OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

DS21T05Z+

P1-P3P4-P6P7-P7
DS21T05
4 of 7
PIN DESCRIPTION Table 1
DS21T05Z
PIN
SYMBOL DESCRIPTION
1 TERMPWR1 Termination Power 1. Should be connected to the SCSI TERMPWR
line. Must be decoupled with either a 2.2 µF or 4.7 µF. See Figure 2.
2R1Signal Termination 1. 110-ohm termination.
3R2Signal Termination 2. 110-ohm termination.
4R3Signal Termination 3. 110-ohm termination.
5R4Signal Termination 4. 110-ohm termination.
6R5Signal Termination 5. 110-ohm termination.
7VREF1Reference 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.
8 GND Ground. Signal ground; 0.0V.
9 TERMPWR2 Termination Power 2. Should be connected to the SCSI TERMPWR
line. Must be decoupled with either a 2.2 µF or 4.7 µF. See Figure 2.
10 NC No Connect. Do not connect any signal to this pin.
11 R6 Signal Termination 6. 110-ohm termination.
12 R7 Signal Termination 7. 110-ohm termination.
13 R8 Signal Termination 8. 110-ohm termination.
14 R9 Signal Termination 9. 110-ohm termination.
15 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.
16
PD
Power Down. When tied low, the DS21T05 enters a power-down
mode. Contains an internal 50K pull-up. Strap low to deactivate the
DS21T05, leave open circuited to activate the DS21T05.
DS21T05
5 of 7
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground -1.0V to +7.0V
Operating Temperature 0°C to 70°C
Storage Temperature -55°C to +125°C
Soldering Temperature 260°C for 10 seconds
* This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
The Dallas Semiconductor DS21T05 is built to the highest quality standards and manufactured for long
term reliability. All Dallas Semiconductor devices are made using the same quality materials and
manufacturing methods. However, the DS21T05 is not exposed to environmental stresses, such as burn-
in, that some industrial applications require. For specific reliability information on this product, please
contact the factory in Dallas at (972) 371-4448.
RECOMMENDED OPERATING CONDITIONS (0°C to 70°C)
PARAMETER SYM MIN TYP MAX UNITS NOTES
TERMPWR Voltage V
TP
4.00 5.50 V
PD Active
V
PDA
-0.3 +0.8 V
PD Inactive
V
PDI
2.0 V
TP
+ 0.3 V
DC CHARACTERISTICS (0°C to 70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
TERMPWR Current I
TP
I
TP
5
250
8
mA
mA
1, 3
1, 4
Power-Down Current I
PD
500 µA 1, 2, 5
Termination Resistance R
TERM
107.5 110 119.5 ohm 1, 2
Die Thermal Shutdown T
SD
150 °C 1, 6
Power Down
Termination Capacitance
C
PD
3.0 pF 1, 2, 5, 6
Input Leakage High I
IH
-1.0 µA 1, 8
Input Leakage Low I
IL
1.0 µA 1, 7
REGULATOR CHARACTERISTICS (0°C to 70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Output Voltage V
REF
2.7 2.85 3.1 V 1, 2
Drop Out Voltage V
DROP
0.75 1.0 V 3, 6
Output Current I
OUT
25.2 mA 9
Line Regulation LI
REG
1.0 2.0 % 1, 4
Load Regulation LO
REG
1.3 3.0 % 1, 2
Current Limit I
LIM
350 mA 1
Sink Current I
SINK
200 mA 1
DS21T05
6 of 7
NOTES:
1. 4.00V < TERMPWR < 5.50V.
2. 0.0V < signal lines < 3.0V.
3. All signal lines = 0.0V.
4. All signal lines open.
5. PD = 0.0V.
6. Guaranteed by design; not production tested.
7. R
1
through R
9
only.
8. R
1
through R
9
and PD .
9. V
SIGNAL
= 0.2V.
DS21T05Z SCSI TERMINATOR 16-PIN SOIC (150-MIL)
PKG 16-PIN
DIM MIN MAX
A IN.
MM
0.053
1.35
0.069
1.75
A1 IN.
MM
0.004
0.10
0.010
0.25
A2 IN.
MM
0.048
1.24
0.062
1.57
b IN.
MM
0.012
0.30
0.020
0.50
C IN.
MM
0.007
0.17
0.011
0.28
D IN.
MM
0.386
9.80
0.393
9.98
e IN.
MM
0.050 BSC
1.27 BSC
E1 IN.
MM
0.150
3.81
0.158
4.01
H IN.
MM
0.230
5.84
0.244
6.20
L IN.
MM
0.016
0.40
0.050
0.89
Θ
ΘΘ
Θ
0° 8°
P1-P3P4-P6P7-P7

DS21T05Z+

Mfr. #:
Buy DS21T05Z+
Manufacturer:
Maxim Integrated
Description:
SCSI Interface IC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet