Datenblatt-Suchmaschine für elektronische Bauteile |
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ST16C2450IJ44 Datenblatt(PDF) 1 Page - Exar Corporation |
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ST16C2450IJ44 Datenblatt(HTML) 1 Page - Exar Corporation |
1 / 29 page Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com áç áç áç áç ST16C2450 2.97V TO 5.5V DUART SEPTEMBER 2003 REV. 4.0.0 GENERAL DESCRIPTION The ST16C2450 (2450) is a dual universal asynchro- nous receiver and transmitter (UART). The ST16C2450 is an improved version of the ST16C2450 with lower operating voltage and 5 volt tolerant inputs. The 2450 provides enhanced UART functions, a modem control interface and data rates up to 1.5 Mbps. Onboard status registers provide the user with error indications and operational status. In- dependent programmable baud rate generators are provided to select transmit and receive clock rates up to 1.5 Mbps. An internal loopback capability allows onboard diagnostics. The 2450 is available in a 44- pin PLCC and 48-pin TQFP packages. The 2450 is fabricated in an advanced CMOS process capable of operating from 2.97 volt to 5.5 volt power supply. The devices with a top marking of "A2 YYWW" or newer have 5 volt tolerant inputs. APPLICATIONS • Portable Appliances • Telecommunication Network Routers • Ethernet Network Routers • Cellular Data Devices • Factory Automation and Process Controls FEATURES Added feature in devices with top marking "A2 YYWW" and newer: s 5 Volt Tolerant Inputs • 2.97 to 5.5 Volt Operation • Pin-to-pin compatible to Exar’s ST16C2450, ST16C2550, XR16L2550, XR16L2750 and XR16C2850 • Pin-to-pin compatible to TI’s TL16C752B on the 48- TQFP package • 2 independent UART channels s Up to 1.5 Mbps data rate with a 24 MHz crystal oscillator or external clock frequency s 1 byte Transmit FIFO s 1 byte Receive FIFO with error tags s Status report registers s Modem control signals (CTS#, RTS#, DSR#, DTR#, RI#, CD#) s Programmable character lengths (5, 6, 7, 8) with even, odd, or no parity • Crystal oscillator or external clock input • TTL compatible inputs, outputs • Industrial temperature ranges • 48-TQFP and 44-PLCC packages FIGURE 1. ST16C2450 BLOCK DIAGRAM XTAL1 XTAL2 Crystal Osc/Buffer TXA, RXA, DTRA#, DSRA#, RTSA#, DTSA#, CDA#, RIA#, OP2A# 8-bit Data Bus Interface UART Channel A 16 Byte TX FIFO 16 Byte RX FIFO BRG TX & RX UART Regs 2.25 to 5.5 Volt VCC GND TXB, RXB, DTRB#, DSRB#, RTSB#, CTSB#, CDB#, RIB#, OP2B# UART Channel B (same as Channel A) A2:A0 D7:D0 CSA# CSB# INTA INTB IOW# IOR# Reset |
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