ALLEGRO A6833 User Manual

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A6833

DABiC-5 32-Bit Serial Input Latched Sink Drivers

Designed to reduce logic supply current, chip size, and system cost, the
A6833 integrated circuits offer high-speed operation for thermal print­ers. These devices can also be used to drive multiplexed LED displays
or incandescent lamps within their 125 mA peak output current rating.
The combination of bipolar and MOS technologies gives the A6833

A6833SEP

44-pin PLCC

2

1

345

6

20

19

18

23

22

21

444342

25

24

40

41

39

38

37

36

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32

31

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smart power ICs an interface flexibility beyond the reach of standard
buffers and power driver circuits.

These 32-bit drivers have bipolar open-collector npn Darlington out­puts, a CMOS data latch for each of the drivers, a 32-bit CMOS shift
register, and CMOS control circuitry. The high-speed CMOS shift
registers and latches allow operation with most microprocessor-based
systems. Use of these drivers with TTL may require input pull-up resis­tors to ensure an input logic high. CMOS serial data outputs permit
cascading for applications requiring additional drive lines.

The A6833 is supplied in a 44-lead plastic chip carrier (quad pack),
intended for surface mounting on solder lands with 0.050 in. (1.27 mm)
centers. These devices are lead (Pb) free, with 100% matte tin plated
leadframes.

26185.116B

Data Sheet

AB SO LUTE MAX I MUM RAT INGS

Output Voltage, V
Logic Supply Voltage, V
Input Voltage Range, V
Continuous Output Current (each output), I
Package Power Dissipation, P

A6833SA................................................ 3.5 W*

A6833SEP.............................................. 2.5 W*

Operating Temperature Range
Ambient Temperature, T

Storage Temperature, TS..........–55°C to +150°C

*Derate linearly to 0 W at +150ºC.
Caution: CMOS devices have input-static protection,

but are susceptible to damage when exposed to
extremely high static-electrical charges.

.........................................30 V

OUT

...................................7 V

DD

..............–0.3 V to VDD +0.3 V

IN

OUT

D

............–20°C to +85°C

A

...125 mA

FEATURES

 3.3 V to 5 V logic supply range
 To 10 MHz data input rate
 30 V minimum output breakdown
 Darlington current-sink outputs
 Low-power CMOS logic and latches

 Schmitt trigger inputs for improved noise immunity

APPLICATIONS

 Thermal printheads
 Multiplexed LED displays
 Incandescent lamps

Use the following complete part numbers when ordering:

Part Number Pins Package

A6833SEP-T 44 PLCC

A6833

OUT

DABiC-5 32-Bit Serial-Input Latched Sink Drivers

Functional Block Diagram

V

CLOCK

DD

26185.116B

Data Sheet

SERIAL
DATA IN

32-BIT S H IF T R E G IS TE R

STROBE

LATCHE S

OUTPUT
ENABLE

LOGIC
GROUND

BIPOLAR

SUB

OUT

OUT

2

OUT

3

1

OUT

OUT OUT

30

32

31

POWER
GROUND

Typical Input Circuit Typical Output Driver

V

DD

SERIALDATA

OUT

MOS

IN

SUB

www.allegromicro.com

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

2

A6833

DABiC-5 32-Bit Serial-Input Latched Sink Drivers

26185.116B

Data Sheet

ELECTRICAL CHARACTERISTICS1 Unless otherwise noted: T

Characteristic Symbol Test Conditions

Output Leakage Current I

Collector–Emitter Saturation
Voltage

Input Voltage

Input Current

Serial Data Output Voltage

Maximum Clock Frequency

Logic Supply Current

Output Enable-to-Output Delay

Strobe-to-Output Delay

2

V

CE(SAT)

V

V

I

I

V

OUT(1)IOUT

V

OUT(0)IOUT

I

I

t

dis(BQ)VCC

t

en(BQ)VCC

t

p(STH-QL)VCC

t

p(STH-QH)VCC

Output Fall Time t

Output Rise Time t

Clock-to-Serial Data Out Delay t

p(CH-SQX)IOUT

DD(1)

DD(0)

V

CEX

IN(1)

IN(0)

IN(1)

IN(0)

= 30 V – – 10 – – 10 μA

OUT

I

= 50 mA – – 0.7 – – 0.7 V

OUT

I

= 100 mA – – 1.0 – – 1.0 V

OUT

VIN = V

DD

VIN = 0 V – < –0.01 –1.0 – < –0.01 –1.0 μA

= –200 μA 2.8 3.05 – 4.5 4.75 – V

= 200 μA – 0.15 0.3 – 0.15 0.3 V

f

c

One output on, I

= 100 mA – – 2.0 – – 2.0 mA

OUT

All outputs off – – 100 – – 100 μA

= 50 V, R1 = 500 Ω, C1 ≤ 30 pF – – 1.0 – – 1.0 μs

= 50 V, R1 = 500 Ω, C1 ≤ 30 pF – – 1.0 – – 1.0 μs

= 50 V, R1 = 500 Ω, C1 ≤ 30 pF – – 1.0 – – 1.0 μs

= 50 V, R1 = 500 Ω, C1 ≤ 30 pF – – 1.0 – – 1.0 μs

VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF – – 500 – – 500 ns

f

VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF – – 500 – – 500 ns

r

= ±200 μA – 50 – – 50 – ns

= 25°C, logic supply operating voltage V

A

V

= 3.3 V Vdd = 5 V

dd

Min. Typ. Max. Min. Typ. Max.

2.2 – – 3.3 – – V

– – 1.1 – – 1.7 V

– < 0.01 1.0 – < 0.01 1.0 μA

10 – – 10 – – MHz

= 3.0 V to 5.5 V

dd

Units

1

Positive (negative) current is defined as conventional current going into (coming out of) the specified device pin.

2

Operation at a clock frequency greater than the specified minimum value is possible but not warranteed.

Truth Table

Serial Shift Register Contents Serial Latch Contents Output Output Contents
Data Clock Data Strobe Enable
Input Input I

1I2I3

HHR
LLR
XR

1R2R3

XXX...X X X L R1R2R3... R
P1P2P3... P

1R2

1R2

... I

... R
... R
... R

N-1IN

N-2RN-1

N-2RN-1

N-1RN

N-1PN

Output Input I1I2I3... I

R

N-1

R

N-1

R

N

P

HP1P2P3... P

N

N-1IN

N-1 RN

N-1 PN

Input I1I2I3... I

HP1P2P3... P

X X X ... X X L H H H ... H H

L = Low Logic Level
H = High Logic Level
X = Irrelevant

P = Present State

R = Previous State

www.allegromicro.com

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

N-1

N-1

I

P

N

N

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