MIC4807

Micrel

7-4

October 1998

Test Circuit).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Supply Voltage

4.5

16

V

Supply Current

OE = L (Note 3)

5.5

10

mA

OE = H (Note 4)

1.5

3

mA

Logic Input Voltage

4.5V

0.8

V

2.0

V

–150

–70

–25

µA

Logic Input Current for CS,

25

130

250

µA

OE, and Clear

Output Leakage Current

1

10

µA

Output "ON" Resistance

5.1

7

Ω

Short Circuit Current

140

190

250

mA

10V

Output Voltage (OFF)

80

V

Output Voltage (ON)

0.26

0.35

V

0.51

0.7

V

Data and Address

400

ns

Set-up Time

(A, see Timing Diagram)

Data and Address

(B)

50

ns

Hold Time

CS Pulse Width

(C)

500

ns

Turn-on Delay

(D)

2.5

ns

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.

When operated below current limit, the outputs appear as

small-valued resistors (typically 5.1

Ω at 25°C) connected to

temperature coefficient (approximately 7500 ppm/

°C) which

promotes current sharing if two or more outputs are paral-

leled.

100V

16.5V

Internally Limited

Internally Limited

–40

°C to +85°C

150

°C

Storage Temperature

–65

°C to +150°C

θ

130

°C/W