Frequently applied in non-impact printer systems, the UCN5890A,

UCN5890LW, UCN5891A, and UCN5891LW are BiMOS II serial-input,

latched source (high-side) drivers. The octal, high-current smart-power ICs

merge an 8-bit CMOS shift register, associated CMOS latches, and CMOS

control logic (strobe and output enable) with sourcing power Darlington

outputs. Typical applications include multiplexed LED and incandescent

displays, relays, solenoids, and similar peripheral loads to a maximum of

-500 mA per output.

Except for output voltage ratings, these smart high-side driver ICs are

equivalent. The UCN5890A/LW are rated for operation with load supply

voltages of 20 V to 80 V and a minimum output sustaining voltage of 50 V.

The UCN5891A/LW are optimized for operation with supply voltages of 5 V

to 50 V (35 V sustaining).

BiMOS II devices have higher data-input rates than the original BiMOS

circuits. With a 5 V supply, they will operate to at least 3.3 MHz. At 12 V,

higher speeds are possible. The CMOS inputs are compatible with standard

CMOS and NMOS logic levels. TTL circuits may require the use of appropri-

ate 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.

Suffix ‘A’ devices are supplied in a standard dual in-line plastic package

with copper lead frame for enhanced package power dissipation characteris-

tics. Suffix ‘LW’ devices are supplied in a standard wide-body SOIC package

for surface-mount applications. Similar driver, featuring reduced output

saturation voltage, are the UCN5895A and A5895SLW. Complementary,

8-bit serial-input, latched sink drivers are the Series UCN5820A.

FEATURES

I 50 V or 80 V Source Outputs

I Output Current to -500 mA

I Output Transient-Suppression Diodes

I To 3.3 MHz Data-lnput Rate

I Low-Power CMOS Logic and Latches

BIMOS II 8-BIT SERIAL-INPUT,

LATCHED SOURCE DRIVERS

ABSOLUTE MAXIMUM RATINGS

°C

(UCN5890A & UCN5890LW) ......... 80 V

(UCN5891A & UCN5891LW) ......... 50 V

Logic Supply Voltage Range,

(UCN5890A/LW) ................ 20 V to 80 V

(UCN5891A/LW) ............... 5.0 V to 50 V

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.

Always order by complete part number, e.g., UCN5891LW .

5891

Note the suffix ‘A’ devices (DIP) and the suffix

‘LW’ devices (SOIC) are electrically identical and

share a common terminal number assignment.

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