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PDF U6820BM Data sheet ( Hoja de datos )

Número de pieza U6820BM
Descripción Dual Quad BCDMOS Driver IC
Fabricantes ATMEL Corporation 
Logotipo ATMEL Corporation Logotipo



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Features
Four Short-circuit-protected High-side Drivers with a Maximum Current Capability of
50 mA Each
Four Short-circuit-protected Low-side Drivers with a Maximum Current Capability of
50 mA Each
ON Resistance High Side Ron < 10 Versus Total Temperature Range
ON Resistance Low Side Ron < 7 Versus Total Temperature Range
Short-circuit Detection of Each Driver Stage
Disabling of Driver Stages in the Case of Short-circuit and Overtemperature Detection
Independent Control of Each Driver Stage via an 8-bit Shift Register
Status Output Reports Short-circuit Condition
Status Output Reports when All Loads Are Switched Off
Timing of Status Output Reset Signalizes Failure Mode
Temperature Protection in Conjunction with Short-circuit Detection
Description
The U6820BM is a driver interface in BCDMOS technology with 8 independent driver
stages having a maximum current capability of 50 mA each. Its partitioning into 4
high-side and 4 low-side driver stages allows an easy connection of either 4 half-
bridges or 2 H-bridges on the pc board. The U6820BM communicates with a micro-
controller via an 8-bit serial interface. Integrated protection against short circuit and
overtemperature give added value. EMI protection and 2-kV ESD protection together
with automotive qualification referring to conducted interference (ISO/TR 7637/1)
make this IC ideal for both automotive and industrial applications.
Figure 1. Block Diagram
VCC
6
HS4 HS3 HS2 HS1
16 9 8 1
Dual Quad
BCDMOS
Driver IC
U6820BM
14
STATUS
CS 11
CLK 12
DI 13
V CC
Current
limiter
Current
limiter
HHHH L L L L
SSSSSSSS
43 2143 21
Input Register
Control
logic
V CC
Current
limiter
Current
limiter
Current
limiter
Current
limiter
3
VS
Thermal protection
V CC
Power-on reset
Current
limiter
Current
limiter
V CC
5 GND S
4
GNDCC
15
LS4
10
LS3
72
LS2 LS1
Rev. 4527ABCD03/02
1

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U6820BM pdf
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Figure 3. Data Transfer Timing Diagram
CLK
t
CSCLK
tCLKP
t CLKH
t CLKCS
LSB
t
CLKL
DI
tDICLK t DIH/L
CS
tr
90 %
tf
90 %
10%
U6820BM
50%
MSB
50%
t CS
50%
t
CLKCSH
Table 2. AC Characteristics for Testing
Specification
tr (rise)
tf (fall)
tCLKP
tCLKH
tCLKL
tCLKCS
tCSCLK
tDICLK
tDIH/L
tCLKCSH
tCS
Conditions
10% to 90% VCC on CLK, DI and CS
10% to 90% VCC on CLK, DI and CS
1/2 VCC
1/2 VCC
1/2 VCC
1/2 VCC
1/2 VCC
1/2 VCC
1/2 VCC
1/2 VCC
1/2 VCC
Minimum
250
100
100
150
100
80
100
100
250
Maximum
10
10
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4527ABCD03/02
5

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Corporate Headquarters
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e-mail
Web Site
http://www.atmel.com
© Atmel Corporation 2002.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Companys standard warranty
which is detailed in Atmels Terms and Conditions located on the Companys web site. The Company assumes no responsibility for any errors
which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does
not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted
by the Company in connection with the sale of Atmel products, expressly or by implication. Atmels products are not authorized for use as critical
components in life support devices or systems.
Atmel® is the registered trademark of Atmel.
Other terms and product names may be the trademarks of others.
Printed on recycled paper.
4527ABCD03/02
xM

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