Philips CBTS3257 Technical data

CBTS3257

INTEGRATED CIRCUITS

CBTS3257

Quad 1-of-2 multiplexer/demultiplexer with Schottky diode

Product data

2002 Sep 27

P s

on o s

Philips Semiconductors	Product data

Quad 1-of-2 multiplexer/demultiplexer

CBTS3257

with Schottky diode

FEATURES

•5 Ω switch connection between two ports

•TTL-compatible input levels

•Schottky diodes on I/O clamp undershoot

•Minimal propagation delay through the switch

•Latch-up protection exceeds 500 mA per JESD78

•ESD protection exceeds 2000 V HBM per JESD22-A114,

200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

DESCRIPTION

The CBTS3257 is a quad 1-of-2 high-speed TTL-compatible multiplexer/demultiplexer. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise.

Output Enable (OE) and select-control (S) inputs select the appropriate B1 and B2 outputs for the A-input data.

Internal Schottky diode provides I/O undershoot protection.

The CBTS3257 is characterized for operation from ±40 to +85 °C.

PIN CONFIGURATION

					VCC
S	1		16
1B1	2		15		OE
1B2	3		14		4B1
1A	4		13		4B2
2B1	5		12		4A
2B2	6		11		3B1
2A	7		10		3B2
GND	8		9		3A
		SA00533

PIN DESCRIPTION

	PIN NUMBER	SYMBOL			NAME AND FUNCTION
	1		S		Select-control input
	2, 3,	1B1, 1B2,
	5, 6,	2B1, 2B2			B outputs
	10, 11,	3B1, 3B2
	13, 14	4B1, 4B2
	4, 7, 9, 12	1A, 2A, 3A, 4A			A inputs
	8	GND			Ground (0 V)
	15				Output enable
			OE
	16	VCC			Positive supply voltage

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE	ORDER CODE	TOPSIDE MARK	DWG NUMBER
16-pin plastic SO	±40 to 85 °C	CBTS3257D	CBTS3257D	SOT109-1
16-pin plastic SSOP	±40 to 85 °C	CBTS3257DB	CS3257	SOT338-1
16-pin plastic SSOP (QSOP)	±40 to 85 °C	CBTS3257DS	CBS3257	SOT519-1
16-pin plastic TSSOP	±40 to 85 °C	CBTS3257PW	CBS3257	SOT403-1

Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.

2002 Sep 27

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	Philips Semiconductors	Product data
	Quad 1-of-2 multiplexer/demultiplexer	CBTS3257
	with Schottky diode

LOGIC DIAGRAM (positive logic)

4	2
1A	1B1
	3
	1B2
7	5
2A	2B1
	6
	2B2
9	11
3A	3B1
	10
	3B2
12	14
4A	4B1
	13
	4B2

1

S

15

OE

FUNCTION TABLE

		INPUTS		FUNCTION
	OE		S
	L		L	A port = B1 port
	L		H	A port = B2 port
	H		X	Disconnect

SA00532

2002 Sep 27

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Philips Semiconductors Product data

Quad 1-of-2 multiplexer/demultiplexer					CBTS3257
with Schottky diode
ABSOLUTE MAXIMUM RATINGS1
SYMBOL	PARAMETER		CONDITIONS	RATING		UNIT
VCC	DC supply voltage			±0.5 to +7.0		V
VI	DC input voltage2			±0.5 to +7.0		V
	Continuous channel current			128		mA
IK	Input clamp current		VI/O < 0	±50		mA
Tstg	Storage temperature range			±65 to +150		°C

NOTES:

1.Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

2.The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

RECOMMENDED OPERATING CONDITIONS

SYMBOL	PARAMETER		LIMITS		UNIT
		MIN		MAX
VCC	DC supply voltage	4.5		5.5	V
VIH	High-level input voltage	2.0		Ð	V
VIL	Low-level Input voltage	Ð		0.8	V
Tamb	Operating free-air temperature range	±40		+85	°C
NOTE:

1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.

DC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

Tamb = ±40 to +85 °C

UNIT

MIN

TYP1

MAX

VIK

Input clamp voltage

A or B inputs

VCC = 4.5 V; II = ±18 mA

Ð

Ð

±0.8

V

Control inputs

Ð

Ð

±1.2

V

VP

Pass voltage

VI = VCC = 5.0 V; I/O = ±100 mA

3.4

3.6

3.9

V

II

Input leakage current

VCC = 5.5 V; VI = GND or 5.5 V

Ð

Ð

±1

μA

ICC

Quiescent supply current

VCC = 5.5 V; IO = 0, VI = VCC or GND

Ð

Ð

3

μA

I

Additional supply current per input pin2

VCC = 5.5 V, one input at 3.4 V,

Ð

Ð

2.5

mA

CC

other inputs at VCC or GND

CI

Control pins capacitance

VI= 3 V or 0

Ð

3.3

Ð

pF

CIO(OFF)

Off capacitance

A port

VO = 3 V or 0;

OE

= VCC

Ð

9.9

Ð

pF

B port

VO = 3 V or 0; OE = VCC

Ð

6.4

Ð

pF

VCC = 4.5 V; VI = 0V; II = 64 mA

Ð

5

7

Ω

r

on

3

On-resistance

V

= 4.5 V; V

I

= 0V; I

I

= 30 mA

Ð

5

7

Ω

CC

VCC = 4.5 V; VI = 2.4 V; II = 15 mA

Ð

10

15

Ω

NOTES:

1.All typical values are at VCC = 5 V, Tamb = 25 °C.

2.This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND

3.Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. On-state resistance is determined by the lowest voltage of the two (A or B) terminals.

2002 Sep 27

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