ST16C654

Quad UART with 64-Byte FIFO and Infrared (IrDA) Encoder/Decoder

Description

The ST16C6541 is a universal asynchronous receiver and transmitter (UART) with a dual foot print interface compatible with the ST16C554 and ST68C554. The 654 is an enhanced UART with 64 byte FIFO’s, automatic hardware/software flow control, and data rates up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status, modem interface control. System interrupts may be tailored to meet user requirements. An internal loop-back capability allows onboard diagnostics.

The 654 is available in 64-pin TQFP, 68-pin PLCC, and 100-pin QFP packages. The 64-pin package offers the 16 interface mode which is compatible with the industry standard ST16C554. The 68 and 100 pin packages offer an additional 68 mode which allows easy integration with Motorola, and other popular microprocessors.

The ST16C654CQ64 (64 pin) offers three state interrupt control while the ST16C654DCQ64 provides constant active interrupt outputs. The 64 pin devices do not offer TXRDY/RXRDY outputs or the default clock select option (CLKSEL). The 100 pin packages offer faster channel status access by providing separate outputs for TXRDY and RXRDY, offer separate Infrared TX outputs and a musical instrument clock input (MIDICLK). The 654 combines the package interface modes of the 16C454/ 554 and 68/C454/554 series on a single integrated chip.

NOTE: 1 Covered by U.S. Patent #5,649,122.

For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

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Features

  • Compatibility with the Industry Standard ST16C454/554, ST68C454/554, TL16C554
  • 1.5 Mbps transmit/receive operation (24MHz)
  • 64 byte transmit FIFO
  • 64 byte receive FIFO with error flags
  • Automatic software/hardware flow control
  • Programmable Xon/Xoff characters
  • Independent transmit and receive control
  • Software selectable Baud Rate Generator pre-scaleable clock rates of 1X, 4X
  • Four selectable Transmit/Receive FIFO interrupt trigger levels
  • Standard modem interface or infrared IrDA encoder/decoder interface
  • Software flow control turned off optionally by any (Xon) RX character
  • Independent MIDI interface on 100 pin packages
  • 100-pin packages offer internal register FIFO monitoring and separate IrDA TX outputs
  • Sleep mode ( 200mA stand-by)
  • Pb-Free, RoHS Compliant Versions Offered

Application

  • Portable Appliances
  • Telecommunication Network Routers
  • Ethernet Network Routers
  • Cellular Data Devices
  • Factory Automation and Process Controls

Design Tools

Simulation Models
Evaluation Hardware and Software

Packaging

Pkg Code Details Quantities Dimensions PDF
LQFP64
  • JEDEC Reference: MO-026
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 50.0ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 1000
  • Quantity per Tube: n/a
  • Quantity per Tray: 160
  • Reel Size (Dia. x Width x Pitch): 330 x 24 x 16
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 10.00
  • Width: 10.00
  • Thickness: 1.40
  • Lead Pitch: 0.50
MQFP100 14x20
  • JEDEC Reference: MS-022
  • MSL Pb-Free: L3 @ 250°C
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 34.94ºC/W
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 500
  • Quantity per Tube: n/a
  • Quantity per Tray: 66
  • Reel Size (Dia. x Width x Pitch): 330 x 44 x 24
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 14.00
  • Width: 20.00
  • Thickness: 3.40
  • Lead Pitch: 0.65
PLCC68
  • JEDEC Reference: MS-018
  • MSL Pb-Free: L3 @ 245ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 29.0ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 250
  • Quantity per Tube: 19
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 44 x 32
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: inch
  • Length: 0.954
  • Width: 0.954
  • Thickness: 0.152
  • Lead Pitch: 1.72

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
ST16C654CJ68-F PLCC68 0 70 Active
ST16C654CJ68TR-F PLCC68 0 70 Active
ST16C654CQ100-F MQFP100 14x20 0 70 Active
ST16C654CQ100TR-F MQFP100 14x20 0 70 OBS Suggested:
ST16C654CQ100-F
ST16C654CQ64 LQFP64 0 70 OBS
ST16C654CQ64-F LQFP64 0 70 Active
ST16C654CQTRSW-F OBS Suggested:
ST16C654CQ64TR-F
ST16C654IJ68-F PLCC68 -40 85 Active
ST16C654IJ68TR-F PLCC68 -40 85 EOL Suggested:
ST16C654IJ68-F
ST16C654IQ100-F MQFP100 14x20 -40 85 Active
ST16C654IQ100TR-F MQFP100 14x20 -40 85 OBS Suggested:
ST16C654IQ100-F
ST16C654IQ64 LQFP64 -40 85 OBS
ST16C654IQ64-F LQFP64 -40 85 Active
ST16C654IQ64TR-F LQFP64 -40 85 OBS Suggested:
ST16C654IQ64-F
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
07/12/2017 Product Discontinuation Notice PDN_17-0626-01-1033.pdf
01/04/2017 Qualification of alternate assembly subcon, ANST. PCN 16-0623-01 ANST-1033.pdf
07/29/2016 Qualification of alternate assembly subcon, Greatek, Taiwan. PCN 15-0936-02 Greatek-1033.pdf
07/26/2016 Product discontinuation notification. Discontinued. PDN 16-0626-01-1033.pdf
11/05/2015 Updated information subsequent to original published PCN 13-0834-03 on 04/02/2014. ASE Malaysia as alternate assembly site Addition of qualified alternate assembly site of 28, 44, 68L PLCC packaged products. PCN 13-0834-03A PLCC 28-44-1033.pdf
04/02/2014 Qualification of ASE Malaysia for assembly of 28, 44, 68L PLCC packaged products. Alternate assembly site. PCN_13-0834-03-1033.pdf
12/05/2013 Addition of an alternate qualified assembly site, ASE Chung-Li (Taiwan). Alternate assembly site. PCN_13-0623-03A-1033.pdf
10/03/2013 Product Discontinuation Notification Discontinued. PDN_13-1003-01-1033.pdf
10/03/2013 Addition of an alternate qualified assembly site, ASE Chung-Li (Taiwan). Material change and alternate assembly site. PCN_13-0623-03-1033.pdf
10/17/2012 Exar has qualified Millennium Microtech/Thailand as an alternate assembly supplier for 28, 44 and 68 lead PLCC packages in addition to the existing supplier, Unisem/Indonesia. Capacity enhancement PCN_12-0824-01-1033.pdf