Texas Instruments UCC5630AMWP, UCC5630AFQPTR, UCC5630AFQP, UCC5630AMWPTR Datasheet

UCC5630A

Multimode SCSI 9 Line Terminator

FEATURES

•Auto Selection Single Ended (SE) or Low Voltage Differential (LVD) Termination

•Meets SCSI-1, SCSI-2, SCSI-3, SPI, Ultra (Fast-20), Ultra2 (SPI-2 LVD) and Ultra3 Standards

•2.7V to 5.25V Operation

•Differential Failsafe Bias

•Thermal packaging for low junction temperature and better MTBF

•Master/Slave Input

•Supports Active Negation

•3pF Channel Capacitance

DESCRIPTION

The UCC5630A Multimode SCSI Terminator provides a smooth transition into the next generation of the SCSI Parallel Interface (SPI-2). It automatically senses the bus, via DIFFB, and switches the termination to either single ended (SE) or low voltage differential (LVD) SCSI, dependent on which type of devices are connected to the bus. The UCC5630A can not be used on a HVD, EIA485, differential SCSI bus. If the UCC5630A detects a HVD SCSI device, it switches to a high impedance state.

The Multimode terminator contains all functions required to terminate and auto detect and switch modes for SPI-2 bus architectures. Single Ended and Differential impedances and currents are trimmed for maximum effectiveness. Fail Safe biasing is provided to insure signal integrity. Device/Bus type detection circuitry is integrated into the terminator to provide automatic switching of termination between single ended and LVD SCSI and a high impedance for HVD SCSI. The multimode function provides all the performance analog functions necessary to implement SPI-2 termination in a single monolithic device.

The UCC5630A is offered in a 36 pin SSOP package, as well as a 48 pin LQFP package for a temperature range of 0°C to 70°C.

BLOCK DIAGRAM

		HIPD	LVD	SE
		35	34	33
				(NOISE LOAD)
	2.15V			HIPD
				REF 1.3V	1.3V
					20 DIFSENS
DIFFB 21				LVD
	0.6V				–15mA ≤ ISOURCE ≤ –5mA
				SE	50 A ≤ ISINK ≤ 200 A
MSTR/SLV	19
				110
	SE REF 2.7V	SOURCE/SINK REGULATOR

					124	56mV	52.5
		LVD REF 1.25V				– +	5	L1–
						56mV	52.5
						+ –	4	L1+
			MODE	ALL		SE GND SWITCH
				SWITCHES
		10 A	SE	UP	110
			LVD	DOWN
			HIPD	OPEN	124	56mV	52.5
		ENABLE
DISCNCT	17		DISCNCT	OPEN		– +	32	L9–
		SWITCHES
						56mV	52.5
						+ –	31	L9+
TRMPWR	36					SE GND SWITCH

	18									8			9		10					26		27		28																				1
																																																																																							PATENTED CIRCUIT DESIGN
GND															HS/GND																												REG

UDG-98192

Note: Indicated pinout is for 36 pin SSOP package.

SLUS322A - SEPTEMBER 1999

ABSOLUTE MAXIMUM RATINGS

TRMPWR Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Signal Line Voltage . . . . . . . . . . . . . . . . . . . . . 0V to TRMPWR Package Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 2W Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C Junction Temperature. . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10sec.) . . . . . . . . . . . . . +300°C

All voltages are with respect to pin 18. Currents are positive into, negative out of the specified terminal. Consult Packaging Section of the Databook for thermal limitations and considerations of packages.

RECOMMENDED OPERATING CONDITIONS

TRMPWR Voltage . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.25V

LQFP-48 (Top View)

FQP Package

HS/GND																																																																				HS/GND
HS/GND																																																																				L4–
L5+																																																																				L4+
L5–																																																																				L3–
DISCNCT																																																																				L3+
GND																																																																				NC
MSTR/SLV				48					47					46					45					44					43					42					41					40					39						38					37							L2–
				1																																																								36
DIFSENS				2																																																								35							L2+
DIFFB				3																																																								34							L1–
N/C				4																																																								33							L1+
HS/GND				5																																																								32							HS/GND
HS/GND				6																																																								31							HS/GND
HS/GND				7																																																								30							HS/GND
HS/GND				8																																																								29							HS/GND
L6+				9																																																								28							NC
L6–				10																																																								27							NC
L7+				11																																																								26							REG
L7–				12																																																								25							NC
				13					14					15					16					17					18					19					20					21					22						23					24
L8+																																																																				NC
L8–																																																																				TERMPWR
L9+																																																																				HIPD
L9–																																																																				LVD
HS/GND																																																																				SE
HS/GND																																																																				HS/GND

UCC5630A

CONNECTION DIAGRAM

QSOP-36 (Top View)

MWP Package

REG	1	36	TRMPWR
N/C	2	35	HIPD
N/C	3	34	LVD
L1+	4	33	SE
L1–	5	32	L9–
L2+	6	31	L9+
L2–	7	30	L8–
HS/GND	8	29	L8+
HS/GND	9	28	HS/GND
HS/GND	10	27	HS/GND
L3+	11	26	HS/GND
L3–	12	25	L7–
L4+	13	24	L7+
L4–	14	23	L6–
L5+	15	22	L6+
L5–	16	21	DIFF B
DISCNCT	17	20	DIFSENS
GND	18	19	MSTR/SLV

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