ICL3207ECAZ-T View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

ICL3207ECAZ-T

+/- 15kV ESD Protected, +3V to +5.5V, Low Power, 250kbps, RS-232 Transmitters/Receivers

Intersil 

ICL3207E, ICL3217E

Operation down to 2.7V

ICL32X7E transmitter outputs meet RS-562 levels (±3.7V)

with VCC as low as 2.7V. RS-562 levels typically ensure inter

operability with RS-232 devices.

High Data Rates

The ICL32XX maintain the RS-232 ±5V minimum transmitter

output voltages even at high data rates. Figure 7 details a

transmitter loopback test circuit, and Figure 8 illustrates the

loopback test result at 120kbps. For this test, all transmitters

were simultaneously driving RS-232 loads in parallel with

1000pF, at 120kbps. Figure 9 shows the loopback results for

a single transmitter driving 1000pF and an RS-232 load at

250kbps. The static transmitters were also loaded with an

RS-232 receiver.

5V/DIV.

T1IN

T1OUT

R1OUT

VCC = +3.3V

C1 - C4 = 0.1mF

2µs/DIV.

FIGURE 9. LOOPBACK TEST AT 250kbps

VCC

0.1µF

+

+

C1+

VCC

V+

C1

C1-

ICL32X7E

+

C2+

V-

C2

C2-

TIN

TOUT

ROUT

RIN

5k

+

C3

+C4

1000pF

FIGURE 7. TRANSMITTER LOOPBACK TEST CIRCUIT

5V/DIV.

T1IN

T1OUT

R1OUT

VCC = +3.3V

C1 - C4 = 0.1µF

5µs/DIV.

FIGURE 8. LOOPBACK TEST AT 120kbps

Interconnection with 3V and 5V Logic

The ICL32X7E directly interface with 5V CMOS and TTL

logic families. Nevertheless, with the ICL32X7E at 3.3V, and

the logic supply at 5V, AC, HC, and CD4000 outputs can

drive ICL32X7E inputs, but ICL32X7E outputs do not reach

the minimum VIH for these logic families. See Table 4 for

more information.

TABLE 4. LOGIC FAMILY COMPATIBILITY WITH VARIOUS

SUPPLY VOLTAGES

SYSTEM

POWER-SUPPLY

VOLTAGE

(V)

VCC

SUPPLY

VOLTAGE

(V)

COMPATIBILITY

3.3

3.3 Compatible with all CMOS

families.

5

5

Compatible with all TTL and

CMOS logic families.

5

3.3 Compatible with ACT and HCT

CMOS, and with TTL. ICL32X7E

outputs are incompatible with AC,

HC, and CD4000 CMOS inputs.

±15kV ESD Protection

All pins on ICL32XX devices include ESD protection

structures, but the ICL32X7E incorporate advanced

structures which allow the RS-232 pins (transmitter outputs

and receiver inputs) to survive ESD events up to ±15kV. The

RS-232 pins are particularly vulnerable to ESD damage

because they typically connect to an exposed port on the

exterior of the finished product. Simply touching the port

pins, or connecting a cable, can cause an ESD event that

might destroy unprotected ICs. These new ESD structures

protect the device whether or not it is powered up, protect

without allowing any latchup mechanism to activate, and

don’t interfere with RS-232 signals as large as ±25V.

8

Share Link: