Allegro A6817SEP Datasheet

6817

ADDRESSABLE
28-LINE
DECODER/DRIVER

B

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

GND

B0

OUTPUT ENABLE

OUT

CHIP ENABLE

6

4

5

7

B1

8

B2

9

B3

10

B4

11

B5

12

B6

13

B7

B8

B9

IC

14

15

16

17

OUTPUT DRIVER BANK B

19

20

18

IC

IC

B10

OUT

GND

3

21

B11

OUT

D

IN (MSB)

LOGIC SUPPLY

2

1

DD

V

4-TO-14 LINE DECODER

23

22

B13

B12

OUT

OUT

IN

44

24

OUT

B

C

IN

43

25

A13

A12

OUT

A

IN (LSB)

GND

424140

27

26

A11

A10

OUT

OUT

A

OUTPUT ENABLE

39

OUT

A0

38

OUT

A1

37

OUT

A2

36

OUT

A3

OUT

35

A4

34

OUT

A5

33

OUT

32

OUT

OUT

31

30

OUT

GND

29

Dwg. PP-050

A6

A7

A8

A9

OUTPUT DRIVER BANK A

28

NC

Data Sheet

26186.22

6817

ADDRESSABLE

28-LINE DECODER/DRIVER

Intended for use in ink-jet printer applications, the A6817SEP
addressable 28-line decoder/driver combines low-power CMOS inputs
and logic with 28 high-current, high-voltage bipolar outputs. A 4-to-14
line decoder determines the selected output driver (n) in each
14-driver bank. Two independent output-enable inputs (active low)
then provide the final decoding to activate 1- or 2-of-28 outputs
(OUTAn and/or OUTBn). Special internal circuitry is programmed at the
time of manufacture to adjust the output pulse timing and thereby the
energy the device delivers to the ink-jet print head. The DABiC-IV
A6817SEP directly replaces the original BiMOS-II A5817SEP in most
applications.

The CMOS inputs cause minimal loading and are compatible with
standard CMOS, PMOS, and NMOS logic. Use with TTL or DTL
circuits may require appropriate pull-up resistors to ensure an input
logic high. The internal CMOS logic operates from a 5 V supply.
A CHIP ENABLE function is provided to lock out the drivers during
system power up. The 28 bipolar power outputs are open-collector
30 V Darlington drivers capable of sinking 500 mA at ambient
temperatures up to 85°C.

The A6817SEP is furnished in a 44-lead plastic chip carrier
(quad pack) for minimum-area, surface-mount applications.

ABSOLUTE MAXIMUM RATINGS

at T

= 25°C

A

Output Voltage, VCE............................. 30 V

Logic Supply Voltage, V
Input Voltage Range,

V

....................... -0.3 V to VDD + 0.3 V

IN

Output Current, I

........................... 600 mA

C

Package Power Dissipation, P
Operating Temperature Range,

T

................................. -20°C to +85°C

A

Storage Temperature Range,

T

.............................. -55°C to +150°C

S

*Derate at rate of 22 mW/°C above TA = 25°C.

Caution: These CMOS devices have input static
protection (Class 2) but are still susceptible to
damage when exposed to extremely high static
electrical charges.

.................. 7.0 V

DD

..... 2.70 W*

D

FEATURES

■ Controlled Characteristics for Ink-Jet Printers

■ Addressable Data Entry

■ 30 V Minimum V

■ CMOS, PMOS, NMOS Compatible Inputs

■ Low-Power CMOS Logic

Always order by complete part number: A6817SEP .

(BR)CEX

6817

ADDRESSABLE
28-LINE
DECODER/DRIVER

A

FUNCTIONAL BLOCK DIAGRAM

B

OUTPUT ENABLE

DELAY

TURN-ON

A0

A1

OUT

OUT

LOGIC SUPPLY

OUT

CHIP ENABLE

A2

A11

OUT

B

A

IN (LSB)

IN

4-TO-14 LINE DECODER

A12

OUT

A13

OUT

OUT

IN

B0

C

D

IN (MSB)

B1

OUT

B2

OUT

B11

OUT

OUTPUT ENABLE

DELAY

TURN-ON

B12

B13

OUT

OUT

Dwg. FP-032

TYPICAL INPUT CIRCUIT TYPICAL OUTPUT DRIVER

V

DD

OUT

N

IN

Dwg. EP-021-7

Dwg. EP-010-1

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

W
Copyright © 1997, Allegro MicroSystems, Inc.

6817

ADDRESSABLE
28-LINE
DECODER/DRIVER

ELECTRICAL CHARACTERISTICS at T

= +25°C, V

A

= 5.0 V.

DD

Limits
Characteristic Symbol Test Conditions Min Typ Max Units
Output Drivers

V

Output Leakage Current I
Output Saturation Voltage V

Output Breakdown Voltage V

CEX

CE(SAT)

(BR)CEX

Unclamped Inductive — V
Load Current I

Turn-On Time t
Fall Time t
Turn-Off Time t
Rise Time t

PHL

f

PLH

r

= 30 V — <1.0 100 µA

CE

I

= 450 mA 0.80 1.10 1.40 V

OUT

= 400 mA 0.75 1.05 1.35 V

I

OUT

RL = 56 Ω 30 — — V

= 30 V, L = 3 µH, RL = 56 Ω, See Note —

CC

= 500 mA, Test Fig.

L

VCC = 21 V, RL = 39 Ω 25 100 425 ns
VCC = 21 V, RL = 39 Ω —20—ns
VCC = 21 V, RL = 39 Ω 50 125 350 ns
VCC = 21 V, RL = 39 Ω —50—ns

Control Logic

Logic Input Voltage V

Logic Input Current I

Input Resistance R
Supply Current I

IN(1)

V

IN(0)

IN(1)

I

IN(0)

IN

DD(ON)

I

DD(OFF)

VIN = 5.0 V — <1.0 100 µA
VIN = 0 V — <-1.0 -100 µA

Two Outputs ON — 6.0 10.0 mA
All Drivers OFF, All Inputs = 0 V, — — 600 µA

OE

Note: Device will turn off and meet all specifications after test.

= OEB = V

A

DD

3.5 — — V
— — 0.8 V

50 — — kΩ