5962-0620705Q3A Datasheet, PDF (3/9 Pages) Intersil Corporation – ±15kV ESD Protected, +5.0V 1Microamp, 250kbps, RS-232 Transmitters/Receivers

5962-0620705Q3A, 5962-0620706Q3A, 5962-0620707Q2A, 5962-0620708Q2A
Pin Descriptions
PIN
FUNCTION
V_CC
System power supply input (4.5V to 5.5V).
V+
Internally generated positive transmitter supply.
V-
Internally generated negative transmitter supply.
GND
Ground connection.
C1+
External capacitor (voltage doubler) is connected to this lead.
C1-
External capacitor (voltage doubler) is connected to this lead.
C2+
External capacitor (voltage inverter) is connected to this lead.
C2-
External capacitor (voltage inverter) is connected to this lead.
T_IN
T_OUT
R_IN
R_OUT
R_OUTB
INVALID
TTL/CMOS compatible transmitter Inputs. (Note 1)
±15kV ESD Protected, RS-232 level (nominally ±5.5V) transmitter outputs.
±15kV ESD Protected, RS-232 compatible receiver inputs.
TTL/CMOS level receiver outputs.
TTL/CMOS level, noninverting, always enabled receiver outputs.
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
EN
Active low receiver enable control.
FORCEOFF Active low control to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON
(See Tables 1 & 2, Note 1).
FORCEON
Active high input to override automatic power-down circuitry thereby keeping transmitters active. (FORCEOFF must be high,
Note 1).
NOTE:
1. The ICL3238E input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains
that logic level until V_CC is removed. Unused transmitter inputs may be left unconnected by the user.
TABLE 1. POWER-DOWN LOGIC TRUTH TABLE
RCVR OR
XMTR
EDGE
WITHIN 30
SEC?
FORCEOFF FORCEON TRANSMITTER
INPUT
INPUT
OUTPUTS
RECEIVER
OUTPUTS
R_OUTB
OUTPUT
RS-232
LEVEL
PRESENT
AT
RECEIVER
INPUT?
INVALID
OUTPUT
MODE OF OPERATION
ICL3238E
No
H
H
Active
Active
Active
No
L
Normal Operation (Enhanced
Auto Power-down Disabled)
No
H
H
Active
Active
Active
Yes
H
Yes
H
L
Active
Active
Active
No
L
Normal Operation (Enhanced
Auto Power-down Enabled)
Yes
H
L
Active
Active
Active
Yes
H
No
H
L
High-Z
Active
Active
No
L
Power-down Due to Enhanced
Auto Power-down Logic
No
H
L
High-Z
Active
Active
Yes
H
X
L
X
High-Z
High-Z
Active
No
L
Manual Power-down
X
L
X
High-Z
High-Z
Active
Yes
H
3
FN6298.0
May 31, 2006