MAX3314ESA+ Maxim Integrated Products, MAX3314ESA+ Datasheet - Page 6

• Manufacturer Part Number: MAX3314ESA+
• Description: IC TXRX RS232 460KBPS 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX3314ESA+

• Number Of Drivers/receivers: 1/1
• Protocol: RS232
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The IEC 1000-4-2 standard covers ESD testing and per-
formance of finished equipment; it does not specifically
refer to ICs. The MAX3314E helps design equipment
that meets Level 4 (the highest level) of IEC 1000-4-2
without the need for additional ESD-protection compo-
nents.
The major difference between tests done using the
Human Body Model and IEC 1000-4-2 is higher peak
current in IEC 1000-4-2 because series resistance is
lower in the IEC 1000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC 1000-4-2 is generally
lower than that measured using the Human Body Model.
Figure 7 shows the IEC 1000-4-2 model, and Figure 8
shows the current waveform for the 8kV, IEC 1000-4-2,
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.
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
±15kV ESD-Protected, 460kbps, 1µA,
RS-232-Compatible Transceiver
Figure 5. Human Body ESD Test Model
Figure 6. Human Body Current Waveform
6
AMPERES
VOLTAGE
SOURCE
_______________________________________________________________________________________
HIGH-
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT
0
LIMIT RESISTOR
0
t
1MΩ
RL
R
100pF
C
C s
CURRENT WAVEFORM
STORAGE
CAPACITOR
TIME
RESISTANCE
1500Ω
DISCHARGE
R
t
D
DL
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Machine Model
IEC 1000-4-2
DEVICE
UNDER
TEST
contact that occurs with handling and assembly during
manufacturing. Of course, all pins require this protec-
tion during manufacturing, not just RS-232 inputs and
outputs. Therefore, after PC board assembly, the
Machine Model is less relevant to I/O ports.
TRANSISTOR COUNT: 128
Figure 7. IEC 1000-4-2 ESD Test Model
Figure 8. IEC 1000-4-2 ESD Generator Current Waveform
t r = 0.7ns to 1ns
VOLTAGE
SOURCE
HIGH-
DC
100%
90%
10%
CHARGE-CURRENT
LIMIT RESISTOR
I
50MΩ to 100MΩ
R
C
150pF
C s
30ns
STORAGE
CAPACITOR
RESISTANCE
DISCHARGE
330Ω
R
60ns
D
Chip Information
DEVICE
UNDER
TEST
t