- 您现在的位置：买卖IC网 > Sheet目录234 > MAX3204EETT+T (Maxim Integrated Products)IC ESD PROT ARRAY 6-TDFN
Low-Capacitance, 2/3/4/6-Channel, ±15kV ESD
Protection Arrays for High-Speed Data Interfaces
During an ESD event, the current pulse rises from zero
to peak value in nanoseconds (Figure 3). For example,
in a 15kV IEC-61000 Air-Gap Discharge ESD event,
the pulse current rises to approximately 45A in 1ns
(di/dt = 45 x 10 9 ). An inductance of only 10nH adds an
additional 450V to the clamp voltage. An inductance of
10nH represents approximately 0.5in of board trace.
Regardless of the device’s specified diode clamp volt-
age, a poor layout with parasitic inductance significantly
increases the effective clamp voltage at the protected
signal line.
A low-ESR 0.1μF capacitor must be used between V CC
and GND. This bypass capacitor absorbs the charge
transferred by an +8kV IEC-61000 Contact Discharge
ESD event.
Ideally, the supply rail (V CC ) would absorb the charge
caused by a positive ESD strike without changing its
regulated value. In reality, all power supplies have an
? ±15kV using the Human Body Model
? ±8kV using the Contact Discharge method speci-
fied in IEC 61000-4-2
? ±15kV using the IEC 61000-4-2 Air-Gap Discharge
method
ESD Test Conditions
ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
Human Body Model
Figure 4 shows the Human Body Model, and Figure 5
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the device through a
1.5k ? resistor.
effective output impedance on their positive rails. If a
power supply’s effective output impedance is 1 ? , then
by using V = I × R, the clamping voltage of V C increas-
es by the equation V C = I ESD x R OUT . An +8kV IEC
61000-4-2 ESD event generates a current spike of 24A,
so the clamping voltage increases by V C = 24A × 1 ? ,
R C
1M ?
CHARGE-CURRENT-
LIMIT RESISTOR
R D
1.5k ?
DISCHARGE
RESISTANCE
or V C = 24V. Again, a poor layout without proper
bypassing increases the clamping voltage. A ceramic
chip capacitor mounted as close to the MAX3202E/
HIGH-
VOLTAGE
DC
Cs
100pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
MAX3203E/MAX3204E/MAX3206E V CC pin is the best
choice for this application. A bypass capacitor should
also be placed as close to the protected device as
possible.
±15kV ESD Protection
ESD protection can be tested in various ways; the
MAX3202E/MAX3203E/MAX3204E/MAX3206E are
characterized for protection to the following limits:
I
SOURCE
Figure 4. Human Body ESD Test Model
100%
90%
I P 100%
90%
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPERES
36.8%
10%
10%
0
t R = 0.7ns to 1ns
30ns
t
0
t RL
TIME
t DL
60ns
Figure 3. IEC 61000-4-2 ESD Generator Current Waveform
CURRENT WAVEFORM
Figure 5. Human Body Model Current Waveform
_______________________________________________________________________________________
5
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
MAX3205EATE+
IC ESD PROT DIFF 16-TQFN
MAX5490GA01000+T
RES NET 50K OHM 2 RES SOT23-8
MAX5491NA01500+T
RES NET MULT OHM 2 RES SOT-23
MAX5492LB10000+T
RES NET MULT OHM 2 RES SOT-23
MB2181SS2G13-CC
SWITCH PUSH 4PDT 0.4VA 28V
MB2185SB1W01-6C-A
SWITCH PUSHBUTTON 4PDT 6A 125V
MB2411JA01-G-1A
SWITCH PUSHBUTTON SPDT 3A 125V
MB2461A2W30-FA
SWITCH PUSHBUTTON DPDT 3A 125V
相关代理商/技术参数
MAX3204EETT-T
功能描述:TVS二极管阵列 RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C
MAX3204EEWT+T
功能描述:TVS二极管阵列 4Ch ESD Protection Array RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C
MAX3205EABL
制造商:Maxim Integrated Products 功能描述:QUAD AND HEX HIGH-SPEED DIFFERENTIA - Rail/Tube
MAX3205EABL/GG8
制造商:Maxim Integrated Products 功能描述:
MAX3205EABL+
制造商:Maxim Integrated Products 功能描述:HS DIFFERENTIAL ESD PROT ICS - Rail/Tube
MAX3205EABL+T
功能描述:TVS二极管阵列 6Ch Differential ESD Protection IC RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C
MAX3205EABL-T
功能描述:TVS二极管阵列 RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C
MAX3205EATE
功能描述:TVS二极管阵列 RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C