HANTRONIX HT16515 Datasheet

1/4 to 1/12 Duty VFD Controller

Features

·

Logic voltage: 3.0V~5.5V

·

High-voltage output: VDD-35V max.

·

Multiple display
(16-segment & 12-digit to 24-segment & 4-digit)

·

16´2 matrix key scanning

·

8 steps dimmer circuit

Applications

·

Consumer products panel function control

·

Industrial measuring instrument panel function control

General Description

HT16515 is a VFD (Vacuum Fluorescent Display) con
troller/driver that is driven on a 1/4 to 1/12 duty factor. It
consists of 16 segment output lines, 4 grid output lines,
8 segment/grid output drive lines, 4 LED output ports, a
control circuit, a displaymemory, and a key scan circuit.

HT16515

·

4 LED output ports

·

No external resistors necessary for driver output
(provides PMOS open-drain and pull-low resistor
output)

·

Serial interface with MCU (CLK, CS, DI, DO)

·

44-pin QFP package

·

Other similarapplications for panel function control

Serial data inputs to the HT16515 through a three-line

­serial interface. This VFD controller/driver is an ideal
MCU peripheral device.

Block Diagram

D I

D O

C L K

C S

O S C

K e y 0 ~ K e y 1

S e r i a l I / F

O S C

C o m m a n d D e c o d e r

D i s p l a y R A M

2 4 - B i t

1 2 W o r d s

´

T i m i n g G e n e r a t o r

K e y S c a n

K e y D a t a M e m o r y

( 2

1 6 )

´

4 - B i t L a t c h

L E D 0 ~ L E D 3

2 4 - B i t

O u t p u t L a t c h

1 2 - B i t

S h i f t R e g i s t e r

2 4 1 6

8

D a t a

S e l e c t o r

8

1 2

D i m m i n g C i r c u i t

V D D V S S V E E

S e g m e n t

D r i v e r

8

M u l t i p l e x e d

D r i v e r

4

G r i d

D r i v e r

S e g 1 / K S 1

S e g 1 6 / K S 1 6

S e g 1 7 / G r i d 1 2

S e g 2 4 / G r i d 5

G r i d 1

G r i d 4

Rev. 1.30 1 November 21, 2006

Pin Assignment

S e g 2 0 / G r i d 9
S e g 2 1 / G r i d 8
S e g 2 2 / G r i d 7

S e g 2 3 / G r i d 6

S e g 2 4 / G r i d 5

G r i d 4
G r i d 3

G r i d 2
G r i d 1

V D D

V S S

HT16515

S e g 1 0 / K S 1 0

S e g 1 1 / K S 1 1

S e g 1 2 / K S 1 2

S e g 1 3 / K S 1 3

S e g 1 4 / K S 1 4

S e g 1 5 / K S 1 5

S e g 1 6 / K S 1 6

V E E

S e g 1 7 / G r i d 1 2

S e g 1 8 / G r i d 1 1

S e g 1 9 / G r i d 1 0

3 4
3 5

3 6

3 7
3 8

3 9
4 0

4 1
4 2

4 3
4 4

1 2

L E D 0

L E D 1

3 4 5

L E D 2

L E D 3

0 6  $ #  #
   " "  3 . 2

6 7 8 9 1 0 1 1

O S C

D O

D I

2 32 42 52 62 72 82 93 03 13 23 3

2 2

S e g 9 / K S 9

2 1

S e g 8 / K S 8

2 0

S e g 7 / K S 7

1 9

S e g 6 / K S 6

1 8

S e g 5 / K S 5

1 7

S e g 4 / K S 4

1 6

S e g 3 / K S 3

1 5

S e g 2 / K S 2

1 4

S e g 1 / K S 1

1 3

V D D

1 2

V S S

C L K

C S

K E Y 0

K E Y 1

Pad Assignment

L E D 0

L E D 1

L E D 2

L E D 3

O S C

D O

D I

C L K

C S

K E Y 0

K E Y 1

1

2

3

4

5

6

7

8

9

1 0

1 1

S e g 2 0 / G r i d 9

S e g 2 1 / G r i d 8

S e g 2 2 / G r i d 7

S e g 2 3 / G r i d 6

S e g 2 4 / G r i d 5

G r i d 4

G r i d 3

G r i d 2

G r i d 1

V S S

4 4

1 2

V D D

4 3

4 2

1 3 1 4 1 5 1 6

3 3

3 9

4 0

( 0 , 0 )

1 8

3 8

3 7

2 0

2 1

1 9

4 1

1 7

3 4

3 5

3 6

3 2

3 1

3 0

2 9

2 8

2 7

2 6

2 2

2 5

2 4

2 3

S e g 1 9 / G r i d 1 0

S e g 1 8 / G r i d 1 1

S e g 1 7 / G r i d 1 2

V E E

S e g 1 6 / K S 1 6

S e g 1 5 / K S 1 5

S e g 1 4 / K S 1 4

S e g 1 3 / K S 1 3

S e g 1 2 / K S 1 2

S e g 1 1 / K S 1 1

S e g 1 0 / K S 1 0

V D D

V S S

S e g 9 / K S 9

S e g 8 / K S 8

S e g 7 / K S 7

S e g 6 / K S 6

S e g 5 / K S 5

S e g 4 / K S 4

S e g 3 / K S 3

S e g 2 / K S 2

S e g 1 / K S 1

Chip Size:

* The IC substrate should be connected to VSS in the PCB layout artwork.

