MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33993/D
Rev 2.0, 07/2003
Advance Information
Multiple Switch Detection Interface
The 33993 Multiple Switch Detection Interface is designed to detect the
closing and opening of up to 22 switch contacts. The switch status, either open
or closed, is transferred to the microprocessor unit (MCU) through a serial
peripheral interface (SPI). The device also features a 22-to-1 analog multiplexer
for reading inputs as analog. The analog input signal is buffered and provided on
the AMUX output pin for the MCU to read.
The 33993 device has two modes of operation, Sleep and Normal. The Sleep
mode provides low quiescent current and enables the wake-up features of the
device. Normal mode allows programming of the device and supplies switch
contacts with pull-up or pull-down current as it monitors switch change of state.
The 33993 is packaged in the 32-pin wide-body SOIC, reducing circuit board
area. Low quiescent current makes the 33993 ideal for automotive and industrial
products requiring low sleep state currents. The internal block diagram of the
33993 is illustrated in
Figure 1,
page 2.
33993
MULTIPLE SWITCH
DETECTION INTERFACE
Features
•
•
•
•
•
•
•
•
•
Designed to Operate 5.5 V
≤
V
PWR
≤
26 V
Switch Input Voltage Range -14 V to V
PWR
, 40 V Max
Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI Protocol
Selectable Wake-Up on Change of State
Selectable Wetting Current (16 mA or 2.0 mA)
8 Programmable Inputs (Switches to Battery or Ground)
14 Switch-to-Ground Inputs
V
PWR
Standby Current 100
µA
Typical, V
DD
Standby Current 20
µA
Typical
Active Interrupt (
INT
) on Change-of-Switch State
DWB SUFFIX
CASE 1324
32-LEAD SOICW
ORDERING INFORMATION
Device
MC33993DWB/R2
Temperature
Range (T
A
)
-40
°
C to 125
°
C
Package
32 SOICW
33993 Simplified Application Diagram
V
DD
VBAT
Power Supply
LVI
VBAT
SP0
SP1
VBAT
SP7
33993
V
PWR
V
DD
V
DD
WAKE
SI
SCLK
CS
SO
INT
AMUX
Enable
Watchdog
Reset
MCU
SG0
SG1
MOSI
SCLK
CS
MISO
INT
AN0
SG12
GND
SG13
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Motorola, Inc. 2003
5.0 V
V
PWR
V
PWR
16.0
mA
SP0
SP1
SP2
SP3
SP4
SP5
SP6
SP7
16.0
mA
To
+
2.0 4.0 V
–
SPI
mA Ref
Comparator
5.0 V
V
PWR
5.0 V
To
+
4.0 V
–
SPI
Ref
Comparator
WAKE
WAKE
Control
SP0
V
PWR
V
PWR
, V
DD
, 5.0 V
POR
Bandgap
Sleep PWR
V
PWR
V
DD
GND
2.0
mA
16.0
mA
To
+
2.0 4.0 V
–
SPI
mA Ref
Comparator
V
PWR
V
PWR
16.0
mA
2.0
mA
SP7
5.0 V
Oscillator
and
Clock Control
V
PWR
5.0 V
Temperature
Monitor and
Control
5.0 V
125 kΩ
V
PWR
V
PWR
16.0
mA
SG0
SG1
SG2
SG3
SG4
SG5
SG6
SG7
SG8
SG9
SG10
SG11
SG12
SG13
V
PWR
V
PWR
16.0
mA
2.0
mA
2.0
mA
SG0
SPI Interface
and Control
V
DD
125 kΩ
INT
INT
Control
V
DD
MUX Interface
40
µA
CS
V
DD
SCLK
SI
SO
SG13
To
+
4.0 V
–
SPI
Ref
Comparator
+
V
DD
Analog Mux
Output
–
AMUX
Figure 1. 33993 Simplified Internal Block Diagram
33993/D
2
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
GND
SI
SCLK
CS
SP0
SP1
SP2
SP3
SG0
SG1
SG2
SG3
SG4
SG5
SG6
V
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
SO
V
DD
AMUX
INT
SP7
SP6
SP5
SP4
SG7
SG8
SG9
SG10
SG11
SG12
SG13
WAKE
PIN FUNCTIONAL DESCRIPTION
Pin
1
2
3
4
5–8
25–28
9–15,
18–24
16
17
29
30
31
32
Pin Name
GND
SI
SCLK
CS
SP0–3
SP4–7
SG0–6,
SG13–7
V
PWR
WAKE
INT
AMUX
V
DD
SO
Formal Name
Ground
SPI Slave In
Serial Clock
Chip Select
Programmable Switches 0–7
Switch-to-Ground Inputs 0–13
Battery Input
Wake-Up
Interrupt
Analog Multiplex Output
Voltage Drain Supply
SPI Slave Out
Description
Ground for logic, analog, and switch to battery inputs.
SPI control data input pin from MCU to 33993.
SPI control clock input pin.
SPI control chip select input pin from MCU to 33993. Logic 0 allows data to be
transferred in.
Programmable switch-to-battery or switch-to-ground input pins.
Switch-to-ground input pins.
