Four-channel Enhanced 2.97V To 5.5V UARTs With 16-byte FIFO ST16C554DIQ64-F

General Description
The ST16C554, ST16C554D and ST68C554 are each quad
Universal Asynchronous Receivers and Transmitters
(UARTs) with 16 bytes of transmit and receive FIFOs,
selectable receive FIFO trigger levels, and data rates of up to
1.5Mbps. Each UART has a set of registers that provide the
user with operating status and control, receiver error
indications, and modem serial interface controls. An internal
loopback capability allows onboard diagnostics. The
ST16C554 is available in a 64-pin LQFP package, the
ST16C554D is available in both a 64-pin LQFP and a 68-pin
PLCC package, and the ST68C554 is available in a 68-pin
PLCC package. The 64-pin package only offers the 16 mode
interface, but the 68-pin package offers an additional 68
mode interface which allows easy integration with Motorola
processors. The ST16C554CQ64 (64-pin) offers three-state
interrupt output while the ST16C554DCQ64 provides
continuous interrupt output. The ST16C554 and ST16C554D
combine the package interface modes of the 16C554 and
68C554 on a single integrated chip.

Features
■ Pin-to-pin compatible with the industry standard
ST16C454, ST68C454, ST68C554, TI’s TL16C554A and
Philips’ SC16C554B
■ Intel or Motorola data bus interface select
■ Four independent UART channels
 Register set compatible to 16C550
 Data rates of up to 1.5Mbps at 5V
 Data rates of up to 500kbps at 3.3V
 16 byte transmit FIFO
 16 byte receive FIFO with error tags
 4 selectable RX FIFO trigger levels
 Full modem interface
■ 2.97V to 5.5V supply operation
■ Crystal oscillator or external clock input
Applications
■ Portable appliances
■ Telecommunication network routers
■ Ethernet network routers
■ Cellular data devices
■ Factory automation and process controls

Packaging and transportation instructions

- According to the standard export packaging.

Customers can choose from cartons, wooden cases and wooden pallets according to their own requirements.

Q&A

1. How to obtain the price?

We usually quote within 24 hours after receiving your inquiry (except weekends and holidays). If you are in urgent need of a price, please send us an email or contact us in any other way so that we can provide you with a quotation.

2. What is your delivery time?

This depends on the quantity of the order and the season in which you place the order. Usually, we can ship the goods within 7 to 15 days (for small batches), and for large batches, it takes about 30 days.

3. What are your payment terms?

Factory price, 30% deposit, 70%T/T payment before shipment.

4. What is the mode of transportation?

It can be transported by sea, air or express delivery (EMS, UPS, DHL, TNT, FEDEX, etc.). Please confirm with us before placing an order.

5. How do you help our business establish a long-term and good relationship?

We maintain good quality and competitive prices to ensure that our customers benefit.

2. We respect every customer as our friend. We do business with them sincerely and make friends with them, no matter where they come from.