MAX3316EEUP-T Maxim Integrated, MAX3316EEUP-T Datasheet - Page 12

• Manufacturer Part Number: MAX3316EEUP-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3316E, MAX3317E, MAX3318E, MAX3319Er

Specifications of MAX3316EEUP-T

• Data Rate: 460 Kbps
• Operating Supply Voltage: 2.5 V
• Supply Current: 1 mA
• Operating Temperature Range: 0 C to + 70 C
• Function: Transceiver
• Number Of Drivers: 2
• Number Of I/os: 8
• Number Of Receivers: 2
• Propagation Delay Time Ns: 0.175 us
• Shutdown: No

The IEC 1000-4-2 standard covers ESD testing and
performance of finished equipment; it does not specifi-
cally refer to ICs. The MAX3316E–MAX3319E help you
design equipment that meets Level 4 (the highest level)
of IEC 1000-4-2 without the need for additional ESD-
protection components.
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 7a shows the IEC 1000-4-2 model, and
Figure 7b shows the current waveform for the 8kV, IEC
1000-4-2, Level 4, ESD Contact Discharge test.
The Air-Gap Discharge 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
contact that occurs with handling and assembly during
manufacturing. All pins require this protection during
manufacturing, not just RS-232 inputs and outputs.
Therefore, after PC board assembly, the Machine Model
is less relevant to I/O ports.
The MAX3316E–MAX3319E do not meet EIA-232
requirements for transmitter output voltage levels. EIA-232
compliance specifies transmitter output voltage swings
of ±5V when loaded with 3kΩ and 2500pF.
The receiver inputs are fully EIA-232 compliant.
The MAX3316E–MAX3319E will function properly with
most modern RS-232 interfaces. This allows RS-232
compatible communication in low-voltage systems without
the added expense of a voltage tripler or switched-
mode power supply.
±15kV ESD-Protected, 2.5V, 1µA, 460kbps,
RS-232 Compatible Transceivers
12
______________________________________________________________________________________
Applications Information
RS-232 Compatible Operation
Machine Model
IEC 1000-4-2
Figure 6b. Human Body Current Waveform
Figure 7a. IEC 1000-4-2 ESD Test Model
Figure 7b. IEC 1000-4-2 ESD Generator Current Waveform
AMPERES
VOLTAGE
SOURCE
t r = 0.7ns to 1ns
HIGH-
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT
0
100%
LIMIT RESISTOR
90%
10%
0
I
50M to 100M
t
RL
R
C
150pF
C s
30ns
STORAGE
CAPACITOR
CURRENT WAVEFORM
TIME
RESISTANCE
DISCHARGE
330Ω
R
60ns
D
t
DL
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
DEVICE
UNDER
TEST
t