MCCS142237DTR2 ON Semiconductor, MCCS142237DTR2 Datasheet - Page 2

• Manufacturer Part Number: MCCS142237DTR2
• Manufacturer: ON Semiconductor
• Type: SCSI Terminationr

Specifications of MCCS142237DTR2

• Termination Resistance (rt Or Rterm) (typ): 110Ohm
• Number Of Bits: 9
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Package Type: TSSOP
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Not Compliant

PIN DESCRIPTIONS
MCCS142237
MOTOROLA
PD Input Application
A. No Connection to PD
B. Single Pole Switch to GND
C. Hardwired “High”
D. Hardwired “Low”
TERMPWR1
R1
R2
R3
R4
R5
VREF1
GND
TERMPWR2
R6
R7
R8
R9
NC
VREF2
PD
HS–GND
Symbol
TERMPWR1
HS–GND
HS–GND
Figure 1. 20–Lead Pinout (Top View)
VREF1
GND
2,8,12,18
20–Lead
R1
R2
R3
R4
R5
TSSOP
10
11
13
14
15
16
17
19
20
1
3
4
5
6
7
9
10
1
2
3
4
5
6
7
8
9
16–Lead
SOIC
N/A
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
Result
PD input will be pulled “HIGH” internally. This connects the termination resistors.
PD input will be pulled “HIGH” internally when the switch is open, which connects the
termination resistors. PD input will be held “LOW” when the switch is closed,
disconnecting the termination resistors and turning off the voltage regulator.
The MCCS142237 will be permanently connected and provide termination on all outputs.
The MCCS142237 will be permanently disconnected.
20
19
18
17
16
15
14
13
12
11
Termination Power 1. Connect to the SCSI TERMPWR line. See Figure 4.
Signal Termination 1. 110 ohm termination.
Signal Termination 2. 110 ohm termination.
Signal Termination 3. 110 ohm termination.
Signal Termination 4. 110 ohm termination.
Signal Termination 5. 110 ohm termination.
Reference Voltage 1. Must be externally connected directly to the VREF2 pin. See Figure 4.
Ground. Signal ground; 0.0V.
Termination Power 2. Should be connected to the SCSI TERMPWR line. See Figure 4.
Signal Termination 6. 110 ohm termination.
Signal Termination 7. 110 ohm termination.
Signal Termination 8. 110 ohm termination.
Signal Termination 9. 110 ohm termination.
No Connect. Do not connect any signal to this pin.
Reference Voltage 2. Must be externally connected directly to the VREF1 pin. See Figure 4.
Power Down. When tied low, the MCCS142237 enters power– down mode. Contains an inter-
nal 50k pull–up. Tie low to de–activate the MCCS142237, leave open circuited or tie high to
activate the MCCS142237.
Heat Sink Ground.
PD
VREF2
HS–GND
NC
R9
R8
R7
R6
HS–GND
TERMPWR2
2
TERMPWR1
Description
Figure 2. 16–Lead Pinout (Top View)
VREF1
GND
R1
R2
R3
R4
R5
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SCSI TERMINATORS
PD
VREF2
NC
R9
R8
R7
R6
TERMPWR2
BR1486