JBL MS-A5001 Service Manual ▷ View online
MIC2981/2982
Micrel, Inc.
MIC2981/2982
High-Voltage High-Current Source Driver Array
General
The MIC2981/82 is an 8-channel, high-voltage, high-current
source driver array ideal for switching high-power loads from
logic-level TTL, CMOS, or PMOS control signals.
These drivers can manage multiple loads of up to 50V and
These drivers can manage multiple loads of up to 50V and
500mA, limited only by package power dissipation.
Micrel’s MIC2981/82 features inputs compatible with 5V TTL
Micrel’s MIC2981/82 features inputs compatible with 5V TTL
and 5V to 15V CMOS or PMOS logic outputs. Micrel’s
dual-marked device replaces either UDN2981 or UDN2982
devices.
The MIC2981/82 is available in the 18-pin plastic DIP and
The MIC2981/82 is available in the 18-pin plastic DIP and
18-lead wide SOP package. Both devices operate in the
industrial temperature range.
Functional Diagrams
OUT1
OUT2
OUT3
OUT4–OUT7
OUT8
MIC2981
MIC2982
4
IN1
IN2
IN3
IN4–IN7
IN8
GND
V
S
Features
• Output voltage to 50V
• Output current to 500mA
• Transient-protected outputs
• Integral clamp diodes
• TTL, CMOS, or PMOS compatible inputs
Applications
• Relay and solenoid switching
• Stepping motor
• LED and incandescent displays
IN
OUT
V
S
GND
1.5k
20k
800
1.8k
Typical MIC2891/2982 Source Driver
Ordering Information
Part Number
Reference
Manufacturing*
PbFree
Temperature Range
Package
MIC2981BN**
MIC2981/82BN
MIC2981/82YN
–40ºC to +85ºC
18-pin DIP
MIC2982BN**
MIC2981/82BN
MIC2981/82YN
–40ºC to +85ºC
18-pin DIP
MIC2981BWM**
MIC2981/82BWM
MIC2981/82YWM
–40ºC to +85ºC
18-pin wide SOP
MIC2982BWM**
MIC2981/82BWM
MIC2981/82YWM
–40ºC to +85ºC
18-pin wide SOP
* Order entry P/N.
**Orders for MIC2981BN or MIC2982BN will be filled with dual-marked MIC2981/82BN.
**Orders for MIC2981YN or MIC2982YN will be filled with dual-marked MIC2981/82YN.
**Orders for MIC2981BWM or MIC2982BWM will be filled with dual-marked MIC2981/82BWM.
**Orders for MIC2981YWM or MIC2982YWM will be filled with dual-marked MIC2981/82YWM.
40
MS-A5001
MIC2981/2982
Micrel, Inc.
MIC2981/2982
2
June 2005
Pin Configuration
2
IN2
OUT2
17
3
IN3
OUT3
16
4
IN4
OUT4
15
5
IN5
OUT5
14
6
IN6
OUT6
13
7
IN7
OUT7
12
1
IN1
OUT1
18
8
IN8
OUT8
11
9
V
S
GND
10
18-Pin DIP (N)
18-Pin Wide SOP (WM)
Pin No.
Pin No.
Pin Name
Pin Function
1–8
IN1–IN8
Input 1 through Input 8: Base drive to driver input transistor.
9
V
S
Supply Input
10
GND
Ground
11–18
OUT8–OUT1
Output 8 through Output 1: Emitter of Darlington driver output.
Pin Description
41
MS-A5001
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer
74HC/HCT238
FEATURES
•
Demultiplexing capability
•
Multiple input enable for easy expansion
•
Ideal for memory chip select decoding
•
Active HIGH mutually exclusive outputs
•
Output capability: standard
•
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT238 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT238 decoders accept three binary
weighted address inputs (A
weighted address inputs (A
0
, A
1
, A
2
) and when enabled,
provide 8 mutually exclusive active HIGH outputs
(Y
(Y
0
to Y
7
).
The “238” features three enable inputs: two active LOW
(E
(E
1
and E
2
) and one active HIGH (E
3
). Every output will be
LOW unless E
1
and E
2
are LOW and E
3
is HIGH.
This multiple enable function allows easy parallel
expansion of the “238” to a 1-of-32 (5 lines to 32 lines)
decoder with just four “238” ICs and one inverter.
expansion of the “238” to a 1-of-32 (5 lines to 32 lines)
decoder with just four “238” ICs and one inverter.
The “238” can be used as an eight output demultiplexer by
using one of the active LOW enable inputs as the data
input and the remaining enable inputs as strobes. Unused
enable inputs must be permanently tied to their
appropriate active HIGH or LOW state.
using one of the active LOW enable inputs as the data
input and the remaining enable inputs as strobes. Unused
enable inputs must be permanently tied to their
appropriate active HIGH or LOW state.
The “238” is identical to the “138” but has non-inverting
outputs.
outputs.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µ
W):
P
D
= C
PD
×
V
CC
2
×
f
i
+ ∑
(C
L
×
V
CC
2
×
f
o
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
(C
L
×
V
CC
2
×
f
o
) = sum of outputs
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
2. For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
−
1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PHL/
t
PLH
propagation delay
C
L
= 15 pF; V
CC
= 5 V
A
n
to Y
n
14
18
ns
E
3
to Y
n
16
20
ns
E
n
to Y
n
17
21
ns
C
I
input capacitance
3.5
3.5
pF
C
PD
power dissipation capacitance per package
notes 1 and 2
72
76
pF
42
MS-A5001
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer
74HC/HCT238
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
1, 2, 3
A
0
to A
2
address inputs
4, 5
E
1
, E
2
enable inputs (active LOW)
6
E
3
enable input (active HIGH)
8
GND
ground (0 V)
15, 14, 13, 12, 11, 10, 9, 7
Y
0
to Y
7
outputs (active HIGH)
16
V
CC
positive supply voltage
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
(a)
(b)
43
MS-A5001
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