MAX6817 MAXIM [Maxim Integrated Products], MAX6817 Datasheet - Page 7

• Manufacturer Part Number: MAX6817
• Manufacturer: MAXIM [Maxim Integrated Products]

meets Level 4 (the highest level) of IEC1000-4-2, with-
out the need for additional ESD-protection compo-
nents.
The major difference between tests done using the
Human Body Model and IEC1000-4-2 is higher peak
current in IEC1000-4-2, because series resistance is
lower in the IEC1000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC1000-4-2 is generally
lower than that measured using the Human Body
Model. Figure 7a shows the IEC1000-4-2 model and
Figure 7b shows the current waveform for the 8kV,
IEC1000-4-2, Level 4, ESD Contact-Discharge test.
The Air-Gap test involves approaching the device with
a charged probe. The Contact-Discharge method
connects the probe to the device before the probe is
energized.
TOP VIEW
±15kV ESD-Protected, Single/Dual/Octal,
_______________________________________________________________________________________
GND
IN1
IN2
1
2
3
SOT23-6
MAX6817
6
5
4
OUT1
V
OUT2
CC
CMOS Switch Debouncers
The Machine Model for ESD tests all pins using a
200pF storage capacitor and zero discharge resis-
tance. Its objective is to emulate the stress caused by
contact that occurs with handling and assembly during
manufacturing.
The MAX6818 has an output enable (EN) input that
allows switch outputs to be three-stated on the µP data
bus until polled by the µP. Also, state changes at the
switch inputs are detected, and an output (CH) goes low
after the debounce period to signal the µP. Figure 4
shows the timing diagram for enabling outputs and read-
ing data. If the output enable is not used, tie EN to GND
to “always enable’’ the switch outputs. If EN is low, CH is
always high. If a change of state is not required, leave
CH unconnected.
MAX6816 TRANSISTOR COUNT: 284
MAX6817 TRANSISTOR COUNT: 497
MAX6818 TRANSISTOR COUNT: 2130
SUBSTRATE CONNECTED TO GND
___________________Chip Information
Pin Configurations (continued)
GND
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
EN
10
1
2
3
4
5
6
7
8
9
MAX6818
SSOP
MAX6818 µP Interfacing
20
19
18
17
16
15
14
13
12
11
V
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
CH
CC
Machine Model
7