Timing Diagrams

Ω

Figure 1. Switching Time

Figure 2. Charge Injection

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PS8203D 01/12/01

2

PI5A121/PI5A122/PI5A124

Ω

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Wide Bandwidth Analog Switch

Test Circuits/Timing Diagrams (continued)

Figure 3. Off Isolation

Figure 5. Channel-Off Capacitance

Figure 4. Crosstalk (124 only)

Figure 6. Channel-On Capacitance

Ordering Information

N/PegakcaP

XT121A5IP5-32TOS
XT221A5IP5-32TOS
XT421A5IP6-32TOS
XC121A5IP5-07CS
XC221A5IP5-07CS

Figure 7. Bandwidth

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax [phone] • http://www.pericom.com

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PS8203D 01/12/01