Philips CBT3245A Technical data

CBT3245A

INTEGRATED CIRCUITS

CBT3245A

Octal bus switch

Product data

2003 Jun 27

Supersedes data of 2002 Feb 18

Philips

Semiconductors

Philips Semiconductors	Product data
Octal bus switch	CBT3245A

FEATURES

•Standard ’245-type pinout

•5 Ω switch connection between two ports

•TTL compatible control input levels

•Package options include plastic small outline (D), shrink small outline (DB), thin shrink small outline (TSSOP)

•Latch-up protection exceeds 500 mA per JESD78

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

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

DESCRIPTION

The CBT3245A provides eight bits of high-speed TTL-compatible bus switching in a standard ’245 device pinout. The low on-state resistance of the switch allows connections to be made with minimal propagation delay.

The CBT3245A device is organized as one 8-bit switch. When enable (OE) is LOW, the switch is on and port A is connected to port B. When OE is HIGH, the switch is open and a high-impedance state exists between the two ports.

The CBT3245A is characterized for operation from -40 to +85 °C.

PIN CONFIGURATION — SO, SSOP, QSOP, AND TSSOP

NC	1	20	VCC
A1	2	19
			OE
A2	3	18	B1
A3	4	17	B2
A4	5	16	B3
A5	6	15	B4
A6	7	14	B5
A7	8	13	B6
A8	9	12	B7
GND	10	11	B8

SA00507

Figure 1. Pin configuration — SO, SSOP, QSOP, and TSSOP

PIN CONFIGURATION — DHVQFN

		NC	VCC
		1	20
A1	2	**	19	OE
A2	3		18	B1
A3	4		17	B2
A4	5		16	B3
		GND*
A5	6		15	B4
A6	7		14	B5
A7	8		13	B6
A8	9		12	B7
		10	11

GND B8

* THE DIE SUBSTRATE IS ATTACHED TO THIS PAD USING CONDUCTIVE DIE ATTACH MATERIAL. IT CANNOT BE USED AS A SUPPLY PIN OR INPUT.

** PIN 1 INDICATION DOT

SA00649

Figure 2. Pin configuration — DHVQFN (top view)

PIN DESCRIPTION

	PIN NUMBER	SYMBOL			NAME AND FUNCTION
	1		NC		No internal connection
	19				Output enable input
			OE
	2, 3, 4, 5, 6, 7, 8, 9	A1-A8			Inputs
	18, 17, 16, 15, 14,	B1-B8			Outputs
	13, 12, 11
	10	GND			Ground (0V)
	20	VCC			Positive supply voltage

ORDERING INFORMATION

PACKAGES	TEMPERATURE RANGE		ORDER CODE	TOPSIDE MARK	DWG NUMBER
20-Pin Plastic DHVQFN	-40 to 85 °C		CBT3245ABQ	CT3245A	SOT764-1
20-Pin Plastic TSSOP	-40	to 85 °C	CBT3245APW	CT3245A	SOT360-1
20-Pin Plastic SSOP (QSOP)	-40	to 85 °C	CBT3245ADS	CT3245ADS	SOT724-1
20-Pin Plastic SSOP	-40	to 85 °C	CBT3245ADB	CT3245A	SOT339-1
20-Pin Plastic SO	-40	to 85 °C	CBT3245AD	CBT3245AD	SOT163-1

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

2003 Jun 27

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Philips Semiconductors	Product data
Octal bus switch	CBT3245A

LOGIC SYMBOL

2	18
A1	B1
9	11
A8	B8
19
OE

FUNCTION TABLE

		INPUT				INPUTS/OUTPUTS
						A, B
			OE
			L			A = B
			H			Z
H	=	HIGH voltage level
L	=	LOW voltage level
Z	=	HIGH impedance “off” state

SA00508

ABSOLUTE MAXIMUM RATINGS1, 2

SYMBOL	PARAMETER	CONDITIONS	RATING		UNIT
VCC	DC supply voltage		-0.5	to +7.0	V
IIK	DC input diode current	VI < 0		-50	mA
VI	DC input voltage3		-0.5	to +7.0	V
IOK	DC output diode current	VO < 0		-50	mA
VOUT	DC output voltage3	output in Off or HIGH state	-0.5 to +7		V
IOUT	DC output current	output in LOW state		128	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 “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

2.The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150 °C.

3.The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

RECOMMENDED OPERATING CONDITIONS

SYMBOL	PARAMETER		LIMITS		UNIT
		MIN		MAX
VCC	DC supply voltage	4.0		5.5	V
VIH	HIGH-level input voltage	2.0		—	V
VIL	LOW-level input voltage	—		0.8	V
Tamb	Operating free-air temperature range	-40		+85	°C

2003 Jun 27

3

Philips Semiconductors	Product data
Octal bus switch	CBT3245A

DC ELECTRICAL CHARACTERISTICS

								LIMITS
SYMBOL	PARAMETER				TEST CONDITIONS		Tamb = -40 to +85 °C			UNIT
							MIN	TYP1	MAX
VIK	Input clamp voltage		VCC = 4.5 V; II = -18 mA				—	—	-1.2	V
II	Input leakage current		VCC = 5.5 V; VI = GND or 5.5 V				—	—	±5	µA
ICC	Quiescent supply current		VCC = 5.5 V; IO = 0, VI = VCC or GND				—	1	3	µA
∆ICC	Additional supply current per		VCC = 5.5 V, one input at 3.4 V, other inputs at				—	—	3.5	mA
	input pin	2	VCC or GND
CI	Control pins		VI= 3 V or 0,			= VCC	—	3.2	—	pF
					OE
CIO(OFF)	Pin capacitance (OFF state)		VO = 3 V or 0				—	6.6	—	pF
			VCC = 4.5	V; V1 = 0 V; II = 64 mA			—	5	7
ron3	On-resistance		VCC = 4.5	V; V1 = 0 V; II = 30 mA			—	5	7	Ω
			VCC = 4.5	V; V1 = 2.4 V; II = 15 mA			—	10	15

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.

AC CHARACTERISTICS

GND = 0 V; tR; CL = 50 pF

								CBT3245A
	SYMBOL	PARAMETER	FROM			TO	Tamb = -40 to +85 °C			UNIT
			(INPUT)			(OUTPUT)	VCC = +5.0 V ±0.5 V
							MIN		MAX
	tpd	Propagation delay1	A or B			B or A	—		0.25	ns
		Output enable time
	ten			OE		A or B	1.0		5.9	ns
		to HIGH and LOW level
		Output disable time
	tdis			OE		A or B	1.0		6.0	ns
		from HIGH and LOW level

NOTES:

1.This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state resistance of the switch and a load capacitance of 50 pF, when driven by an ideal voltage source (zero output impedance).

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