15 kV ESD Protected, 2.7 V to 3.6 V Serial
Port Transceivers with Green Idle™
Data Sheet
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E1
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Green Idle power-saving mode
Single 2.7 V to 3.6 V power supply
Operates with 3 V logic
0.1 µF to 1 µF charge pump capacitors
Low EMI
Low power shutdown: 20 nA
Full RS-232 compliance
460 kb/s data rate
One receiver active in shutdown
(ADM3307E/ADM3311E/ADM3312E/ADM3315E)
Two receivers active in shutdown (ADM3310E)
ESD >15 kV IEC 1000-4-2 on RS-232 I/Os
ESD >15 kV IEC 1000-4-2 on CMOS and RS-232 I/Os
(ADM3307E)
Qualified for automotive applications
C1
0.1µF
VCC
0.1µF
CERAMIC
C4
0.1µF
+
10µF
TANTALUM
VOLTAGE C2+
TRIPLER/
VCC INVERTER C3+
+3V TO ±9V
C1+
C2–
V+
ENABLE
INPUT
EN
V–
SD
GND
T1IN
T1OUT
T1
T2IN
CMOS
INPUTS1
T3IN
T3
T4
R1
R1OUT
R3
R3OUT
V–
EN
C1–
SD
T1
T1IN
T2IN
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 1. ADM3307E Functional Block Diagram
T3
R2
R2OUT
R3
R3OUT
R5OUT
VCC
10µF
TANTALUM
R4
C2
0.1µF
R5
V–
C2–
ENABLE
INPUT
EN
C1–
C1+
SHUTDOWN
INPUT
SD
T1
T1IN
CMOS
INPUTS1
EIA/TIA-232
OUTPUTS
T2IN
T3IN
R1IN
CMOS
OUTPUTS
EIA/TIA-232
INPUTS2
T3
R3OUT
C5
0.1µF
SHUTDOWN
INPUT
T1OUT
EIA/TIA-232
OUTPUTS
T3OUT
R1
R2
R2OUT
R4IN
C3
0.1µF
T2OUT
T2
R1OUT
R2IN
R3IN
VOLTAGE C3+
TRIPLER/
C2+ INVERTER GND
+3V TO ±9V
C3–
VCC
V+
+
C5
0.1µF
R3
R1IN
R2IN
EIA/TIA-232
INPUTS2
R3IN
ADM3312E/
ADM3315E
R5IN
ADM3310E/
ADM3311E
Figure 2. ADM3310E/ADM3311E Functional Block Diagram
02915-002
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
2INTERNAL 5kΩ (22kΩ FOR ADM3315E) PULL-DOWN RESISTOR ON
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
2INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
1
0.1µF
CERAMIC
T3OUT
R1
R4OUT
C4
0.1µF
C3
0.1µF
T2OUT
R1OUT
CMOS
OUTPUTS
02915-001
ADM3307E
T1OUT
T2
T3IN
R3IN
EACH RS-232 INPUT.
02915-003
VOLTAGE C3+
TRIPLER/
C2+ INVERTER GND
+3V TO ±9V
C3–
VCC
C1+
CMOS
INPUTS1
EIA/TIA-232
INPUTS2
C1
C2–
ENABLE
INPUT
R1IN
0.1µF
V+
+
T5OUT
R2IN
R2
C1
10µF
TANTALUM
T4OUT
T5
R2OUT
EIA/TIA-232
OUTPUTS
T3OUT
T5IN
0.1µF
C2
0.1µF
T2OUT
T2
T4IN
Mobile phone handsets/data cables
Laptop and notebook computers
Printers
Peripherals
Modems
PDAs/Hand-Held Devices/Palmtop Computers
0.1µF
CERAMIC
C5
0.1µF
SHUTDOWN
INPUT
APPLICATIONS
VCC
C3
0.1µF
C3–
C1–
CMOS
OUTPUTS
C4
0.1µF
C2
0.1µF
Figure 3. ADM3312E/ADM3315E Functional Block Diagram
Protected by U.S. Patent No. 5,606,491.
Rev. I
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