NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
Recommended Substitutions:
8-Bit Latched, DMOS Power Driver
A6B273
We recommend the A6B595 or A6801.
Date of status change: October 29, 2007
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available.
Discontinued Product
t
e
e
h
S
a
t
a
D
2b
2
1
.
0
8
1
6
2
8-BIT LATCHED
DMOS POWER DRIVER
The A6B273KA and A6B273KLW combine eight (positive-edge-
triggered D-type) data latches and DMOS outputs for systems requiring
relatively high load power. Driver applications include relays, sole-
noids, and other medium-current or high-voltage peripheral power
loads. The CMOS inputs and latches allow direct interfacing with
microprocessor-based systems. Use with TTL may require appropriate
pull-up resistors to ensure an input logic high.
The DMOS output inverts the DATA input. All of the output
drivers are disabled (the DMOS sink drivers turned OFF) with the
CLEAR input low. The A6B273KA/KLW DMOS open-drain outputs
are capable of sinking up to 500 mA. Similar devices with reduced
rDS(on) are available as the A6273KA/KLW.
The A6B273KA is furnished in a 20-pin dual in-line plastic
package. The A6B273KLW is furnished in a 20-lead wide-body,
small-outline plastic package (SOIC) with gull-wing leads for surface-
mount applications. Copper lead frames, reduced supply current
requirements, and low on-state resistance allow both devices to sink
150 mA from all outputs continuously, to ambient temperatures over
85°C.
FEATURES
■50 V Minimum Output Clamp Voltage
■150 mA Output Current (all outputs simultaneously)
■5Ω Typical rDS(on)
■Low Power Consumption
■Replacements for TPIC6B273N and TPIC6B273DW
6B273
Note that the A6B273KA (DIP) and the A6B273KLW
(SOIC) are electrically identical and share a common
terminal number assignment.
1
2
3
8
9
13
14
15
16
17
19
4
5
6
7
12
18
20
IN
V
DD
GROUND
OUT
8
OUT
7
OUT
6
Dwg. PP-015-2A
OUT
1
OUT
2
OUT
3
OUT
4
OUT
5
10 11
CLEAR LOGIC
SUPPLY
STROBE
8
IN
7
IN
6
IN
5
IN
4
IN
3
IN
2
IN
1
LATCHES
LATCHES
ABSOLUTE MAXIMUM RATINGS
at TA = 25°C
Output Voltage, VO............................... 50 V
Output Drain Current,
Continuous, IO.......................... 150 mA*
Peak, IOM ................................... 500 mA†
Single-Pulse Avalanche Energy,
EAS ................................................. 30 mJ
Logic Supply Voltage, VDD .................. 7.0 V
Input Voltage Range,
VI................................... -0.3 V to +7.0 V
Package Power Dissipation,
PD........................................... See Graph
Operating Temperature Range,
TA................................. -40°C to +125°C
Storage Temperature Range,
TS................................. -55°C to +150°C
* Each output, all outputs on.
† Pulse duration ≤ 100 µs, duty cycle ≤ 2%.
Caution: These CMOS devices have input static
protection (Class 3) but are still susceptible to damage if
exposed to extremely high static electrical charges.
Selection Guide
Part Number Pb-free* Package Packing RθJA
(°C/W)
A6B273KLW-T Yes 20-pin SOICW 37 per tube 70
A6B273KLWTR-T Yes 20-pin SOICW 1000 per reel 70
RθJC
(°C/W)
17
17
*Pb-based variants are being phased out of the product line. Some variants cited in
this footnote are in production but have been determined to be LAST TIME BUY or
NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently
restricted to existing customer applications. The variants should not be purchased for new
design applications because obsolescence in the near future is probable. Samples are no
longer available. Status change for LAST TIME BUY: October 31, 2006. Deadline for
receipt of LAST TIME BUY orders: April 27, 2007. These variants include: A6B273KLW and
A6B273KLWTR. Status change for NOT FOR NEW DESIGN: May 1, 2006. These variants
include: A6B273KA.
6B273
8-BIT LATCHED
DMOS POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
W
Copyright © 2002 Allegro MicroSystems, Inc.
