DS21S07ASSLASHT datasheet(4/8 Pages) MAXIM

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DS21S087A

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Table 1. Pin Description

TSSOP

NAME

FUNCTION

TERMPWR1

Termination Power 1. Should be connected to the SCSI

TERMPWR line. Must be decoupled with either a 2.2

µF

capacitor or 4.7

µF capacitor. See Figure 2.

2, 8, 12,

—

HS-GND

Heat Sink Ground. Internally connected to the mounting pad.

Should be either grounded or electrically isolated from other

circuitry.

3–7,

13–16

2–6,

10–13

R1–R9

Signal Termination 1–9. 110

Ω termination.

VREF1

Reference Voltage 1. Must be externally connected directly to

the VREF2 pin. Must be decoupled with a 4.7

µF capacitor as

shown in Figure 2.

GND

Ground. 0V, signal ground.

TERMPWR2

Termination Power 2. Should be connected to the SCSI

TERMPWR line. Must be decoupled with either a 2.2

µF

capacitor or 4.7

µF capacitor. See Figure 2.

No Connection. Do not connect any signal to this pin.

VREF2

Reference Voltage 2. Must be externally connected directly to

the VREF1 pin. Must be decoupled with a 4.7

µF capacitor as

shown in Figure 2.

Active-Low Power-Down. When tied low, the DS21S07A

enters a power-down mode. Contains an internal 50k

Ω pullup

resistor. Strap low to deactivate the DS21S07A; leave open

circuited to activate the DS21S07A

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