Rev. 1.30 2 November 21, 2006

HT16515

Pad Coordinates

Pad No. X Y Pad No. X Y

1

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18 61.35
19 162.75
20 264.15
21 365.55
22 466.95

-962.50

-962.50

-962.50

-962.50

-962.50 -107.20

-962.50 -235.60

-962.50 -366.00

-962.50 -471.00

-962.50 -576.00

-962.50 -681.00

-962.50 -786.00

-689.60 -772.45

-460.45 -595.30

-344.25 -595.30

-242.85 -595.30

-141.45 -595.30

-40.05 -595.30

600.00

495.00 24 834.10

380.20 25 834.10

275.20 26 834.10

-595.30

-595.30

-595.30

-595.30

-595.30

23

27 834.10
28 834.10
29 834.10
30 987.30 0.50
31 987.30 130.50
32 987.30 382.05
33 987.30 734.05
34 610.30 594.40
35 508.90 594.40
36 407.50 594.40
37 306.10 594.40
38 204.70 594.40
39 103.30 594.40
40 1.90 594.40
41
42
43
44

834.10

-99.50

-200.90

-317.10

-624.50

Unit: mm

-754.00

-652.60

-551.20

-449.80

-348.40

-247.00

-145.60

594.40

594.40

594.40

756.80

Pin Description

Pin No. Pin Name I/O Description

1~4 LED3~LED0 O

5 OSC I Connected to an external resistor or an RC oscillator circuit.

6DO O

7DI I

8 CLK I

9CS

10, 11 Key0, Key1 I Key-in data input to these pins are latched at the end of the display cycle.

12, 44 VSS

13, 43 VDD

14~29 Seg1/KS1~Seg16/KS16 O

30 VEE

31~38

39~42 Grid4~Grid1 O

Seg17/Grid12~
Seg24/Grid5

LED driver output ports. This is a CMOS output pin and maximum driving
current up to +20mA.

Data output pin, output serial data at falling edge of shift clock, starting from
the lower bit. This is N-ch open-drain output pin.

Data input pin, input serial data at rising edge of shift clock, starting from the
lower bit.

Clock input pin. Reads serial data at the rising edge, and outputs data at the
falling edge.

Initializes serial interface at the rising or falling edge of the HT16515. Then
it waits to receive a command. Data input after CS

I

current processing is stopped, and the serial interface is initialized. While
CS

is high, CLK is ignored.

Negative power supply, ground

¾

Positive power supply

¾

High voltage output, segment output pins, dual function as key source. This
is PMOS open-drain and pull-low resistor output.

VFD power supply

¾

High voltage output, these pins are selectable for segment or grid output.

O

This is PMOS open-drain and pull-low resistor output.

High voltage output, grids output pin. This is PMOS open-drain and pull-low
resistor output.

has fallen is processed,

Rev. 1.30 3 November 21, 2006

Approximate Internal Connections

HT16515

N M O S O U T

P M O S O U T C M O S O U T

V

V

D D

V

E E

D D

Absolute Maximum Ratings

Supply Voltage...........................VSS-0.3V to VSS+6.0V

Input Voltage..............................V

-0.3V to VDD+0.3V

SS

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil
ity.

D.C. Characteristics

Symbol Parameter

V

V

f

OSC

R

I

DD

I

OL

I

OL1

I

OH1

I

OH21

I

OH22

I

OL3

V

DD

EE

PL

IH

Logic Supply Voltage

VFD Supply Voltage

Oscillation Frequency

Output Pull-low Resistor

Operating Current

Driver Leakage Current

LED Sink Current

LED Source Current

Segment 1~16 Source Current

Segment 17~24, Grid 1~4
Source Current

DO Sink Current

²H² Input Voltage ¾¾

V

DD

3.3V

5V 4.5 5 5.5 V

¾¾

3.3V
R

OSC

5V

3.3V
Driver output 40 65 120

5V

3.3V

No load, VFD display off,
data output =00H

5V

3.3V
V

O=VDD

5V

3.3V
V

OL

5V 20

3.3V
V

OH

5V

3.3V
V

OH=VDD

5V

3.3V
V

OH=VDD

5V

3.3V
V

OL

5V 4

Operating Temperature...........................-25°Cto75°C

Storage Temperature ............................-50°Cto125°C

Ta=25°C, VEE=VDD-35V

Test Conditions

Conditions

¾

=82kW

Min. Typ. Max. Unit

3 3.3 3.6 V

0

¾ V

350 500 650 kHz

¾¾

¾¾

-35V, VFD driver off

¾¾-5

¾¾-10

10

=1V, LED0~LED3

¾¾

¾¾

=0.9VDD, LED0~LED3

¾¾-1.5

¾¾-3

-2V

¾¾-1.5

¾¾-3

-2V

¾¾-7.5

¾¾-15

2

=0.4V

¾¾

¾¾

0.7V

DD

¾

DD

V

-35

kW

3

mA

5

mA

mA

mA

mA

mA

mA

V

DD

V

-

Rev. 1.30 4 November 21, 2006