5818-F

BiMOS II 32-Bit Serial-Input, Latched Source Drivers with Active-DMOS Pull-Downs 5818 Pinning

Features

60 V Source Outputs
High-Speed Source Drivers
To 3.3 MHz Data Input Rate
Low-Output Saturation Voltages
Active DMOS Pull-Downs
Low-Power CMOS Logic and Latches
Reduced Supply Current Requirements
Improved Replacements for SN75518N/FN

Packages

40-Pin DIP
44-Lead PLCC

Description

Designed primarily for use with vacuum-fluorescent displays, the UCx5818AF and UCx5818EPF smart power BiMOS II drivers combine CMOS shift registers, data latches, and control circuitry, with bipolar high-speed sourcing outputs and DMOS active pull-down circuitry. The high-speed shift register and data latches allow direct interfacing with microprocessor LSI-based systems. A CMOS serial data output enables cascade connections in applications requiring additional drive lines. Both devices feature 60 V and -40 mA output ratings, allowing them to be used in many other peripheral power driver applications.

These smart power drivers have been designed with BiMOS II logic for improved data entry rates. With a 5 V supply, they will typically operate above 5 MHz. At 12 V, significantly higher speeds are obtained. Use of these devices with TTL may require the use of appropriate pull-up resistors to ensure an input logic high.

The UCx5818AF is supplied in a 40-pin plastic dual in-line package with 0.600" (15.24 mm) row spacing. A copper lead frame, reduced supply current requirement, and low output saturation voltage permits operation with minimum junction temperature rise. The 'A' package allows all 32 outputs to be operated at -25 mA continuously over the operating temperature range.

For high-density packaging applications, the UCx5818EPF is furnished in a 44-lead plastic chip carrier (quad pack) for surface mounting on solder lands with 0.050" (1.27 mm) centers. The PLCC allows -25 mA continuous operation of all outputs simultaneously at ambient temperatures to 60°C. Similar devices are available as the UCx5810AF/LWF (10 bits), UCN5811A (12 bits), and UCx5812AF/ EPF (20 bits).

Both devices are available for operation between -20°C and +85°C (prefix 'UCN'), and between -40°C and +85°C (prefix 'UCQ').

Functional Block Diagram