PERIC PI3B16212, PI3B162212 Datasheet

	PI3B16212
	PI3B162212 (25Ω)
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3.3V, 24-Bit Bus Exchange Switch

Product Features

•Near-zero propagation delay

•5 Ω switches connect inputs to outputs

•Direct bus connection when switches are ON

•Fast Switching Speed - 5ns (max.)

• V CC Operating Range: 3.0V to 3.6V

•Industrial operating temperature: –40°C to +85°C

•Packages available:

–56-pin 240-mil wide thin plastic TSSOP (A)

–56-pin 300-mil wide plastic SSOP (V)

Logic Block Diagram

ONE OF TWELVE CHANNELS

1A1				1B1

1A2

1B2

FLOW CONTROL

S0

S1

S2

Truth Table

Function	S2	S1	S0	A1	A2
Disconnect	L	L	L	Z	Z
A1 to B1	L	L	H	B1	Z
A1 to B2	L	H	L	B2	Z
A2 to B1	L	H	H	Z	B1
A2 to B2	H	L	L	Z	B2
Disconnect	H	L	H	Z	Z
A1 to B1, A2 to B2	H	H	L	B1	B2
A1 to B2, A2 to B1	H	H	H	B2	B1

Note:

1.H = High Voltage Level L = Low Voltage Level Z = High Impedance

Product Description

Pericom Semiconductor’s PI3B series of logic circuits are produced in the Company’s advanced 0.35 micron CMOS technology.

The PI3B16212 and PI3B162212 are 3.3 volt, 24-bit bus exchange switches designed with a low ON resistance allowing inputs to be connected directly to outputs. The devices operate as a 24-bit bus switch or as a 12-bit exchanger, providing data exchange between the four signal ports via the data select pins (S0-S2).

The PI3B162212 device has a built-in 25-ohm series resistor to reduce noise due to reflections, thus eliminating the need for an external terminating resistor.

Product Pin Configuration

	S0		1		56		S1
1A1			2		55		S2
1A2			3		54		1B1
2A1			4		53		1B2
2A2			5		52		2B1
3A1			6		51		2B2
3A2			7		50		3B1
GND			8	56-PIN	49		GND
4A1			9		48		3B2
4A2			10	A, V	47		4B1
5A1			11		46		4B2
5A2			12		45		5B1
6A1			13		44		5B2
6A2			14		43		6B1
7A1			15		42		6B2
7A2			16		41		7B1
VCC			17		40		7B2
8A1			18		39		8B1
GND			19		38		GND
8A2			20		37		8B2
9A1			21		36		9B1
9A2			22		35		9B2
10	1		23		34		10B1
	A
10	2		24		33		10B2
	A
11A1		25			32		11B1
11A2		26			31		11B2
12A1		27			30		12B1
12A2		28			29		12B2

Product Pin Description

Pin Name	I/O	Description
S0-S2	I	Select Inputs
xAx	I/O	Bus A
xBx	I/O	Bus B

1	PS8180A	11/09/98

PI3B16212/162212

3.3V, 24-Bit Bus-Exchange Switch

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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 Range ..............................................	–0.5V to +4.6V
DC Input Voltage .....................................................	–0.5V to +4.6V
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, V CC = 3.0V to 3.6V)

Parameters	Description	Test Conditions(1)				Min.	Typ(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
II	Input Current	VCC = Max., VIN = VCC or GND				—	—	±1	µA
		VCC = 0, VIN = VCC				—	—	10	µA
IOZH	High Impedance Output Current	0 ≤ A, B ≥ VCC, Switches Off				—	—	±1	µA
VIK	Clamp Diode Voltage	VCC = Min., IIN = –18mA					–0.7	–1.2	V
RON	Switch On Resistance(3)	VCC = Min., VIN = 0.0V,			16212	—	5	8	Ω
		ION = 64mA			162212	20	28	40
		VCC = Min., VIN = 2.4V,			16212	—	10	15	Ω
		ION = 15mA			162212	20	35	48

Capacitance (TA = 25°C, f = 1 MHz)

Parameters(4)	Description	Test Conditions	Typ.	Units
CIN	Input Capacitance	VIN = 0V	3.0	pF
COFF	A/B Capacitance, Switch Off	VIN = 0V	14.0	pF
CON	A/B Capacitance, Switch On	VIN = 0V	30.0	pF

Notes:

1.For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2.Typical values are at Vcc = 3.3V, TA = 25°C ambient and maximum loading.

3.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.

4.This parameter is determined by device characterization but is not production tested.

2	PS8180A	11/09/98