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Nonvolatile SRAMs 



Benchmarq's nonvolatile static random-access memories (NVSRAMs) 
integrate — in a single-DIP package — extremely low standby power 
SRAM, nonvolatile control circuitry, and a long-life lithium cell. The 
NVSRAMs combine secure nonvolatility (more than 10 years in the 
absence of power) with standard SRAM pin-outs and fast unlimited 
read/write operation. 



Nonvolatile SRAM Selection Guide 



Part 
No.* 


Density 


Config- 
uration 


Tech- 
nology 


Access 
Time (ns) 


Pins/ 
Package 


Available 


bq401 (J 


64 Kb 




1y V 3I\/\1V1 


70. 85, 
1 50. 200 


28 / DIP 




bq4()1 1 


256 Kb 


32 Kb x 8 


NVSRAM 


70, 100, 
150. 20(1 


28 / DIP 


Now 


bq4013 


1 Mb 


128 Kb x 8 


NVSRAM 


70,85, 120 


32 / DIP 


Now 


bq40l4 


2 Mb 


256 Kb x 8 


NVSRAM 


85. 120 


32 /DIP 


Now 


bq4024 


128 Kbx 16 


NVSRAM 


85, 120 


40 / DIP 


Now 


bq40l5 


4Mb 


512 Kbx 8 


NVSRAM 


70. 85. 120 


32 / DIP 


Now 


bq4025 


256 Kb x 16 


NVSRAM 


85. 120 


41) / DIP 


Now 


bq4U5 


512 Kbx 8 


NVPSRAM 


ISO 


40 / DIP 


Now 


bq4016 


8Mb 


1024Kb x 8 


NVSRAM 


70 


36 / DIP 


Now 


bq4()17 


16Mb 


2048 Kb x 8 


NVSRAM 


70 


36 /DIP 


Now 



Notes: Vcc ■ -5%, +10**; T" suffix versions for Vbc = ±10*. 

Most devices are available in industrial temperature. 



Nonvolatile Controllers 

The nonvolatile controllers provide power monitoring, write protec- 
tion, and supply switching to convert standard SRAM and a backup 
battery into a reliable, predictable nonvolatile memory. The nonvola- 
tile controller modules are complete battery-backup solutions includ- 
ing an encapsulated 130mAh lithium cell that is isolated until power 
is applied. 



Nonvolatile Controller Selection Guide 



Part 
No. 


SRAM 
Banks 


Battery 
Monitor 
Outputs 


Reset 
Output 


IOUT 


Pins/ 
Package 


Available 


bq2201 


l 


No 


No 


160mA 


8/NDIP. NSOIC 


Now 


bq2202 




No 


Yes 


160 mA 


16/NDIP. NSOIC 


Now 


bq2203A 




Yes 


Yes 


160 mA 


16 /ND1P. NSOIC 


Now 


bq2204A 


4 


No 


No 


160mA 


16/NDIP, NSOIC 


Now 


hq22!2 




Yes 


Yes 


80 mA 


16 /ND1P. NSOIC 


Now 


bq2502 




No 


Yes 


160mA 


12/DIPModule 


Now 



Note: bq2201, bq2202, and bq2204Aare available in industrial temperature. 



Benchmarq Microelectronics, Inc., founded in 1989, has a 
worldwide presence in the power-sensitive and portable elec- 
tronic systems marketplace. With sales offices and repre- 
sentatives in more than 25 countries, Benchmarq has earned its 
reputation for providing integrated IC and module solutions that 
address real-world problems in managing battery-operated, low- 
power, and power-sensitive equipment. Benchmarq's solutions 
are adopted by leading-edge corporations producing personal 
computers, cellular phones, telecommunications equipment, and 
portable electronic systems. 

Benchmarq is the recognized leader in battery management inte- 
grated circuits, with a family of ICs that provide fast charge 
control and available capacity monitoring for nickel cadmium, 
nickel metal-hydride, lead acid, lithium-ion, and rechargeable alka- 
line batteries. Benchmarq is a reliable and competitive supplier 
of nonvolatile solutions, including supervisory controller and 
real-time clock ICs as well as controller, static RAM, pseudo 
static RAM, and RTC battery-integrated modules. 

