MIC4807 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 80V 8-Channel Addressable Low-Side Driver

MIC4807
Micrel
MIC4807
80V 8-Channel Addressable Low-Side Driver
General Description
The MIC4807 is an 80V, 8-channel, addressable low side
driver with latches and TTL/CMOS compatible logic inputs.
Each logic input is composed of a comparator with a 1.4V
bandgap-derived reference serving as the trip point. The
addresses (A_IN, B_IN, and C_IN) and Data-in logic inputs have an
internal 50µA pull-up current source, while the Output Enable
(OE), Chip Select (CS), and Clear logic inputs have an
internal 75µA pull-down sink. If the logic lines to the MIC4807
are severed, these currents guarantee that the outputs will
turn OFF.
Individual latches in the MIC4807 are selected by a binary
address presented at inputs A_IN, B_IN, and C_IN. Data-in is
directed to the addressed latch while CS is held low, allowing
an individual output to be pulse-width modulated. When CS
is set high again, the last Data-in is stored in the latch. If Data-
in = "1", the addressed output is turned on, and if Data-in = "0",
the addressed output is turned off.
Information presented to Data-in and the address inputs is
transferred to the latches while CS is pulled low. For
application, where several outputs must be (Continued)
Pin Diagram
Features
• 4.5V to 16V Operation
• Eight 80V 100mA Outputs
• Off-state Leakage less than 10µA at 25°C
• Short-Circuit Proof
• Thermal Shutdown with Hysteresis
•
DMOS
Output
Devices
(R
ON
≤
7Ω
at
25°C)
Applications
• Lamp Drivers
• Solenoid Drivers
• Display Drivers
-Electroluminescent
-Vacuum Fluorescent
-Plasma
• Relay Drivers
• Print Head Drivers
• Heater Drivers
• Power Semiconductor Drivers
• Security Systems
• Environmental Controls
• Process Controllers
Ordering Information
HVOUT2
HVOUT3
VDD
OE
Ground
CS
Clear
HVOUT4
HVOUT5
1
18 _HVOUT1
2
17 _HVOUT0
3
16 _Data-in
4 MIC4807 15 _AIN
5
14 _BIN
6
13 _CIN
7
12 _VDD
8
11 _HVOUT7
9
10 _HVOUT6
Part
Operating
Package
7
Number Temperature-Range
MIC4807BN
-40°C to 85°C
18-Pin Plastic DIP
Block Diagram
VDD 12
{ ^Addressing
AIN 15
BIN 14
CIN 13
Data-in 16
Address
Decoder
Thermal
Shutdown
Latches
Current
Limit
Driver
•
•
•
•
•
•
Driver
17 HVOUT₀
18 HVOUT₁
1 HVOUT₂
2 HVOUT₃
8 HVOUT₄
9 HVOUT₅
10 HVOUT₆
11 HVOUT₇
Ground 5
6
CS
7
4
Clear
OE
October 1998
7-3