LOGIC SYMBOL
C1
R
1D 4
5
6
7
14
15
16
17
1
2
11
Dw
g
. FP-046-1A
1D
3
1D8
1D9
1D12
1D13
1D
18
1D19
50 75 100 125 150
2.5
0.5
0
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
AMBIENT TEMPERATURE IN °°
°°C
2.0
1.5
1.0
25
Dwg. GS-004B
SUFFIX 'LW', R = 90°C/W
θJA
SUFFIX 'A', R = 55°C/W
θJA
FUNCTION TABLE
Inputs
CLEAR STROBE INXOUTX
LXXH
HHL
HLH
HLXR
L = Low Logic Level
H = High Logic Level
X = Irrelevant
R = Previous State
DMOS POWER DRIVER OUTPUTLOGIC INPUTS
IN
Dwg. EP-010-16
VDD
Dwg. EP-063
OUT
6B273
8-BIT LATCHED
DMOS POWER DRIVER
www.allegromicro.com
FUNCTIONAL BLOCK DIAGRAM
GROUND
Dwg. FP-016-2
CLEAR
(ACTIVE LOW)
V
DD
LOGIC
SUPPLY
OUT
1
D
C1
CLR
OUT
2
D
C1
CLR
OUT
3
D
C1
CLR
OUT
4
D
C1
CLR
OUT
5
D
C1
CLR
OUT
6
D
C1
CLR
OUT
7
D
C1
CLR
OUT
8
D
C1
CLR
1
IN
2
IN
3
IN
4
IN
5
IN
6
IN
7
IN
8
IN
STROBE
6B273
8-BIT LATCHED
DMOS POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Logic Supply Voltage VDD Operating 4.5 5.0 5.5 V
Output Breakdown V(BR)DSX IO = 1 mA 50 — — V
Voltage
Off-State Output IDSX VO = 40 V, VDD = 5.5 V — 0.1 5.0 µA
Current VO = 40 V, VDD = 5.5 V, TA = 125°C — 0.15 8.0 µA
Static Drain-Source rDS(on) IO = 100 mA, VDD = 4.5 V — 4.2 5.7 Ω
On-State Resistance IO = 100 mA, VDD = 4.5 V, TA = 125°C — 6.8 9.5 Ω
IO = 350 mA, VDD = 4.5 V (see note) — 5.5 8.0 Ω
Nominal Output ION VDS(on) = 0.5 V, TA = 85°C—90—mA
Current
Logic Input Current IIH VI = VDD = 5.5 V — — 1.0 µA
IIL VI = 0, VDD = 5.5 V — — -1.0 µA
Prop. Delay Time tPLH IO = 100 mA, CL = 30 pF — 150 — ns
tPHL IO = 100 mA, CL = 30 pF — 90 — ns
Output Rise Time trIO = 100 mA, CL = 30 pF — 200 — ns
Output Fall Time tfIO = 100 mA, CL = 30 pF — 200 — ns
Supply Current IDD(OFF) VDD = 5.5 V, Outputs off — 20 100 µA
IDD(ON) VDD = 5.5 V, Outputs on — 150 300 µA
Typical Data is at VDD = 5 V and is for design information only.
NOTE — Pulse test, duration ≤100 µs, duty cycle ≤2%.
ELECTRICAL CHARACTERISTICS at TA = +25°C, VDD = 5 V, tir = tif ≤ 10 ns (unless otherwise
specified).
RECOMMENDED OPERATING CONDITIONS
over operating temperature range
Logic Supply Voltage Range, VDD ............... 4.5 V to 5.5 V
High-Level Input Voltage, VIH ............................ ≥ 0.85VDD
Low-level input voltage, VIL ................................. ≤0.15VDD
6B273
8-BIT LATCHED
DMOS POWER DRIVER
www.allegromicro.com
TIMING REQUIREMENTS
PHL
t
90%
f
t
50%
su(D)
t
PLH
t
50%
OUTPUTx
Dwg. WP-036-1
10%
r
t
INx
STROBE
h(D)
t
50%
su(D)
t
h(D)
t
Input Active Time Before Strobe
(Data Set-Up Time), tsu(D) .............................................. 20 ns
Input Active Time After Strobe
(Data Hold Time), th(D) ................................................... 20 ns
Input Pulse Width, tw(D)....................................................... 40 ns
Input Logic High, VIH ................................................ ≥ 0.85VCC
Input Logic Low, VIL ................................................. ≤ 0.15VCC
TEST CIRCUITS
10.5 Ω
+15 V
OUT
200 mH
DUT
Dwg. EP-066
INPUT
I
O
V
O
t
av
I
AS
= 500 mA
V
(BR)DSX
V
O(ON)
Single-Pulse Avalanche Energy Test Circuit
and Waveforms
EAS = IAS x V(BR)DSX x tAV/2
6B273
8-BIT LATCHED
DMOS POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
TERMINAL DESCRIPTIONS
Terminal No. Terminal Name Function
1 CLEAR
When (active) LOW, all latches are reset and all outputs go HIGH (turn OFF).
2IN1CMOS data input to a latch. When strobed, the output then inverts the data
input (IN1 = HIGH, OUT1 = LOW).
3IN2CMOS data input to a latch. When strobed, the output then inverts the data
input (IN2 = HIGH, OUT2 = LOW).
4 OUT1Current-sinking, open-drain DMOS output.
5 OUT2Current-sinking, open-drain DMOS output.
6 OUT3Current-sinking, open-drain DMOS output.
7 OUT4Current-sinking, open-drain DMOS output.
8IN3CMOS data input to a latch. When strobed, the output then inverts the data
input (IN3 = HIGH, OUT3 = LOW).
9IN4CMOS data input to a latch. When strobed, the output then inverts the data
input (IN4 = HIGH, OUT4 = LOW).
10 GROUND Reference terminal for all voltage measurements.
11 STROBE A CMOS dynamic input to all latches. Data on each INx terminal is loaded
into its associated latch on a low-to-high STROBE transition.