Benchmarq's products take full advantage of advanced analog 
and digital VLSI technologies and state-of-the-art battery and 
packaging expertise. Benchmarq is committed to providing high- 
value solutions for today's power-sensitive and portable applica- 
tions and to developing creative products for the growing chal- 
lenges of tomorrow — supported by. the best customer service and 
the highest overall quality. 




BENCHMARQ 

Microelectronics, Inc. 
17919 Waterview Parkway 
Dallas, Texas 75252 U.S.A 
Fax: (214)437-9198 
Tel: (214)437-9195 or 
(800)966-0011 ; 
E-mail: bencKmarq@benchmarq.com 
WWW: http://www.benchmarq.conr 



Integrated solutions 
for portable and 
power-sensitive 
electronic systems 




Februarv 199fi 



■^ULtVI J IIIUI IU«fVIHVIIfc 



Benchmarq's battery-management family of ICs provide "gas gauge" 
capacity monitoring, fast charge control, and sophisticated battery 
conditioning for nickel cadmium, nickel metal-hydride, lead acid, 
lithium ion, and rechargeable alkaline battery-operated systems. De- 
velopment systems provide an application development environment 
for short design-in cycles. 

Gas Gauge ICs 

The bq20xx family of Gas Gauge ICs integrate all of the necessary 
functions for a smart battery into a single IC. Benchmarq's Gas 
Gauge ICs measure the available charge, calculate self-discharge, and 
optionally provide available charge information via a serial port or 
direct LED display. The total bq20xx circuit typically requires less 
than 1/2 square inch of board space, small enough to fit in the crevice 
between two "A" type cells. The Gas Gauge ICs integrate capacity 
monitoring and charge control, provide SMBus-compatibility, include 
solutions for the power tool industry (applications with very high dis- 
charge currents), and support nickel cadmium, nickel metal-hydride, 
lead acid, lithium ion, and primary and rechargeable alkaline chemis- 
tries. Benchmarq module products provide customer-specific total 
smart battery and charge control solutions on customized PCBs. 



Gas Gauge IC Selection Guide 


Part 
No 


Description 


Capacity 
Information 


Fast 
Charge 
Control 


Pins/ 
Package 


Avail- 
able 


bq20IO 


Gas Gauge IC 


6 LEDs. 
serial port 




16/0.300" NDIP. 
0.150" NSOIC 


Now 


bq20 1 1 


Gas Gauge IC. 
high discharge rate 


5 LEDs, 
serial port 




16/0.300" NDIP. 
0.150" NSOIC 


Now 


bq2011J 


Gas Gauge IC. 
high discharge rate 


5 LEDs. 
serial port 




16/0.300" NDIP. 
0.150" NSOIC 


Now 


bq2012 


Gas Gauge IC. 
charge control 


6 LEDs. 
serial port 


Gas gauge, 
max. temp. 


16/0.300" NDIP. 
0.150" NSOIC 


Now 


bq20l4 


Gas Gauge IC. 
external charge 
control 


5 LEDs. 
serial port 


Ext. control 
using A V. 
AT/At 


16/0.300" NDIP, 
0.150" NSOIC 


Now 


bq2050 


Li-Ion Power 
Gauge™ IC 


5 LEDs. 




16 / 0.300" NDIP. 
0.150" NSOIC 


Now 


EV2010/1 1/ 
12/14/14* 


Gas Gauge Evaluation Systems for 
hq20 1 0/bq20 1 1 /bq20 1 2/bq20 1 4/bq2014+bq2004 


