Renesas Technology Releases RNA51xxxFLP Series CMOS Reset ICs for
Microcomputer Voltage Detection, Achieving Industry's Highest-Level Reset
Detection Voltage Precision of 1% and Lowest-Level Current Dissipation of 0.7 A
Lineup of 74 high-precision, low-current-dissipation models for use in mobile
products
Tokyo, December 27, 2004
Renesas Technology Corp. today announced the RNA51xxxFLP Series of
CMOS reset ICs, achieving high precision and low current dissipation through the use of a CMOS process,
as reset ICs that detect the power supply voltage of a microcomputer and execute a reset if an abnormal
voltage is detected. A lineup of 74 models is available covering a reset voltage range from 1.4 V to 5.0 V,
and phased sample shipments will begin from February 2005 in Japan.
The main features of the RNA51xxxFLP Series are summarized below.
(1) 1% (max.) reset detection voltage precision
The industry's highest-level reset detection voltage precision of 1% (max.) is achieved through the
use of voltage trimming*
1
. This high precision -- three times the 3% (max.) figure of current
Renesas Technology models -- enables RNA51xxxFLP Series devices to be used in a wide variety of
products including low-voltage drive systems and battery-operated systems with stringent voltage
management requirements.
(2) Low 0.7 A (typ.) current dissipation
The previous bipolar process has been replaced with a CMOS process to achieve lower power
consumption for use in mobile products, resulting in the industry's lowest current dissipation level of
0.7 A (typ.).
(3) Product lineup offering wide range of reset detection voltages from 1.4 V to 5.0 V
RNA51xxxFLP Series products can handle a total of 37 reset detection voltages from 1.4 V to 5.0 V, in
0.1 V increments. A choice of CMOS output or open-drain output for each voltage level gives a total
lineup of 74 models, enabling users to choose the right model for any application system.
-more-
< Product Background >
With the continuing popularity of small battery-powered products such as notebook PCs and digital
cameras, there is a demand for electronic parts that offer lower operating voltages and current dissipation in
order to extend battery life. Key components such as microprocessors and memory chips have evolved
from the 2.5 V to the 1.8 V power supply voltage class, and reductions in current dissipation are also being
pursued to the limit through techniques such as the use of power management circuits.
While Renesas Technology has been mass-producing bipolar process reset ICs, the need for lower current
dissipation in mobile products has led to the development of the new RNA51xxxFLP Series of CMOS reset
ICs offering lower current dissipation through the use of a CMOS process, together with lower reset
voltages and higher precision.
< Additional Product Details >
RNA51xxxFLP Series CMOS reset ICs employ a 0.8 m CMOS process and include an on-chip delay
circuit providing a reset release timing delay function. This makes it possible to generate a reset signal
with an external input signal for manual reset input, which has been strongly requested by users. Also,
reset signal release timing can be varied by means of an external capacitor, enabling the user to set any
desired power-on reset timing for use when the system is powered on.
The package used is a 5-pin SOT23-5 (Renesas package code: MPAK-5), featuring a small body size
(excluding pins) of 1.6 mm 2.9 mm together with lead-free specifications.
The product lineup includes models handling a total of 37 reset detection voltages from 1.4 V to 5.0 V in
0.1 V increments, as shown in the following table, offering 1% (max.) reset detection voltage precision,
5% (typ.) detection voltage hysteresis*
2
, and 0.7 A (typ.) current dissipation over a wide voltage range.
-more-
RNA51xxxFLP Series Products
Detection Voltage
Output Format
[V]
Open-Drain Output
CMOS Output
1.4
RNA51A14FLP
RNA51B14FLP
1.5
RNA51A15FLP
RNA51B15FLP
1.6
RNA51A16FLP
RNA51B16FLP
1.7
RNA51A17FLP
RNA51B17FLP
1.8
RNA51A18FLP
RNA51B18FLP
1.9
RNA51A19FLP
RNA51B19FLP
2.0
RNA51A20FLP
RNA51B20FLP
2.1
RNA51A21FLP
RNA51B21FLP
2.2
RNA51A22FLP
RNA51B22FLP
2.3
RNA51A23FLP
RNA51B23FLP
2.4
RNA51A24FLP
RNA51B24FLP
2.5
RNA51A25FLP
RNA51B25FLP
2.6
RNA51A26FLP
RNA51B26FLP
2.7
RNA51A27FLP
RNA51B27FLP
2.8
RNA51A28FLP
RNA51B28FLP
2.9
RNA51A29FLP
RNA51B29FLP
3.0
RNA51A30FLP
RNA51B30FLP
3.1
RNA51A31FLP
RNA51B31FLP
3.2
RNA51A32FLP
RNA51B32FLP
3.3
RNA51A33FLP
RNA51B33FLP
3.4
RNA51A34FLP
RNA51B34FLP
3.5
RNA51A35FLP
RNA51B35FLP
3.6
RNA51A36FLP
RNA51B36FLP
3.7
RNA51A37FLP
RNA51B37FLP
3.8
RNA51A38FLP
RNA51B38FLP
3.9
RNA51A39FLP
RNA51B39FLP
4.0
RNA51A40FLP
RNA51B40FLP
4.1
RNA51A41FLP
RNA51B41FLP
4.2
RNA51A42FLP
RNA51B42FLP
4.3
RNA51A43FLP
RNA51B43FLP
4.4
RNA51A44FLP
RNA51B44FLP
4.5
RNA51A45FLP
RNA51B45FLP
4.6
RNA51A46FLP
RNA51B46FLP
4.7
RNA51A47FLP
RNA51B47FLP
4.8
RNA51A48FLP
RNA51B48FLP
4.9
RNA51A49FLP
RNA51B49FLP
5.0
RNA51A50FLP
RNA51B50FLP
-more-
Notes: 1.
Voltage trimming: Performing fine adjustment on a chip-by-chip basis in the wafer state in
order to absorb reset voltage fabrication variations
2.
Detection voltage hysteresis: The difference between the reset detection voltage and reset
release voltage. Providing this difference prevents the occurrence of chattering in a reset
output signal in the vicinity of the reset detection voltage due to system power supply noise.
* Product names, company names, or brands mentioned are the property of their respective owners.
< Typical Applications >
Power supply monitoring circuits for notebook PCs, digital still cameras, digital video cameras, PDAs,
wireless communication devices such as mobile phones and similar battery-powered products,
microprocessor systems , and so on.
< Prices in Japan > *For Reference
Product Name
Detection Voltage
Output Format
Sample Price [ Tax Included ] (Yen)
RNA51A27FLP
2.7 V
Open-drain output
20 [ 21 ]
RNA51B27FLP
2.7 V
CMOS output
20 [ 21 ]
< Specifications >
RNA51xxxFLP Series Specifications
Item
RNA51AxxFLP Series
RNA51BxxFLP Series
Detection voltage
1.4 V to 5.0 V (0.1 V increments)
Detection voltage precision
1 % (max.)
Detection voltage temperature coefficient
100 ppm/
C (typ.)
Detection voltage hysteresis
5 % (typ.)
Current dissipation
0.7
A (typ.)
Output format
Open-drain output
CMOS output
Operating temperature (Topr)
-40
C to +85
C
Process
0.8 m CMOS process
On-chip functions
Reset release timing delay function: Freely settable with
external capacitor
Manual reset function: Externally controllable
Package
SOT23-5 (Renesas package code: MPAK-5)
Body size: 1.6 mm 2.9 mm 1.1 mm (max.)
Pb-free
Information contained in this news release is current as of the date of the press announcement, but may be
subject to change without prior notice.
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