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INTEGRATED CIRCUITS  
NE594/SA594  
Vacuum fluorescent display driver  
Product data  
2001 Aug 03  
Supersedes data of 1994 Aug 31  
File under Integrated Circuits, IC11 Handbook  
Philips  
Semiconductors  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
DESCRIPTION  
PIN CONFIGURATIONS  
The NE594/SA594 is a display driver interface for vacuum  
fluorescent displays. The device is comprised of 8 drivers and a bias  
network, and is capable of driving the digits and/or segments of  
most vacuum fluorescent displays.  
N Package  
1
2
3
4
5
6
7
8
9
18  
17  
IN 1  
IN 2  
OUT 1  
OUT 2  
The inputs are designed to be compatible with TTL, DTL, NMOS,  
PMOS or CMOS output circuitry.  
IN 3  
IN 4  
16 OUT 3  
15 OUT 4  
14 OUT 5  
IN 5  
There is an active pull-down circuit on each output so that display  
ghosting is minimized and no external components are required for  
most fluorescent display applications.  
OUT 6  
13  
IN 6  
IN 7  
OUT 7  
OUT 8  
V+  
12  
11  
10  
IN 8  
GND  
FEATURES  
• Digit and/or segment drivers  
TOP VIEW  
• Active output pull-down circuitry  
• High output breakdown voltage  
• Low supply voltage  
1
D Package  
1
2
20  
19  
18  
17  
IN 1  
IN 2  
OUT 1  
OUT 2  
3
IN 3  
IN 4  
OUT 3  
OUT 4  
• Input compatible with all logic outputs  
4
5
IN 5  
16 OUT 5  
15 OUT 6  
6
IN 6  
IN 7  
IN 8  
APPLICATIONS  
7
OUT 7  
OUT 8  
14  
13  
12  
11  
• Digital clocks  
8
• Dashboard displays  
• Panel displays  
V+  
9
GND  
NC  
NC  
10  
TOP VIEW  
NOTE:  
1. SOL – Released in large SO package only.  
SL00485  
Figure 1. Pin Configurations  
ORDERING INFORMATION  
DESCRIPTION  
TEMPERATURE RANGE  
ORDER CODE  
NE594N  
DWG #  
18-Pin Plastic DIP  
0 °C to +70 °C  
0 °C to +70 °C  
SOT102-4  
SOT163-1  
SOT102-4  
SOT163-1  
20-Pin Plastic SO  
NE594D  
18-Pin Plastic DIP  
–40 °C to +85 °C  
–40 °C to +85 °C  
SA594N  
20-Pin Plastic SO  
SA594D  
2
2001 Aug 03  
853-1045 26836  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
EQUIVALENT SCHEMATIC  
X8  
V
CC  
R4  
20 kΩ  
Q3  
Q4  
R5  
4.5 kΩ  
R9  
150 kΩ  
OUT  
R6  
20 k  
D1  
Ω
Q7  
R1  
20 kΩ  
R2  
I
N
Q2  
R8  
10 kΩ  
R7  
10 kΩ  
Q1  
Q6  
R3  
7.5 kΩ  
Q5  
D2  
Ω
20 k  
GND  
SL00486  
Figure 2. Equivalent Schematic  
ABSOLUTE MAXIMUM RATINGS (at 25 °C, unless otherwise noted)  
SYMBOL PARAMETER  
RATING  
45  
UNIT  
V
V
V
Supply voltage  
Output voltage  
Input voltage  
V
CC  
V
CC  
OUT  
IN  
–0.3, +20  
V
Output current  
Each output  
All outputs  
I
50  
200  
mA  
mA  
OUT  
1
Maximum power dissipation, T  
= 25 °C (still-air)  
amb  
P
D
N package  
D package  
1690  
1390  
mW  
mW  
Operating ambient temperature range  
T
amb  
NE594  
SA594  
0 to +70  
–40 to +85  
°C  
°C  
T
Storage temperature range  
+65 to +150  
–150  
°C  
°C  
°C  
stg  
T
j
Maximum junction temperature  
Lead soldering temperature (10 sec max)  
T
sld  
230  
NOTE:  
1. Derate above 25 °C, at the following rates:  
N package at 13.5 mW/°C  
D package at 11.1 mW/°C  
3
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
DC ELECTRICAL CHARACTERISTICS  
V
CC  
=+4.75 V to +40 V; T  
= 0 °C to +70 °C (NE), T = –40 °C to +85 °C (SA), unless otherwise stated.  
