LSI SYM8953U manual Electrical Characteristics, Table A.1 Maximum Power Requirements

Figure A.1 SYM8953U Mechanical Drawing

152.4 mm (6.0 inches)

CT2

LVD/SE

F1

CR3

CT3

Activity

TERM J2 SCSI LVD/SE VR1 J4

CR1	CR2	CT1
U1
	U2	SIG2_A
	5V_A
U3	GND_A	SIG1_A ICT
		6.533’’

(3.5 inches)		SCSI
88.990 mm		J3
	C 1998

U12 U7 U4

CT10

SYM8953U

U13

CT6

CT9

J1T

01

+3.3 V

L1 CT5 CT7

L2

U8

U9

CT8

					CT4
	U5
	U10			U6
				U11
			5V_B	SIG2_B
62		GND_B		SIG1_B

Note:

•J1: PCI 32-bit, universal board connector.

•J2: 68-pin HD connector.

•J3: 68-pin HD connector.

•J4: 4 pin low density connector.

A.1.2 Electrical Characteristics

The SYM8953U maximum power requirement, including SCSI TERMPWR (termination power), under normal operation is as follows:

Table A.1 Maximum Power Requirements

+ 5 V DC

±5%

1.5 A

Over the operating range 0 ° C to 55 ° C

Under abnormal conditions such as a short on SCSI TERMPWR, + 5 V current may be higher. At temperatures of at least 25 ° C a current of 4 A is sustained no longer than 30 seconds before the self-resetting TERMPWR short circuit protection device (F1) opens.

A-2 Technical Specifications