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参数资料
| 型号： | MAX1576 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 480mA White LED 1x/1.5x/2x Charge Pump for Backlighting and Camera Flash |
| 中文描述： | 480mA白光LED 1倍/1.5倍/2倍电荷泵，用于背光和相机闪光灯 |
| 文件页数： | 4/22页 |
| 文件大小： | 2258K |
| 代理商： | MAX1576 |
MC14489B
4
MOTOROLA
AC ELECTRICAL CHARACTERISTICS
(TJ = – 40
°
to 130
°
C*, CL = 50 pF, Input tr = tf = 10 ns)
Symbol
Parameter
VDD
V
Guaranteed
Limit
Unit
fclk
Serial Data Clock Frequency, Single Device or Cascaded Devices
NOTE: Refer to Clock tw below
(Figure 1)
3.0
4.5
5.5
dc to 3.0
dc to 4.0
dc to 4.0
MHz
tPLH,
tPHL
Maximum Propagation Delay, Clock to Data Out
(Figures 1 and 5)
3.0
4.5
5.5
140
80
80
ns
tTLH,
tTHL
Maximum Output Transistion Time, Data Out
(Figures 1 and 5)
3.0
4.5
5.5
70
50
50
ns
fR
Refresh Rate — Bank 1 through Bank 5
(Figures 2 and 6)
3.0
4.5
5.5
NA
700 to 1900
700 to 1900
Hz
Cin
Maximum Input Capacitance — Data In, Clock, Enable
—
10
pF
* See Thermal Considerations section.
TIMING REQUIREMENTS
(TJ = – 40
°
to 130
°
C*, Input tr = tf = 10 ns unless otherwise indicated
)
Symbol
Parameter
VDD
V
Guaranteed
Limit
Unit
tsu, th
Minimum Setup and Hold Times, Data In versus Clock
(Figure 3)
3.0
4.5
5.5
50
40
40
ns
tsu, th,
trec
Minimum Setup, Hold, ** and Recovery Times, Enable versus Clock
(Figure 4)
3.0
4.5
5.5
150
100
100
ns
tw(L)
Minimum Active–Low Pulse Width, Enable
(Figure 4)
3.0
4.5
5.5
4.5
3.4
3.4
μ
s
tw(H)
Minimum Inactive–High Pulse Width, Enable
(Figure 4)
3.0
4.5
5.5
300
150
150
ns
tw
Minimum Pulse Width, Clock
(Figure 1)
3.0
4.5
5.5
167
125
125
ns
tr, tf
Maximum Input Rise and Fall Times — Data In, Clock, Enable
(Figure 1)
3.0
4.5
5.5
1
1
1
ms
*See Thermal Considerations section.
**For a high–speed 8–Clock access, th for Enable is determined as follows:
VDD = 3 to 4.5 V, fclk > 1.78 MHz: th = 4350 – (7500/fclk)
VDD = 4.5 to 5.5 V, fk > 2.34 MHz: th = 3300 – (7500/fclk)
where th is in ns and fclk is in MHz.
NOTES:
1. This restriction does NOT apply for fclk rates less than those listed above. For “slow” fclk rates, use the th limits in the above table.
2. This restriction does NOT apply for an access involving more than 8 Clocks. For > 8 Clocks, use the th limits in the above table.
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