amb  
amb  
LIMITS  
SYMBOL  
PARAMETER  
Supply voltage range  
TEST CONDITIONS  
Min  
UNIT  
Typ  
35  
3
Max  
40  
6
V
4.75  
V
mA  
mA  
V
CC  
CCH  
CCL  
I
I
Supply current (all outputs HIGH)  
Supply current (all outputs LOW)  
Input voltage range  
V
V
= 40 V; V = 3.5 V  
IN  
CC  
= 40 V; V = 0.4 V  
0.4  
1
CC  
IN  
V
IN  
V
IH  
V
IL  
0
15  
Input voltage to ensure logic ‘1’  
Input voltage to ensure logic ‘0’  
Input current to ensure logic ‘1’  
Input current to ensure logic ‘0’  
Input current  
2.6  
V
0.8  
V
I
I
I
100  
µA  
µA  
µA  
µA  
mA  
IH  
10  
IL  
V
V
= 2.6 V  
= 5.0 V  
= 15.0 V  
60  
130  
330  
1.3  
IN  
IN  
180  
0.68  
IN  
V
IN  
V
= 3.5 V;  
= –25 mA  
IN  
T
= 25 °C  
V
–1.5  
V
CC  
V
CC  
V
CC  
–1.1  
V
V
amb  
CC  
I
OUT  
V
OH  
Output high voltage  
V
with respect to V  
Over temp.  
V
–2  
–1  
–1.3  
–0.8  
OUT  
CC  
CC  
CC  
V
= 3.5 V; I  
= 0; T = 25 °C;  
amb  
IN  
OUT  
V
V
Output high, no load voltage  
Output ‘OFF’ voltage level  
Available output current  
Output pull-down current  
Output leakage current  
V
V
OH  
V
with respect to V  
CC  
OUT  
V
= 0.8 V; I = 0  
OUT  
10  
200  
400  
mV  
mA  
µA  
µA  
OFF  
IN  
V
= 35 V; V = 3.5 V; V  
= 30 V;  
OUT  
CC  
IN  
I
I
I
–35  
100  
OH  
T
amb  
= 25 °C  
V
= V  
= 35 V; inputs open  
200  
OUT  
CEX  
CC  
OUT  
T
= 25 °C; V = 0.4 V  
–1  
–1  
amb  
IN  
V
= 40 V; V  
= 0 V  
OUT  
CC  
AC ELECTRICAL CHARACTERISTICS  
V
CC  
= 35 V; T  
= 25 °C.  
amb  
LIMITS  
Typ  
SYMBOL  
PARAMETER  
Propagation delay  
TEST CONDITIONS  
UNIT  
µs  
Min  
Max  
t
t
50% V to 50% V  
1
3
5
PLH  
PHL  
IN  
OUT  
OUT  
low–to–high output transition  
Propagation delay  
high–to–low output transition  
50% V to 50% V  
10  
µs  
IN  
t
t
Output rise time  
Output fall time  
10% V  
90% V  
to 90% V  
0.5  
1.5  
3
5
µs  
µs  
R
OUT  
OUT  
OUT  
to 10% V  
F
OUT  
4
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
SWITCHING TIMES OF DRIVERS  
P
RR  
5 V  
V
IN  
0 V  
t
PDLH  
34 V  
90%  
10%  
t
PDLH  
V
OUT  
50%  
50%  
10%  
90%  
0 V  
t
R
t
F
SL00487  
Figure 3. Switching Times of Drivers  
V
= 35 V  
CC  
V
V
OUT  
IN  
P
RR = 10 kHz  
F
R
L
t
= t = (50 ns)  
R
C
L
R
C
= 10 kΩ  
= 50 pF  
L
L
SL00488  
Figure 4. Test Circuit  
5
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
TYPICAL PERFORMANCE CHARACTERISTICS  
I
IN  
vs V  
I
vs Temperature  
IN  
CCH  
5
4
1000  
800  
600  
400  
V
CC = 40V  
3
2
I
CCH  
(mA)  
I
IN  
(µA)  
200  
0
1
0
–40  
0
25  
50  
85  
0
5
10  
15  
20  
o
V
(V)  
TEMPERATURE  
C
IN  
Output Voltage vs Output Current  
I
vs V (All inputs High)  
CC  
CC  
5
V
CC  
4
3
V
CC –1  
CC –2  
o
T
25 C  
A =  
V
V
OUT  
(V)  
I
CCH  
(mA)  
2
V
V
V
CC –3  
CC –4  
CC –5  
o
T
25 C  
A =  
1
0
0
10  
20  
30  
(V)  
40  
50  
0
10  
20  
30  
(mA)  
40  
50  
V
I
CC  
OUT  
SL00489  
Figure 5. Typical Performance Characteristics  
6
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
2
+ V + 16 TO + 40V  
78mG  
DIMMER  
ADJUST  
+
4
R8  
0.47µF  
1
1N4002  
R7  
5.6K  
R9  
15K  
50K  
78  
HV12  
40V  
RMS  
2
1N914  
3
T
1
.1µF  
10  
ALARM  
MIN  
ENABLE  
N.O.  
