UM3202 datasheet(9/13 Pages) UNIONSEMI

9 / 13 page

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http://www.union-ic.com

Rev.06 Sep.2013

9/13

UM3202

Pullup or Pulldown Resistors on I/O Lines

Each A-port I/O has an internal 10-kΩ pullup resistor to VCCA, and each B-port I/O has an internal

10-kΩ pullup resistor to VCCB. If a smaller value of pullup resistor is required, an external resistor

must be added from the I/O to VCCA or VCCB (in parallel with the internal 10-kΩ resistor).

Test Circuits

A. CL includes probe and jig capacitances.

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by

the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by

the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR≤100MHz,

ZO=50Ω, dv/dt≥1V/ns.

D. The outputs are measured one at a time, with one transition per measurement.

E. TPLZ and TPHZ are the same as tdis.

F. TPZL and TPZH are the same as ten.

G. TPLH and TPHL are the same as tpd.

H. VCCI is the VCC associated with the input port.

I. VCCO is the VCC associated with the output port.

J. All parameters and waveforms are not applicable to all devices.

Figure 2 Load Circuits and Voltage Waveforms

UM3202 Datasheet(PDF) 9 Page - Union Semiconductor, Inc.