Now 


EV2050 


Li-Ion Power Gauge™ Evaluation System for bq2050 


Now 


EV2050x 


Li-Ion Evaluation System for hq2O5O/bq2O53/bq2004(El 


Now 


bq21 10/12/14 


bq20IO/bq2012/bq2()l4 
Gas Gauge Modules 


Now 


bq21 10L./1 1 L/ 
12L/14L 


bq20l 0/bq20 1 1 /bq2()l 2/bq20 1 4 
Gas Gauge Modules Willi LEDs 


Now 


bq2140L 


hq2O40 SMBus Gas Gauge Module With LEDs 


Now 


bq2!50 


bq2050 Lithium-Ion Power Gauge™ Module 


Now 


bq2!64 


Gas Gauge Module With East Charge Control 


Now 


bq2!65 


Li-Ion Gas Gauge Module With Pack Supervision 


Now 



The Fast Charge IC family provides fast charge termination, switch- 
mode current regulation, battery charge qualification, and condition- 
ing for nickel cadmium, nickel metal hydride, lead acid, lithium ion, 
and rechargeable alkaline batteries. These ICs are easily integrated 
into systems or can be used in stand-alone chargers. 

Benchmarq's Fast Charge ICs are used to gate a current source or serve 
as the modulator for a switching-mode constant-current regulator. Us- 
ing AT/At termination allows in-system variable-rate charging, where 
the excess supply current charges batteries during system operation. 

Prior to fast charge, the ICs check the battery for temperature and 
voltage faults. Direct LED outputs display battery and charge status. 
Fast charge termination methods include delta temperature/delta 
time (AT/At), negative delta voltage (-AV), peak voltage detection 
(PVD), minimum current, maximum temperature, maximum time, 
and maximum voltage. Discharge-before-charge, top-off charge, and 
maintenance charge options are provided. 



Fast Charge IC Selection Guide 



Part 
No. 


Charge 
Control 
Output 


Battery 
Technology 


Termination 
Method 


Pins / 
Package 


Avail- 
able 


bq2002 


Single 


Nil'd. 
NiMH 


-AV. PVD. 
m1l1\ itmp unci tunc 


8 / 0.300" DIP. 
0.150" SOIC 


Now 


bq2002T 


Single 


NiCd. 
NiMH 


AT/At. 
max. temp, and lime 


8 / 0.300" DIP. 
0.150" SOIC 


Now 


bq20O3 


Single 


NiCd. 
NiMH. 
Lead Acid 


-AV. AT/At. 
max. temp., voltage, 
and time 


16 / 0.300" DIP, 
0.300" SOIC 


Now 


bq2(KI4 


Single 


NiCd, 
NiMH 
Li-Ion 


-AV, PVD. AT/At, 
max. temp., voltage, 
and time 


16/0.300" DIP. 
0.150" SOIC 


Now 


bq2004E 


Single 


NiCd. 
NiMH 
Li-Ion 


-AV. PVD. AT/Al. 
max. temp., voltage, 
and time 


16/0.300" DIP, 
0.150" SOIC 


Now 


hq2005 


Dual 


Nil'd. 
NiMH 


-AV. AT/Al. max. temp., 
voltage, and time 


20/0.31X1" DIP. 
0.300" SOIC 


Now 


hi|20<)7 


Single 




-AV, PVD, max. temp., 
voltage, and time 


24/0.300" DIP. 
0.300" SOIC 


Now 


bq203l 


Single 


Lead Acid 


vlax. voltage, min. current, 
max. temp., and time 


16/0300" DIP. 
0.150" SOIC 


Now 


bq2053 


2^f cells 


Li-Ion 


Max./min. voltage, 
overcurrent 


8/0.300" DIP. 
0.150" SOIC 


Now 


bt|2054 


Single 


Li- Ion 


Max. voltage, min. current, 
max. temp., and time 


16/0.300" DIP. 
0.150" SOIC 


IQ96 


bq2902 


2 cells 


Rechargeable 

Alkaline 


Maximum voltage 


8/0.300" DIP. 
0.150" SOIC 


IQ96 


bq2903 


3 or 4 cells 


Rechargeable 
Alkaline 


Maximum voltage 


14/0.300" DIP. 
0.150" SOIC 


1Q96 


hq2l53 


Li-Ion Pack Supervisor Module With bq2053 


Now 


bq2193 


Rechargeable Alkaline Charger Module With bq2"03 


lQufi 


DV2002L 


Linear Development System for bq2002 


Now 


DV2002TL 


Linear Development System for bq2O02T 


Now 


in 2(in.?i 'S 


Linear/Switching Development Systems for bq2(X)3 


Now 


DV2004L/S 


Linear/Switching Development Systems for bq20O4 


Now 


DV2004ES 




Switching Deve 


opment Systems for bq2004E 


Now 


DV2005L/S 


Linear/Switching Development Systems for bq2005 


Now 


DV2007S 


Switching Development System for bq2007 


Now 


DV2031S 


Switching Development System for hq203 1 


Now 


EV2903 


bq2903 Evaluation System 


Now 



Benchmarq is a registered trademark and Power Gauge is a trademark of 
BENCHMARQ Microelectronics, Inc. 