SET  
22  
11  
12  
ALARM  
OFF  
N.O.  
N.C.  
HOUR  
SET  
N.O.  
SNOOZE  
18  
19  
Q1 2N222  
ALARM  
SET  
N.O.  
+12V  
13  
R6  
100Ω  
14  
17  
25  
MK  
50250  
15  
23  
R1  
100K  
+12V  
3
4
24  
8Ω  
R2  
10K  
8
2
3
2
9
27  
26  
8
1
1/2  
LM393  
5
+12V  
7
6
28  
1
R3  
10K  
6
5
7
1/2  
LM393  
4
R4  
100K  
R5  
1 MEG  
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
+12V  
NE/SA594  
10 11 12 13 14 15 16 17 18  
NE/SA594  
10 11 12 13 14 15 16 17 18  
+V  
+V  
W
5.6Ω 1  
F
I
L
A
M
S
A A/P  
A
S
E
C
O
L
D 10 10  
S
C
10  
1
C
S
E
E
S
E
G
S
E
F
S
E
B
S
E
F
I
L
ITRON JJA  
CLOCK DISPLAY  
M
S
D
I
S
E
HR HR H  
O MIN MIN  
L
Z, 5.6V  
D
D
I9  
D
D
E
G
E
G
G
I
T
G
S
E
G
G
I
G
I
I
G
I
E
L
D
O
N
D
I
I
G
I
I
G
I
G
G
G
G
G
IN 752  
T
T
T
T
T
2
G
I
W
5.6Ω 1  
T
SL00490  
Figure 6. Typical Application: Digital Clock With Alarm  
7
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
DIP18: plastic dual in-line package; 18 leads (300 mil); long body  
SOT102-4  
8
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
SO20: plastic small outline package; 20 leads; body width 7.5 mm  
SOT163-1  
9
2001 Aug 03  
Philips Semiconductors  
Product specification  
Vacuum fluorescent display driver  
NE594/SA594  
Data sheet status  
Product  
status  
Definitions  
[1]  
Data sheet status  
[2]  
Objective data  
Development  
This data sheet contains data from the objective specification for product development.  
Philips Semiconductors reserves the right to change the specification in any manner without notice.  
Preliminary data  
Product data  
Qualification  
Production  
This data sheet contains data from the preliminary specification. Supplementary data will be  
published at a later date. Philips Semiconductors reserves the right to change the specification  
without notice, in order to improve the design and supply the best possible product.  
This data sheet contains data from the product specification. Philips Semiconductors reserves the  
right to make changes at any time in order to improve the design, manufacturing and supply.  
Changes will be communicated according to the Customer Product/Process Change Notification  
(CPCN) procedure SNW-SQ-650A.  
[1] Please consult the most recently issued data sheet before initiating or completing a design.  
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL  
http://www.semiconductors.philips.com.  
Definitions  
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For  
detailed information see the relevant data sheet or data handbook.  
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one  
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or  
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended  
periods may affect device reliability.  
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips  
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or  
modification.  
Disclaimers  
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can  
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications  
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.  
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,standard  
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no  
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these  
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless  
otherwise specified.  
Koninklijke Philips Electronics N.V. 2001  
Contact information  
All rights reserved. Printed in U.S.A.  
For additional information please visit  
http://www.semiconductors.philips.com.  
Fax: +31 40 27 24825  
Date of release: 12-01  
9397 750 09234  
For sales offices addresses send e-mail to:  
sales.addresses@www.semiconductors.philips.com.  
Document order number:  
Philips  
Semiconductors