Document
RD3ST24
Standby Control IC
REJ03D0521-0200 Rev.2.00
Mar 01, 2006
Description
RD3ST24 is including the standby control circuit for a microcomputer in 8 pin packages.
When MSTB input "Low", SWOUT output "Low", STBYOUT output become “High” and cancels standby condition.
And RESOUT output becomes ''High'' after it passed period (t1*) when it is stable the oscillation that was set up with RC bill outside and cancel the reset condition of a microcomputer.
Also when MSTB input "Low", RESOUT output becomes "Low" and makes reset condition.
After the delay time (t2) of prescription passed subsequently, SWOUT output "High" STBYOUT output becomes "Low" and makes a microcomputer standby condition.
*: t1 = K•RC (K is coefficient: Reference of application data)
Features
• Supply voltage range: 2.3 to 5.5 V
• Temperature range: –40 to +85°C
• Output current: ±6mA (@VCC=3.0V), ±12mA (@Vcc=4.5V) • Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
RD3ST24USE
SSOP-8 pin
PVSP0008KA–A
(TTP-8DBV)
Package Abbreviation
US
Taping Abbreviation (Quantity)
E (3,000 pcs/reel)
Outline and Article Indication
• RD3ST24
Index band
Lot No.
SSOP-8
YMW S24
Y : Year code (the last digit of year)
M : Month code W : Week code
Marking
Rev.2.00 Mar 01, 2006 page 1 of 9
RD3ST24
Pin Arrangement
BATT 1 SWOUT 2
MSTB 3 GND 4
8 Vcc 7 RESOUT 6 STBYOUT 5 RxCx
Pin Description
BATT SWOUT MSTB GND RxCx STBYOUT RESOUT VCC
Symbol
Pin Name The battery power supply Output for Power MOS FET control Manual standby Input Ground Terminal for external resistance and capacitance Standby Output Reset Output Power supply
Rev.2.00 Mar 01, 2006 page 2 of 9
RD3ST24
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit Test Conditions
Supply voltage range Input voltage range *1 Output voltage range *1, 2
VCC
–0.5 to 7.0
V
VI
–0.5 to VCC + 0.5
V
VO
–0.5 to VCC + 0.5
V Output: H or L
–0.5 to 7.0
VCC: OFF
Input clamp current
IIK ±20 mA VI < 0
Output clamp current
IOK ±50 mA VO < 0 or VO > VCC
Continuous output current
IO
±25 mA VO = 0 to VCC
Continuous current through VCC or GND
ICC or IGND
±50 mA
Maximum power dissipation at Ta = 25°C (in still air) *3
PT
200 mW
Storage temperature
Tstg
–65 to 150
°C
Notes: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore no two of
which may be realized at the same time.
1. The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are
observed.
2. This value is limited to 6.0 V maximum.
3. The maximum package power dissipation was calculated using a junction temperature of 150°C.
Recommended Operating Conditions
Item Supply voltage range Input voltage range Output voltage range Output current
Symbol VCC, BATT
VI VO IOH
IOL
External resistance External capacitance Operating free-air temperature
RX CX Ta
Min 2.3 0.0 0.0 — — — — 1.0 — –40
Typ — — — — — — — — Unlimited —
Max 5.5 VCC 5.5 –6 –12 6 12 — — 85
Unit V V V mA
kΩ F °C
Conditions
VCC = 3.0 V to 3.6 V VCC = 4.5 V to 5.5 V VCC = 3.0 V to 3.6 V VCC = 4.5 V to 5.5 V
Rev.2.00 Mar 01, 2006 page 3 of 9
RD3ST24
Electrical Characteristic
Ta = –40 to 85°C
Item
Symbol VCC BATT Min Typ Max Unit (V) (V)
Test condition
Input voltage
VIH
2.5±0.2
0.7×VCC
—
—V
3.3±0.3
0.7×VCC
—
—
5.0±0.5
0.7×VCC
—
—
VIL 2.5±0.2 — — 0.3×VCC V
3.3±0.3 — — 0.3×VCC
5.0±0.5 — — 0.3×VCC
Output voltage
VOH
3.0 3.0
2.9
—
— V IOH=–100µA
2.48 —
—
IOH=–6mA
4.5 4.5
4.4
—
—
IOH=–100µA
3.8 —
—
IOH=–12mA
VOL 3.0 3.0 —
— 0.1 V IOL=100µA
— — 0.44
IOL=6mA
4.5 4.5
—
— 0.1
IOL=100µA
— — 0.55
IOL=12mA
Input current Output leakage current
IIN IOFF
5.5 5.5 00
— —
— ±10 µA VIN=0V or VCC, RXCX=GND
— ±10 µA VO=5.5V, RXCX=GND (RESOUT, STBYOUT, SWOUT)
Quiescent supply current
ICC ICC (BATT)
5.5 5.5 0
5.5 5.5 5.5
— — —
— ±10 µA VIN=0V or VCC, RXCX=GND — ±10 uA — ±10 uA
Switching Characteristics
Ta = –40 to 85°C
Item
Symbol VCC (V) *1 BATT (V) Min Typ Max Unit
Test condition
Propagation delay time
t1
3.3 3.3 80 95 110 µs RX=10kΩ, CX=0.01µF 0.8 0.95 1.1 ms RX=10kΩ, CX=0.1µF 80 95 110 ms RX=100kΩ, CX=1.0µF
5.0 5.0 80 95 110 µs RX=10kΩ, CX=0.01µF 0.8 0.95 1.1 ms RX=10kΩ, CX=0.1µF 80 95 110 ms RX=100kΩ, CX=1.0µF
t2 3.3 3.3 125 — 250 ns
5.0 5.0 70 — 160 ns
Note: 1. Ta = 25°C
Rev.2.00 Mar 01, 2006 page 4 of 9
RD3ST24
Timing Diagram
MSTB
RESOUT
STBYOUT
t1
SWOUT
Application Circuit
VCC=3.3V
t2
F
VCC
GND VOH
VOL VOH
VOL VOH
VOL
BATT SWOUT MSTB GND
VCC RESOUT
STBYOUT RXCX
Control IC (RD3ST24)
F
VOUT CDLY VDD VSS VMRN
RESET IC
VCC
22kΩ
RES STBY
22kΩ
Standerd Microcomputer
Notes: 1. CDLY terminal of RESET IC becomes shortest that delay time the setting. 2. VOUT of RESET IC is not connected to a direct microcomputer.
Rev.2.00 Mar 01, 2006 page 5 of 9
RD3ST24
Application Data
10000.0 1000.0 100.0 10.0 1.0 0.1 10 2
10000.0 1000.0 100.0 10.0 1.0 0.1 10 2
Vcc = 5.0 V
Rext
10 3 10 4 10 5 Ti.