DS2107A 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS2107A Datasheet PDF : 7 Pages
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DS2107A
PIN DESCRIPTION Table 1
DS2107AE DS2107AS SYMBOL
PIN
PIN
DESCRIPTION
1
1
TERMPWR1 Termination Power 1. Should be connected to the SCSI
TERMPWR line. Must be decoupled with either a 2.2µF or 4.7µF.
See Figure 2.
3
2
R1
Signal Termination 1. 110 ohm termination.
4
3
R2
Signal Termination 2. 110 ohm termination.
5
4
R3
Signal Termination 3. 110 ohm termination.
6
5
R4
Signal Termination 4. 110 ohm termination.
7
6
R5
Signal Termination 5. 110 ohm termination.
9
7
VREF1 Reference Voltage 1. Must be externally connected directly to
the VREF2 pin. Must be decoupled with a 4.7µF and a 0.1µF as
shown in Figure 2.
10
8
GND
Ground. Signal ground; 0.0V.
11
9
TERMPWR2 Termination Power 2. Should be connected to the SCSI
TERMPWR line. Must be decoupled with either a 2.2µF or 4.7µF.
See Figure 2.
13
10
R6
Signal Termination 6. 110 ohm termination.
14
11
R7
Signal Termination 7. 110 ohm termination.
15
12
R8
Signal Termination 8. 110 ohm termination.
16
13
R9
Signal Termination 9. 110 ohm termination.
17
14
NC
No Connect. Do not connect any signal to this pin.
19
15
VREF2 Reference Voltage 2. Must be externally connected directly to
the VREF1 pin. Must be decoupled with a 4.7µF and a 0.1µF as
shown in Figure 2.
20
16
PD
Power Down. When tied low, the DS2107A enters a power-down
mode. Contains an internal 50K pull-up. Strap low to deactivate
the DS2107A, leave open circuited to activate the DS2107A.
2,8,12,18
N/A
HS–GND
Heat Sink Ground. Internally connected to the mounting pad.
Should be either grounded or electrically isolated from other cir-
cuitry.
022698 4/7
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