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SC28L92

Selection guide

Datasheet

SC28L92
(Product Specification)
19-Dec-07, 73 pages, 337 kB

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SC28L92 - 3.3 V/5.0 V Dual Universal Asynchronous Receiver/Transmitter (DUART)

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The SC28L92 is a pin and function replacement for the SCC2692 and SC26C92 operating at 3.3 V or 5 V supply with added features and deeper FIFOs. Its configuration on power-up is that of the SC26C92. Its differences from the SCC2692 and SC26C92 are: 16 character receiver, 16 character transmit FIFOs, watchdog timer for each receiver, mode register 0 is added, extended baud rate and overall faster speeds, programmable receiver and transmitter interrupts. (Neither the SC26C92 nor the SCC2692 is being discontinued.)

Pin programming will allow the device to operate with either the Motorola or Intel bus interface. The bit 3 of the MR0A register allows the device to operate in an 8 byte FIFO mode if strict compliance with the SC26C92 FIFO structure is required.

The NXP Semiconductors SC28L92 Dual Universal Asynchronous Receiver/Transmitter (DUART) is a single-chip CMOS-LSI communications device that provides two full-duplex asynchronous receiver/transmitter channels in a single package. It interfaces directly with microprocessors and may be used in a polled or interrupt driven system with modem and DMA interface.

The operating mode and data format of each channel can be programmed independently. Additionally, each receiver and transmitter can select its operating speed as one of 28 fixed baud rates; a 16x clock derived from a programmable counter/timer, or an external 1x or 16x clock. The baud rate generator and counter/timer can operate directly from a crystal or from external clock inputs. The ability to independently program the operating speed of the receiver and transmitter make the DUART particularly attractive for dual-speed channel applications such as clustered terminal systems.

Each receiver and transmitter is buffered by 8 or 16 character FIFOs to minimize the potential of receiver overrun, transmitter underrun and to reduce interrupt overhead in interrupt driven systems. In addition, a flow control capability is provided via RTS/CTS signaling to disable a remote transmitter when the receiver buffer is full.

Also provided on the SC28L92 are a multipurpose 7-bit input port and a multipurpose 8-bit output port. These can be used as general purpose I/O ports or can be assigned specific functions (such as clock inputs or status/interrupt outputs) under program control.

The SC28L92 is available in three package versions: PLCC44, QFP44, and HVQFN48.

Features

  • Member of IMPACT family: 3.3 V to 5.0 V, -40 Cel to +85 Cel and 68xxx or 80xxx bus interface for all devices
  • Dual full-duplex independent asynchronous receiver/transmitters
  • 16 character FIFOs for each receiver and transmitter
  • Pin programming selects 68xxx or 80xxx bus interface
  • Programmable data format
    • 5 data to 8 data bits plus parity
    • Odd, even, no parity or force parity
    • 1 stop, 1.5 stop or 2 stop bits programmable in 1/16-bit increments
  • 16-bit programmable counter/timer
  • Programmable baud rate for each receiver and transmitter selectable from:
    • 28 fixed rates: 50 kBd to 230.4 kBd
    • Other baud rates to 1 MHz at 16x
    • Programmable user-defined rates derived from a programmable counter/timer
    • External 1x or 16x clock
  • Parity, framing, and overrun error detection
  • False start bit detection
  • Line break detection and generation
  • Programmable channel mode
    • Normal (full-duplex)
    • Automatic echo
    • Local loopback
    • Remote loopback
    • Multi-drop mode (also called wake-up or 9-bit)
  • Multi-function 7-bit input port (includes IACKN)
    • Can serve as clock or control inputs
    • Change of state detection on four inputs
    • Inputs have typically > 100 kOhm pull-up resistors
    • Change of state detectors for modem control
  • Multi-function 8-bit output port
    • Individual bit set/reset capability
    • Outputs can be programmed to be status/interrupt signals
    • FIFO status for DMA interface
  • Versatile interrupt system
    • Single interrupt output with eight maskable interrupting conditions
    • Output port can be configured to provide a total of up to six separate interrupt outputs that may be wire ORed
    • Each FIFO can be programmed for four different interrupt levels
    • Watchdog timer for each receiver
  • Maximum data transfer rates: 1x - 1 Mbit/s, 16x - 1 Mbit/s
  • Automatic wake-up mode for multi-drop applications
  • Start-end break interrupt/status
  • Detects break which originates in the middle of a character
  • On-chip crystal oscillator
  • Power-down mode
  • Receiver time-out mode
  • Single 3.3 V or 5 V power supply
  • Powers up to emulate SC26C92

