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ST21S07ACW Scheda tecnica(PDF) 2 Page - STMicroelectronics

Il numero della parte ST21S07ACW
Spiegazioni elettronici  SCSI TERMINATOR
Download  10 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST21S07ACW Scheda tecnica(HTML) 2 Page - STMicroelectronics

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ST21S07A
2/10
PIN CONFIGURATION
PIN DESCRIPTION
PlN N°
(TSSP20)
PlN N°
(SO-16L)
SYMBOL
NAME AND FUNCTION
1
1
TERMPWR1 Termination Power 1: Should be connected to the SCSI TERMPWR line.
Must be decoupled with either a 2.2
µF or 4.7µF. See Fig. 2.
2
HS-GND
Heat Sink Ground: Internally connected to the mounting pad. Should be
either grounded or electrically isolated from the other circuitry.
32
R1
Signal Termination 1: 110
Ω Termination
43
R2
Signal Termination 2: 110
Ω Termination
54
R3
Signal Termination 3: 110
Ω Termination
65
R4
Signal Termination 4: 110
Ω Termination
76
R5
Signal Termination 5: 110
Ω Termination
8
HS-GND
Heat Sink Ground: Internally connected to the mounting pad. Should be
either grounded or electrically isolated from the other circuitry.
97
VREF1
Reference Voltage 1: Must be external connected directly to the VREF2
pin. Must be decoupoled with 4.7
µF capacitor as shown in Figure 2
10
8
GND
Ground: Signal groud: 0V
11
9
TERMPWR
Termination Power21: Should be connected to the SCSI TERMPWR line.
Must be decoupled with either a 2.2
µF or 4.7µF. See Fig. 2.
12
HS-GND
Heat Sink Ground: Internally connected to the mounting pad. Should be
either grounded or electrically isolated from the other circuitry.
13
10
R6
Signal Termination 6: 110
Ω Termination
14
11
R7
Signal Termination 7: 110
Ω Termination
15
12
R8
Signal Termination 8: 110
Ω Termination
16
13
R9
Signal Termination 9: 110
Ω Termination
17
14
NC
Not connected: Do not connect any signal to this pin
18
HS-GND
Heat Sink Ground: Internally connected to the mounting pad. Should be
either grounded or electrically isolated from the other circuitry.
19
15
VREF2
Reference Voltage 2: Must be external connected directly to the VREF1
pin. Must be decoupoled with 4.7
µF capacitor
20
16
PD
Power Down: When tied low, the ST21S07A enters a power down mode.
Contains an internal 60K pull-up. Strap low to deactivate the ST21S07A,
leave open circuited to activate the ST21S07A
SO-16L
TSSOP20


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