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MIC4807
General Description (Continued)
turned on simultaneously, Gray Code address sequencing
can be applied to Ain, Bin, Cin, while Data-in is held high and
CS is held low. Data-in will be transferred to each address in
turn, without the need to toggle CS. Similarly, a set of outputs
could be simultaneously turned off by setting Data-in low.
Gray Code ensures that no intermediate addresses are
inadvertently accessed. A typical Gray Code is 0, 1, 3, 2, 6,
7, 5, 4.
Each output drive circuit has a high-voltage, power DMOS
device configured as a transconductance loop. This loop
limits the output current to typically 200mA. While current
limiting keeps the output device within its allowable safe-
operating area (SOA), the power dissipation may be exces-
sive. Long-term survival is guaranteed by thermal shutdown.
Micrel
When operated below current limit, the outputs appear as
small-valued resistors (typically 5.1 ? at 25 ° C) connected to
ground. The "ON" resistance (R ON ) has a strong, positive
temperature coefficient (approximately 7500 ppm/ ° C) which
promotes current sharing if two or more outputs are paral-
leled.
Absolute Maximum Ratings (Notes 1, 2 and 3)
Output Voltage (V OUT , OFF) 100V
Supply Voltage (V DD ) 16.5V
Logic Input Voltage (V IN ) –0.3V TO V DD + 0.3
Continuous Output Current (I OUT ) Internally Limited
Power Dissipation (P D , Note 2) Internally Limited
Ambient Temperature (T A ): –40 ° C to +85 ° C
Maximum Junction Temperature (T JMAX ) 150 ° C
Storage Temperature –65 ° C to +150 ° C
θ JA - Plastic DIP 130 ° C/W
Electrical Characteristics:
Test Circuit).
(Note 6) MIC4807BN, T A = 25 ° C, V DD = 15V unless otherwise specified (see
Symbol
V DD
I DD
Parameter
Supply Voltage
Supply Current
Conditions
OE = L (Note 3)
Min
4.5
Typ
5.5
Max
16
10
Units
V
mA
OE = H (Note 4)
1.5
3
mA
V IN (0)
V IN (1)
Logic Input Voltage
4.5V ≤ V DD ≤ 16V
2.0
0.8
V
V
I IN (0)
Logic Input Current for A IN ,
V IN = 0V
–150
–70
–25
μ A
B IN , C IN , and Data-in
I IN (1)
Logic Input Current for CS,
V IN = V DD
25
130
250
μ A
OE, and Clear
I OUT
R ON
Output Leakage Current
Output "ON" Resistance
OE = 0V, V OUT = 80V
Output is ON, V OUT = 0.7V,V DD = 10V
1
5.1
10
7
μ A
?
I SC
Short Circuit Current
Output is ON< V OUT = 50V
10V ≤ V DD ≤ 15V (Note 5)
140
190
250
mA
V OUT
Output Voltage (OFF)
80
V
V OUT
Output Voltage (ON)
Data and Address
I OUT = 50mA,V DD = 10V
I OUT = 100mA, V DD = 10V
V DD = 10V for all timing tests
400
0.26
0.51
0.35
0.7
V
V
ns
Set-up Time
(A, see Timing Diagram )
Data and Address
(B)
50
ns
Hold Time
CS Pulse Width
Turn-on Delay
(C)
(D)
500
2.5
ns
ns
7-4
October 1998
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