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
SC28L92A1ASC28L92A1A,5129352 632 93512Volume productionSOT187-2
(PLCC44)
Tube Dry PackStandard Marking
SC28L92A1ASC28L92A1A,5189352 632 93518Volume productionSOT187-2
(PLCC44)
Reel Dry Pack, SMD, 13"Standard Marking
SC28L92A1ASC28L92A1A,5299352 632 93529Volume productionSOT187-2
(PLCC44)
SC28L92A1BSC28L92A1B,5289352 632 94528Volume productionSOT307-2
(QFP44)
Reel Dry Pack, SMD, 13",TurnedStandard Marking
SC28L92A1BSC28L92A1B,5519352 632 94551Volume productionSOT307-2
(QFP44)
Tray Dry Pack, Bakeable, SingleStandard Marking
SC28L92A1BSC28L92A1B,5579352 632 94557Volume productionSOT307-2
(QFP44)
Tray Dry Pack, Bakeable, MultipleStandard Marking
SC28L92A1B/GSC28L92A1B/G,5289352 761 02528Volume productionSOT307-2
(QFP44)
Reel Dry Pack, SMD, 13",TurnedStandard Marking
SC28L92A1B/GSC28L92A1B/G,5579352 761 02557Volume productionSOT307-2
(QFP44)
Tray Dry Pack, Bakeable, MultipleStandard Marking
SC28L92A1B/NSC28L92A1B/N,5579352 784 15557Volume productionSOT307-2
(QFP44)
Tray Dry Pack, Bakeable, MultipleStandard Marking

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
SC28L92A1ASC28L92A1A,512SC28L92A1A
week 10, 2005
SC28L92A1ASC28L92A1A,518SC28L92A1A
week 10, 2005
SC28L92A1ASC28L92A1A,529SC28L92A1A
week 10, 2005
SC28L92A1BSC28L92A1B,528SC28L92A1B
week 13, 2005
SC28L92A1BSC28L92A1B,551SC28L92A1B
week 13, 2005
SC28L92A1BSC28L92A1B,557SC28L92A1B
week 13, 2005
SC28L92A1B/GSC28L92A1B/G,528SC28L92A1B_G
Always Pb-free
SC28L92A1B/GSC28L92A1B/G,557SC28L92A1B_G
Always Pb-free
SC28L92A1B/NSC28L92A1B/N,557SC28L92A1B_N

Quality and reliability disclaimer

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
SC28L92A1A9352 632 93512  SC28L92A1A,512  8.8700NAMOUSER ELECTRONICS1,248 11/20/2009Buy onlineOrder samples
    NANEWARK125 11/20/2009Buy online 
    NAMOUSER ELECTRONICS1,248 11/20/2009Buy online 
    NAFUTURE ELECTRONICS248 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING2,512 11/19/2009Buy online 
SC28L92A1A9352 632 93518  SC28L92A1A,518  8.8700NANEWARK125 11/20/2009Buy onlinenot available
    NAAVNET ELECTRONICS MARKETING1,256 11/19/2009Buy online 
    NAFUTURE ELECTRONICS2,500 11/19/2009Buy online 
SC28L92A1A9352 632 93529  SC28L92A1A,529  8.8700NANEWARK125 11/20/2009Buy onlinenot available
    NAAVNET ELECTRONICS MARKETING1,256 11/19/2009Buy online 
    NADIGI-KEY CORPORATION122 11/20/2009Buy online 
    NAARROW ELECTRONICS93 11/19/2009Buy online 
SC28L92A1B9352 632 94528  SC28L92A1B,528  11.0200NAMOUSER ELECTRONICS905 11/20/2009Buy onlinenot available
    NAARROW ELECTRONICS501 11/19/2009Buy online 
    NAMOUSER ELECTRONICS905 11/20/2009Buy online 
    NAARROW ELECTRONICS1,500 11/19/2009Buy online 
SC28L92A1B9352 632 94551  SC28L92A1B,551  11.0200NAARROW ELECTRONICS501 11/19/2009Buy onlinenot available
    ASIAWPI969611/19/2009Buy online 
SC28L92A1B9352 632 94557  SC28L92A1B,557  11.0200NAARROW ELECTRONICS501 11/19/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION578 11/20/2009Buy online 
    NAFUTURE ELECTRONICS18,923 11/19/2009Buy online 
SC28L92A1B/G9352 761 02528  SC28L92A1B/G,528        not available
SC28L92A1B/G9352 761 02557  SC28L92A1B/G,557        Order samples
SC28L92A1B/N9352 784 15557  SC28L92A1B/N,557        Order samples

Block diagrams/pinning

Parametrics/similar products

Type numberPackageApplicationFUNCTIONOperating
temp.(Cel)
No. of PinsReceiver/Transmitter Type
SC28L92A1ASOT187-2
(PLCC44)
Data CommunicationReceivers/Transmitters-40~8544Dual UARTs
SC28L92A1BSOT307-2
(QFP44)
Data CommunicationReceivers/Transmitters-40~8544Dual UARTs
SC28L92A1B/GSOT307-2
(QFP44)
Data CommunicationReceivers/Transmitters-40~8544Dual UARTs
SC28L92A1B/NSOT307-2
(QFP44)
Data CommunicationReceivers/Transmitters-40~8544Dual UARTs


Similar products
SC28L92 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.