Battery supply input pin. Pin requires external reverse battery protection.
Open drain wake-up output. Designed to control a power supply enable pin.
Open-drain output to MCU. Used to indicate input switch change of state.
Analog multiplex output.
3.3/5.0 V supply. Sets SPI communication level for SO driver.
Provides digital data from 33993 to MCU.
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33993/D
3
MAXIMUM RATINGS
All voltages are with respect to ground unless otherwise noted.
Rating
V
DD
Supply Voltage
CS,
SI, SO, SCLK,
INT
, AMUX (Note 1)
WAKE
(Note 1)
Symbol
–
–
–
–
–
–
Value
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 40
-0.3 to 50
-14 to 40
6.0
Unit
V
DC
V
DC
V
DC
V
DC
V
DC
MHz
V
V
PWR
Supply Voltage (Note 1)
Switch Input Voltage Range
Frequency of SPI Operation (V
DD
= 5.0 V)
ESD Voltage (Note 2)
Human Body Model (Note 3), (Note 4)
Machine Model (Note 5)
Storage Temperature
Operating Case Temperature
Operating Junction Temperature
Power Dissipation (T
A
= 25
°
C) (Note 6)
Thermal Resistance
Junction to Ambient
Junction to Lead
V
ESD1
V
ESD2
T
STG
T
C
T
J
P
D
R
θ
JA
R
θ
JL
±4000
±200
-55 to 150
-40 to 125
-40 to 150
1.7
°
C
°
C
°
C
W
°
C/W
74
25
Notes
1. Exceeding these limits may cause malfunction or permanent damage to the device.
2. ESD data available upon request.
3. ESD1 testing is performed in accordance with the Human Body Model (C
ZAP
= 100 pF, R
ZAP
= 1500
Ω).
4.
5.
6.
All pins when tested individually.
ESD2 testing is performed in accordance with the Machine Model (C
ZAP
= 200 pF, R
ZAP
= 0
Ω).
Maximum power dissipation at T
J
=150
°
C junction temperature with no heat sink used.
33993/D
4
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
STATIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions of 3.1 V
≤
V
DD
≤
5.25 V, 8.0 V
≤
V
PWR
≤
16 V, -40°C
≤
T
C
≤
125°C, unless otherwise noted.
Where applicable, typical values reflect the parameter’s approximate average value with V
PWR
= 13 V, T
A
= 25°C.
Characteristic
Symbol
Min
Typ
Max
Unit
POWER INPUT
Supply Voltage
Supply Voltage Range Quasi-Functional (Note 7)
Fully Operational
Supply Voltage Range Quasi-Functional (Note 7)
Supply Current
All Switches Open, Normal Mode, Tri-State Disabled
Sleep State Supply Current
Scan Timer = 64 ms, Switches Open
Logic Supply Voltage
Logic Supply Current
All Switches Open, Normal Mode
Sleep State Logic Supply Current
Scan Timer = 64 ms, Switches Open
I
DD
(
ss
)
–
10
20
V
DD
I
DD
–
0.25
0.5
µA
I
PWR
(
ss
)
40
3.1
70
–
100
5.25
V
mA
V
PWR
(
qf
)
V
PWR
(
fo
)
V
PWR
(
qf
)
I
PWR
(
on
)
–
2.0
4.0
µA
5.5
8.0
26
–
–
–
8.0
26
40
mA
V
SWITCH INPUT
Pulse Wetting Current Switch-to-Battery (Current Sink)
Pulse Wetting Current Switch-to-Ground (Current Source)
Sustain Current Switch-to-Battery Input (Current Sink)
Sustain Current Switch-to-Ground Input (Current Source)
Sustain Current Matching Between Channels on Switch-to-Ground Inputs
I
SUS(MAX)
- I
SUS(MIN)
I
SUS(MIN)
X 100
I
offset
V
offset
-10
V
OL
–
V
OH
V
DD
- 0.1
V
th
V
in
T
LIM
T
LIM(
hys
)
3.70
-14
155
5.0
–
4.0
–
–
10
–
4.3
40
185
15
V
V
10
30
V
2.5
10
mV
I
Pulse
I
Pulse
I
sustain
I
sustain
I
Match
–
-2.0
2.0
1.4
4.0
2.0
µA
mV
12
12
1.8
1.8
15
16
2.0
2.0
18
18
2.2
2.2
mA
mA
mA
mA
%
Input Offset Current when Selected as Analog
Input Offset Voltage when Selected as Analog
V
(SP&SGinputs)
to AMUX Output
Analog Operational Amplifier Output Voltage
Sink 250
µA
Analog Operational Amplifier Output Voltage
Source 250
µA
Switch Detection Threshold
Switch Input Voltage Range
Temperature Monitor (Note 8), (Note 9)
Temperature Monitor Hysteresis (Note 9)
°
C
°
C
Notes
7. Device operational. Table parameters may be out of specification.
8. Thermal shutdown of 16 mA pull-up and pull-down current sources only. 2.0 mA current source/sink and all other functions remain active.
9. This parameter is guaranteed by design but is not production tested.
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33993/D
5
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