5895

8-BIT SERIAL-INPUT,

LATCHED DRIVERS

BiMOS II 8-BIT SERIAL INPUT,

LATCHED SOURCE DRIVERS

The UCN5895A, UCN5895EP, and A5895SLW BiMOS II serial-

input, latched source drivers are designed for applications emphasiz-

ing low output saturation voltages and currents to -250 mA per output.

These smart high-side octal, driver ICs merge an 8-bit CMOS shift

register, associated CMOS latches, and CMOS control logic (strobe

and output enable) with medium current emitter-follower (sourcing)

outputs. Typical applications include incandescent or LED displays

(both directly driven and multiplexed), non-impact (i.e., thermal)

printers, relays, and solenoids.

Each device is suitable for high-side applications to -250 mA per

channel. The maximum supply voltage is 50 V and a minimum output

sustaining voltage rating of 35 V for inductive load applications. Under

normal operating conditions, the UCN5895A and UCN5895EP are

capable of providing -120 mA (8 outputs continuous and simultaneous)

at +65

°C with a logic supply of 5 V. Similar devices, with higher output

current ratings, are the UCN5890A and UCN5891A.

BiMOS II devices can operate at greatly improved data-input rates.

With a 5 V supply, they will typically operate at better than 5 MHz.

At 12 V, significantly higher speeds are obtained.

The CMOS inputs provide for minimum loading and are compatible

with standard CMOS, PMOS, and NMOS circuits. TTL or DTL circuits

may require the use of appropriate pull-up resistors to ensure a proper

input-logic high. A CMOS serial data output allows cascading these

devices in multiple drive-line applications required by many dot matrix,

alphanumeric, and bar graph displays.

These devices are rated for continuous operation over the tem-

perature range of -20

°C to +85°C. Because of limitations on package

power dissipation, the simultaneous operation of all output drivers may

require a reduction in duty cycle. The UCN5895A is supplied in a

standard 16-pin dual in-line plastic package with a copper lead frame

for increased allowable package power dissipation. The UCN5895EP

is supplied in a 20-lead plastic leaded chip carrier for minimum area,

surface-mount applications. The A5895SLW is supplied in a 16-lead

wide-body plastic SOIC.

FEATURES

s Low Output-Saturation Voltage

s Source Outputs to 50 V

s Output Current to -250 mA

s To 3.3 MHz Data-lnput Rate

s Low-Power CMOS Logic & Latches

Always order by complete part number, e.g.,

UCN5895A .

UCN5895A

Note the UCN5895A (DIP) and the A5895SLW

(SOIC) are electrically identical and share a common

terminal number assignment.

ABSOLUTE MAXIMUM RATINGS

Logic Supply Voltage Range,

Driver Supply Voltage Range,

Input Voltage Range,

Continuous Output Current,

Allowable Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

Caution: CMOS devices have input-static

protection, but are susceptible to damage when

exposed to extremely high static electrical

charges.

5895

2

3

4

5

6

7

8

SERIAL

DATA OUT

SERIAL

DATA IN

OUTPUT

ENABLE

LOGIC

SUPPLY

STROBE

CLOCK

CLK

ST

OE

1

GROUND

9

10

11

12

13

14

15

16

Dwg. PP-026-2A

SHIFT

REGISTER

LATCHES

LOAD

SUPPLY