DS21S07AE Maxim Integrated Products, DS21S07AE Datasheet

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DS21S07AE

Manufacturer Part Number
DS21S07AE
Description
IC TERMINATOR SCSI 20-TSSOP
Manufacturer
Maxim Integrated Products
Type
SCSI, LVD, SEr
Datasheet

Specifications of DS21S07AE

Number Of Terminations
9
Voltage - Supply
4 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Operating Supply Voltage
4 V to 5.5 V
Supply Current
250 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Number Of Bits
9
Resistance
110 Ohms
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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Manufacturer
Quantity
Price
Part Number:
DS21S07AE
Manufacturer:
DALLAS
Quantity:
5
Part Number:
DS21S07AE
Manufacturer:
DALLAS
Quantity:
5 510
Part Number:
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Quantity:
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Part Number:
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Quantity:
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www.maxim-ic.com
GENERAL DESCRIPTION
Fast SCSI and Ultra SCSI require the use of active
terminations at both ends of every cable segment in a
SCSI system with single-ended drivers and receivers.
The DS21S07A SCSI terminator, which is fully
compliant with these standards, enables the designer
to gain the benefits of active termination: greater
immunity to voltage drops on the TERMPWR
(TERMination PoWeR) line, enhanced high-level
noise immunity, intrinsic TERMPWR decoupling,
and very low quiescent current consumption. The
DS21S07A integrates a regulator and nine precise
switched
monolithic IC. The DS21S07A can be electrically
isolated from the SCSI bus without physical removal
from the SCSI device.
FEATURES
Fully Compliant with SCSI-1, Fast SCSI, and
Ultra SCSI
Backward Compatible to the DS2107 and
DS2107A
Provides Active Termination for Nine Signal
Lines
Laser-Trimmed 110Ω Termination Resistors
Have 2% Tolerance
Low Drop-Out Voltage Regulator
Power-Down Mode Isolates Termination
Resistors from the Bus
SCSI Bus Hot Plug Compatible
Fully Supports Actively Negated SCSI Signals
On-Board Thermal Shutdown Circuitry
16-Pin Plastic SO (DS21S07AS) and 20-Pin
Plastic TSSOP (Thin Shrink Small Outline
Package) (DS21S07AE)
110Ω
termination
resistors
into
a
1 of 5
PIN CONFIGURATIONS
ACTUAL FOOTPRINT SIZE
ORDERING INFORMATION
+
lead-free packages.
Note: All devices are specified over the 0°C to +70°C operating
temperature range.
DS21S07AS
DS21S07AS+
DS21S07AS/T&R
DS21S07AS+T&R
DS21S07AE
DS21S07AE/T&R
Denotes lead-free package. The top mark includes a “+" on
PART
0.41"
DS21S07AS
0.41"
VOLTAGE
SCSI Terminator
(V)
5
5
5
5
5
5
PIN-
PACKAGE
16 SO
16 SO
16 SO
16 SO
20 TSSOP
20 TSSOP
0.27"
DS21S07A
DS21S07AE
0.26"
REV: 022106
TOP
MARK
DS21T07S
DS21T07S
DS21T07S
DS21T07S
DS21T07E
DS21T07E

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DS21S07AE Summary of contents

Page 1

... Resistors from the Bus SCSI Bus Hot Plug Compatible Fully Supports Actively Negated SCSI Signals On-Board Thermal Shutdown Circuitry 16-Pin Plastic SO (DS21S07AS) and 20-Pin Plastic TSSOP (Thin Shrink Small Outline Package) (DS21S07AE) PIN CONFIGURATIONS resistors into a ACTUAL FOOTPRINT SIZE ORDERING INFORMATION ...

Page 2

FUNCTIONAL DESCRIPTION The DS21S07A consists of a bandgap reference, buffer amplifier, and nine termination resistors (Figure 1). The bandgap reference circuit produces a precise 2.55V level that is fed to a buffer amplifier. The buffer produces a 2.85V level and ...

Page 3

Figure 2. Typical Differential SCSI Bus Configuration NOTE 4.7µF TANTALUM CAPACITOR 2.2µF TANTALUM OR 4.7µF ALUMINUM CAPACITOR. NOTE 2: IF THE DS21S07A EMBEDDED INTO A PERIPHERAL THAT WILL ACT AS A TARGET ...

Page 4

Table 1. Pin Description PIN NAME TSSOP TERMPWR1 2, 8, 12, — HS-GND 18 3–7, 2–6, R1–R9 13–16 10– VREF1 10 8 GND 11 9 TERMPWR2 VREF2 ...

Page 5

ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………………………………………..-1.0V to +7.0V Operating Temperature Range………………………………………………………………..0°C to +70°C Storage Temperature Range………………………………………………………………-55°C to +125°C Soldering Temperature………………………………………….See IPC/JEDEC J-STD-020 Specification This is a stress rating only and functional operation of the device ...

Page 6

NOTES: 1) 4.00V < TERMPWR < 5.50V. 2) 0.0V < signal lines < TERMPWR. 3) All signal lines = 0V. 4) All signal lines open 0V. 6) Guaranteed by design; not production tested ...

Page 7

PACKAGE INFORMATION (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/DallasPackInfo ...

Page 8

... No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation © 2006 Maxim Integrated Products • Printed USA ...

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