12 IN5CMOS data input to a latch. When strobed, the output then inverts the data
input (IN5 = HIGH, OUT5 = LOW).
13 IN6CMOS data input to a latch. When strobed, the output then inverts the data
input (IN6 = HIGH, OUT6 = LOW).
14 OUT5Current-sinking, open-drain DMOS output.
15 OUT6Current-sinking, open-drain DMOS output.
16 OUT7Current-sinking, open-drain DMOS output.
17 OUT8Current-sinking, open-drain DMOS output.
18 IN7CMOS data input to a latch. When strobed, the output then inverts the data
input (IN7 = HIGH, OUT7 = LOW).
19 IN8CMOS data input to a latch. When strobed, the output then inverts the data
input (IN8 = HIGH, OUT8 = LOW).
20 LOGIC SUPPLY (VDD) The logic supply voltage (typically 5 V).
6B273
8-BIT LATCHED
DMOS POWER DRIVER
www.allegromicro.com
A6B273KA
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative.
3. Lead thickness is measured at seating plane or below.
4. Supplied in standard sticks/tubes of 18 devices.
0.014
0.008
0.300
BSC
Dwg. MA-001-20 in
0.430
MAX
20
110
0.280
0.240
0.210
MAX
0.070
0.045
0.015
MIN
0.022
0.014
0.100
BSC
0.005
MIN
0.150
0.115
11
1.060
0.980
0.355
0.204
7.62
BSC
Dwg. MA-001-20 mm
10.92
MAX
20
110
7.11
6.10
5.33
MAX
1.77
1.15
0.39
MIN
0.558
0.356
2.54
BSC 0.13
MIN
3.81
2.93
11
26.92
24.89
6B273
8-BIT LATCHED
DMOS POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
A6B273KLW
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
0° TO 8°
1 2 3
0.020
0.013
0.0040 MIN.
0.0125
0.0091
0.050
0.016
Dwg. MA-008-20 in
0.050
BSC
20 11
0.2992
0.2914 0.419
0.394
0.5118
0.4961
0.0926
0.1043
0°
TO
8°
1
20
23
0.51
0.33
0.10
MIN.
Dwg. MA-008-20 mm
1.27
BSC
11 0.32
0.23
1.27
0.40
7.60
7.40 10.65
10.00
13.00
12.60
2.65
2.35
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative.
3. Supplied in standard sticks/tubes of 37 devices or add ‘TR’ to part number for tape and reel.
6B273
8-BIT LATCHED
DMOS POWER DRIVER
www.allegromicro.com
The products described here are manufactured under one or more
U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be
required to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support devices or systems without express written approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi-
bility for its use; nor for any infringement of patents or other rights of
third parties which may result from its use.
6B273
8-BIT LATCHED
DMOS POWER DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
POWER
INTERFACE DRIVERS
Function Output Ratings* Part Number†
SERIAL-INPUT LATCHED DRIVERS
8-Bit (saturated drivers) -120 mA 50 V‡ 5895
8-Bit 350 mA 50 V 5821
8-Bit 350 mA 80 V 5822
8-Bit 350 mA 50 V‡ 5841
8-Bit 350 mA 80 V‡ 5842
8-Bit (constant-current LED driver) 75 mA 17 V 6275
8-Bit (constant-current LED driver) 120 mA 24 V 6277
8-Bit (DMOS drivers) 250 mA 50 V 6595
8-Bit (DMOS drivers) 350 mA 50 V‡ 6A595
8-Bit (DMOS drivers) 100 mA 50 V 6B595
10-Bit (active pull-downs) -25 mA 60 V 5810-F and 6810
12-Bit (active pull-downs) -25 mA 60 V 5811
16-Bit (constant-current LED driver) 75 mA 17 V 6276
20-Bit (active pull-downs) -25 mA 60 V 5812-F and 6812
32-Bit (active pull-downs) -25 mA 60 V 5818-F and 6818
32-Bit 100 mA 30 V 5833
32-Bit (saturated drivers) 100 mA 40 V 5832
PARALLEL-INPUT LATCHED DRIVERS
4-Bit 350 mA 50 V‡ 5800
8-Bit -25 mA 60 V 5815
8-Bit 350 mA 50 V‡ 5801
8-Bit (DMOS drivers) 100 mA 50 V 6B273
8-Bit (DMOS drivers) 250 mA 50 V 6273
SPECIAL-PURPOSE DEVICES
Unipolar Stepper Motor Translator/Driver 1.25 A 50 V‡ 5804
Addressable 8-Bit Decoder/DMOS Driver 250 mA 50 V 6259
Addressable 8-Bit Decoder/DMOS Driver 350 mA 50 V‡ 6A259
Addressable 8-Bit Decoder/DMOS Driver 100 mA 50 V 6B259
Addressable 28-Line Decoder/Driver 450 mA 30 V 6817
* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits.
Negative current is defined as coming out of (sourcing) the output.
† Complete part number includes additional characters to indicate operating temperature range and package style.
‡ Internal transient-suppression diodes included for inductive-load protection.