Benchmarq's family of real-time clocks (RTCs) provide highly inte- 
grated clock/calendar solutions for microcomputer-based designs. 
The RTCs feature a time-of-day clock, a 100-year calendar, and RAM 
with battery-backup operation. 

The RTCs are available as an IC or as a module. The module inte- 
grates the IC, crystal, and battery to save board space and provide 10 
years of data retention and clock operation in the absence of power. 
The low-power IC requires only a backup battery and crystal for 
operation. NVSRAM controller versions allow users to make inex- 
pensive SRAM nonvolatile for data and configuration storage in com- 
puters, portable equipment, office machines, and other applications. 

The PC AT-compatible (address/data multiplexed) RTCs are available 
with 3V or 5V operation and have either 114 or 242 bytes of nonvola- 
tile storage RAM. Other features include three maskable interrupts 
and a programmable square-wave output. 

Benchmarq's high-density RTC modules have standard SRAM pin- 
outs and interfaces. The modules have 32Kbytes or 128Kbytes of 
nonvolatile memory and provide a self-contained battery backed-up 
RTC/SRAM solution. The bq4832Y and bq4842Y feature a built-in 
CPU supervisor with a microprocessor reset and a watchdog timer. 
The bq4845 IC and the bq4847 module have no onboard memory but 
integrate an NVSRAM controller with the RTC and CPU supervisor 
to allow for easy nonvolatile memory expansion. 



Real-Time Clock Selection Guide 



Part 
No. 


Onboard 
RAM 

(bytes) 


Operating 
Voltage 


Bus 
Interface 


rni i 
Super- 
visor 


Pins/ 
Package 


Avail- 
able 


bq3285 


114 


5V 


Muxed 


No 


24 / DIP. SOU 
28 / PLCC 


Now 


hq32S5E 


242 


5V 


Muxed 


No 


24 /DIP. SOIC. 
SSOP. 28 / PLCC 


Now 


bq.3285L 


242 


3V 


Muxed 


No 


24 / DIP, 
SOIC. SSOP 


Now 


bq3287/ 
bq3287A 


1 14 


5V 


Muxed 


No 


24 / DIP Module 


Now 


bq3287E/ 
bq3287EA 


242 


5V 


Muxed 


No 


24 / DIP Module 


Now 


bq4285 


1 14 + external 

RAM control 


5V 


Muxed 


No 


24 / DIP. SOIC 
28 / PLCC 


Now 


bq4285E 


1 14 + external 
RAM control 


5V 


Muxed 


No 


24 / DIP, SOIC. 
SSOP. 28 / PLCC 


Now 


bq4285L 


1 14 + external 
RAM control 


3V 


Muxed 


No 


24 / DIP. 
SOIC. SSOP 


Now 


bq4287 


114 + external 
RAM control 


5V 


Muxed 


No 


24 / DIP Module 


Now 


bq4287E 


1 14 + external 
RAM control 


5V 


Muxed 


No 


24 / DIP Module 


Now 


bq4830Y 


32K 


5V 


SRAM 


No 


28 / DIP Module 


Now 


bq4832Y 


12K 


5V 


SRAM 


Yes 


32 / DIP Module 


Now 


bq4842Y 


I28K 


5V 


SRAM 


Yes 


32 / DIP Module 


Now 


bq4845/Y 


+ external 
RAM control 


5V 


SRAM 


Yes 


28 / DIP. SOIC 


Now 


bq4847/Y 


+ external 
RAM control 


5V 


SRAM 


Yes 


28 / DIP Module 


Now 



Note: bq3285E, bq4285E. and bq4845Y are available in industrial temperature.