Maxim /MAX4889A, Instructions Manual, Page: 6 / 14

MAX4888A/MAX4889A
5.0Gbps PCI Express Passive Switches
6 _______________________________________________________________________________________
Pin Description
PIN
MAX4888A MAX4889A
NAME FUNCTION
1, 10, 12, 14,
20, 25, 27
1, 4, 10, 14, 17,
19, 21, 39, 41
GND Ground
2 9 SEL Digital Control Input
3, 9 — N.C. No Connection. Not internally connected.
4 2 COM1+ Analog Switch 1. Common Positive Terminal.
5 3 COM1- Analog Switch 1. Common Negative Terminal.
6 6 COM2+ Analog Switch 2. Common Positive Terminal.
7 7 COM2- Analog Switch 2. Common Negative Terminal.
8, 11, 13, 19,
26, 28
5, 8, 13, 18,
20, 30,
40, 42
V+
Positive-Supply Voltage Input. Connect V+ to a 1.65V to 3.6V supply voltage.
Bypass V+ to GND with a 0.1µF capacitor placed as close to the device as possible
(See the
Board Layout section).
15 31 NO2- Analog Switch 2. Normally Open Negative Terminal.
16 32 NO2+ Analog Switch 2. Normally Open Positive Terminal.
17 33 NO1- Analog Switch 1. Normally Open Negative Terminal.
18 34 NO1+ Analog Switch 1. Normally Open Positive Terminal.
21 35 NC2- Analog Switch 2. Normally Closed Negative Terminal.
22 36 NC2+ Analog Switch 2. Normally Closed Positive Terminal.
23 37 NC1- Analog Switch 1. Normally Closed Negative Terminal.
24 38 NC1+ Analog Switch 1. Normally Closed Positive Terminal.
— 11 COM3+ Analog Switch 3. Common Positive Terminal.
— 12 COM3- Analog Switch 3. Common Negative Terminal.
— 15 COM4+ Analog Switch 4. Common Positive Terminal.
— 16 COM4- Analog Switch 4. Common Negative Terminal.
— 22 NO4- Analog Switch 4. Normally Open Negative Terminal.
— 23 NO4+ Analog Switch 4. Normally Open Positive Terminal.
— 24 NO3- Analog Switch 3. Normally Open Negative Terminal.
— 25 NO3+ Analog Switch 3. Normally Open Positive Terminal.
— 26 NC4- Analog Switch 4. Normally Closed Negative Terminal.
— 27 NC4+ Analog Switch 4. Normally Closed Positive Terminal.
— 28 NC3- Analog Switch 3. Normally Closed Negative Terminal.
— 29 NC3+ Analog Switch 3. Normally Closed Positive Terminal.
EP EP EP Exposed Paddle. Connect EP to GND.