Latch-based serial port output buffer

Details Latch-based serial port output buffer Latch-based serial port output buffer

2004-09-16

2008-11-11

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S108000, C327S199000

Reexamination Certificate

active

07449924

ABSTRACT:
An integrated circuit (22) having a serial interface (25) with improved access times is disclosed. The serial interface (25) includes a serial output port arranged as a shift register of flip-flop stages (321through32n) and a last output latch stage (320). The last output latch stage (320) includes an integral output buffer (33), and as such is constructed differently from the other output flip-flops (321through32n), which include master and slave latches. No external output buffer is then required; this last output latch stage (320) directly drives the output terminal and the external serial data line (SDATA).

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