LTC1323 Single 5V AppleTalk Transceiver DESCRIPTIO FEATURES n Single Chip Provides Complete The LTC 1323 is a multi-protocol line transceiver designed LocalTalk /AppleTalk Port to operate on AppleTalk or EIA562-compatible single- n Operates From a Single 5V Supply ended networks while operating from a single 5V supply. n ESD Protection to 10kV on Receiver Inputs There are two versions of the LTC1323 available: a 16-pin and Driver Outputs version designed to connect to an AppleTalk network, n Low Power: I = 2.4mA Typ and a 24-pin version which also includes the additional CC n Shutdown Pin Reduces I to 0.5A Typ single-ended drivers and receivers necessary to create CC n Receiver Keep-Alive Function: I = 65A Typ an Apple-compatible serial port. An on-board charge CC n Differential Driver Drives Either Differential pump generates a 5V supply which can be used to AppleTalk or Single-Ended EIA562 Loads power external devices. Additionally, the 24-pin LTC1323 n Drivers Maintain High Impedance in Three-State or features a micropower keep-alive mode during which with Power Off one of the single-ended receivers is kept active to monitor n Thermal Shutdown Protection external wake-up signals. The LTC1323 draws only 2.4mA n Drivers are Short-Circuit Protected quiescent current when active, 65A in receiver keep- alive mode, and 0.5A in shutdown, making it ideal for use in battery-powered systems. APPLICATI S The differential driver can drive either differential AppleTalk n LocalTalk Peripherals loads or conventional single-ended loads. The driver n Notebook/Palmtop Computers outputs three-state when disabled, during shutdown, in n Battery-Powered Systems receiver keep-alive mode, or when the power is off. The driver outputs will maintain high impedance even with output common-mode voltages beyond the power supply rails. Both the driver outputs and receiver inputs are , LTC and LT are registered trademarks of Linear Technology Corporation. AppleTalk and LocalTalk are registered trademarks of Apple Computer, Inc. protected against ESD damage to 10kV. TYPICAL APPLICATI LTC1323 5V 1F 24 1 CHARGE PUMP 0.33F 2 23 5 TO 10 5 TO 10 = 0.33F EMI FILTER CPEN 3 22 1F 100pF 21 TXD 4 + DX TXI 5 20 TXD EMI FILTER + TXDEN 6 19 TXD DX EMI FILTER SHDN 7 18 TXO EMI FILTER RXEN 8 17 RXI 8 7 6 EMI FILTER RX RXO 9 16 RXI 5 4 3 EMI FILTER RXO 10 15 RXD RX EMI FILTER 2 1 + RXDO 11 14 RXD EMI FILTER RX 12 13 LTC1323 TA01 1 + UO UO ULTC1323 ABSOLUTEXAI U RATI GS Supply Voltage (V ) ................................................ 7V Driver Short-Circuit Duration .......................... Indefinite CC Input Voltage Operating Temperature Range .................... 0C to 70C Logic Inputs .............................. 0.3V to V + 0.3V Storage Temperature Range ................ 65C to 150C CC Receiver Inputs ................................................ 15V Lead Temperature (Soldering, 10 sec)................. 300C Driver Output Voltage (Forced) ............................. 15V PACKAGE/ORDER I FOR ATIO TOP VIEW ORDER PART ORDER PART + NUMBER NUMBER C1 1 28 V CC + C2 2 27 C2 TOP VIEW LTC1323CG LTC1323CS CPEN 3 26 C2 + C1 1 16 V CC TXD 4 25 NC + C1 2 15 C2 TXI 5 24 NC TXD 3 14 C2 TXDEN 6 23 V EE TXDEN 4 13 V EE SHDN 7 22 TXD 5 12 SHDN TXD + RXEN 8 21 TXD + 6 11 RXEN TXD RXO 9 20 TXO 7 10 RXDO RXD RXO 10 19 RXI + 8 9 GND RXD RXDO 11 18 RXI S PACKAGE NC 12 17 RXD 16-LEAD PLASTIC SO + NC 13 16 RXD T = 125C, = 85C/W JMAX JA GND 14 15 PGND G PACKAGE 28-LEAD PLASTIC SSOP T = 150C, = 96C/W JMAX JA TOP VIEW ORDER PART + NUMBER 1 C1 24 V CC + 2 C1 23 C2 LTC1323CSW 3 CPEN 22 C2 4 TXD 21 V EE 5 TXI 20 TXD + 6 TXDEN 19 TXD 7 SHDN 18 TXO RXEN 8 17 RXI RXO 9 16 RXI RXO 10 15 RXD + RXDO 11 14 RXD GND 12 13 PGND SW PACKAGE 24-LEAD PLASTIC SO WIDE T = 125C, = 85C/W JMAX JA Consult factory for Industrial and Military grade parts. 2 U WU U W W W