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参数资料
| 型号： | MAX6921AQI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC DRVR VFD TUBE SRL 28-PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 500 |
| 显示器类型： | 真空荧光 (VF) |
| 接口： | 4 线串行 |
| 电流 - 电源： | 1.65mA |
| 电源电压： | 8 V ~ 76 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 带卷 (TR) |
20-Output, 76V, Serial-Interfaced
VFD Tube Drivers
A multiplexed tube dissipation example follows:
V CC = 5V ±5%, V BB = 36V to 42V, A = 12, G = 8,
I ANODE = 0.4mA, I GRID = 24mA
P D = (5.25V x 1mA)+ (42V x 1.4mA)
Typical Application Circuit
+ ((2.5V x 0.4mA/25mA) x 0.4mA x 12)
+ ((2.5V x 24mA/25mA) x 24mA) = 122mW
Thus, for a 28-pin wide TSSOP package (T JA = 1 / 0.0128
= 78.125°C/W from Absolute Maximum Ratings), the
maximum allowed ambient temperature T A is given by:
MAX685x
VFDOUT
VFCLK
VFLOAD
MAX6921
DIN
CLK
LOAD
T J(MAX) = T A + (P D x T JA ) = 150°C = T A + (0.122
x 78.125°C/W)
VFBLANK
BLANK
DOUT
So T A = +140.5°C.
This means that the driver can be operated in this
application up to the MAX6921/MAX6931s ’ +125°C
maximum operating temperature.
Power-Supply Considerations
The MAX6921/MAX6931 operate with multiple power-
supply voltages. Bypass the V CC , V BB , and V SS
MAX6921
DIN
CLK
LOAD
(MAX6931 only) power-supply pins to GND with 0.1μF
capacitors close to the device. The MAX6931 can be
operated with V SS connected to GND if a negative bias
supply is not required. For multiplex applications, it
may be necessary to add an additional bulk electrolytic
BLANK
DOUT
capacitor of 1μF or greater to the V BB supply.
Power-Supply Sequencing
The order of the power-supply sequencing is not impor-
DIN
CLK
MAX6921
tant. The MAX6921/MAX6931 will not be damaged if
any combination of V CC , V BB , and V SS (MAX6931 only)
is grounded while the other supply or supplies are
maintained up to their maximum ratings. However, as
with any CMOS device, do not drive the MAX6921/
MAX6931s’ logic inputs if the logic supply V CC is not
operational because the input protection diodes clamp
the signals.
Cascading Drivers (MAX6921 Only)
Multiple MAX6921s can be cascaded, as shown in the
Typical Application Circuit, by connecting each driver’s
DOUT to DIN of the next drivers. Devices can be cas-
caded at the full 5MHz CLK speed when V CC ≥ 4.5V.
When V CC <4.5V, the longer propagation delay (t DO )
limits the maximum cascaded CLK to 4MHz.
LOAD
BLANK
DOUT
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6921AUI | 功能描述:VFD驱动器 12-Output 76V Serial VFD Tube Driver RoHS:否 制造商:Maxim Integrated 工作电源电压:8 V to 76 V, 3 V to 5.5 V 电源电流:0.9 mA, 700 uA 最大工作温度:+ 125 C 封装 / 箱体:SOIC-20 封装:Tube |
| MAX6921AUI+ | 功能描述:VFD驱动器 12-Output 76V Serial VFD Tube Driver RoHS:否 制造商:Maxim Integrated 工作电源电压:8 V to 76 V, 3 V to 5.5 V 电源电流:0.9 mA, 700 uA 最大工作温度:+ 125 C 封装 / 箱体:SOIC-20 封装:Tube |
| MAX6921AUI+T | 功能描述:VFD驱动器 12-Output 76V Serial VFD Tube Driver RoHS:否 制造商:Maxim Integrated 工作电源电压:8 V to 76 V, 3 V to 5.5 V 电源电流:0.9 mA, 700 uA 最大工作温度:+ 125 C 封装 / 箱体:SOIC-20 封装:Tube |
| MAX6921AUI-T | 功能描述:VFD驱动器 12-Output 76V Serial VFD Tube Driver RoHS:否 制造商:Maxim Integrated 工作电源电压:8 V to 76 V, 3 V to 5.5 V 电源电流:0.9 mA, 700 uA 最大工作温度:+ 125 C 封装 / 箱体:SOIC-20 封装:Tube |
| MAX6921AWI | 功能描述:VFD驱动器 12-Output 76V Serial VFD Tube Driver RoHS:否 制造商:Maxim Integrated 工作电源电压:8 V to 76 V, 3 V to 5.5 V 电源电流:0.9 mA, 700 uA 最大工作温度:+ 125 C 封装 / 箱体:SOIC-20 封装:Tube |
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