ST1284-03A8RL STMicroelectronics, ST1284-03A8RL Datasheet - Page 4

• Manufacturer Part Number: ST1284-03A8RL
• Description: Switching Converters, Regulators & Controllers Parallel Port Term
• Manufacturer: STMicroelectronics

Specifications of ST1284-03A8RL

• Mounting: Surface Mount
• Pin Count: 28
• Operating Temperature Classification: Commercial
• Mounting Style: SMD/SMT
• Package / Case: QSOP-28
• Lead Free Status / RoHS Status: Compliant

ST1284-xxA8
TECHNICAL INFORMATION
FREQUENCY BEHAVIOR OF DATA AND STROBE SIGNALS
ESD PROTECTION
In addition to the requirements of termination and EMC compatibility, computing devices are required to be
tested for ESD susceptibility. This test is described in the IEC61000-4-2 and is already in place in Europe.
This test requires that a device tolerates ESD events and remain operational without user intervention.
The ST1284-xxA8 is particularly optimized to perform ESD protection. ESD protection is based on the use
of device which clamps at :
This protection function is splitted in 2 stages. As shown in figure A3, the ESD strikes are clamped by the
first stage S1 and then its remaining overvoltage is applied to the second stage through the resistor R.
Such a configuration makes the voltage very low at the output.
Fig. A3: ST1284 ESD clamping behavior.
4/6
Fig. A1: Measurement conditions.
ESD Surge
Vg
TRACKING
GENERATOR
50
Vin
Rg
ST1284
+5V
Vout
V
Rd
BR
S1
SPECTRUM
ANALYSER
50
Vouput
Vinput
ST1284-xxA8
R
Voutput
V
Fig. A2: Typical frequency response curve for data
and strobe signals.
BR
- 10.00
- 15.00
- 20.00
- 25.00
- 30.00
- 5.00
0.00
dB
R I
1
d PP
.
1284 - 01
1284 - 03
3
S2
Rd
V
BR
10
F (MHz)
30
1284 - 02
100
protected
Device
to be
Rload
300
1,000