T1 Receive Buffer

The DS2176 is a low-power CMOS device specifically designed for synchronizing receive-side loop-timed T-carrier data streams with system-side timing. The device has several flexible operating modes that simplify interfacing incoming data to parallel and serial TDM backplanes. The device extracts, buffers and integrates ABCD signaling; signaling updates are prohibited during alarm or slip conditions. The buffer replaces extensive hardware in existing applications with one "skinny" 24-pin package. Application areas include digital trunks, drop and insert equipment, transcoders, digital cross-connects (DAC), private network equipment, and PABX-to-computer interfaces such as DMI and CPI.

* Synchronizes loop-timed and system-timed T1 data streams

* Two-frame buffer depth; slips occur on frame boundaries

* Output indicates when slip occurs

* Buffer can be recentered externally

* Ideal for 1.544 to 2.048MHz rate conversion

* Interfaces to parallel or serial backplanes

* Extracts and buffers robbed-bit signaling

* Inhibits signaling updates during alarm or slip conditions

* Integration feature "debounces" signaling

* Slip-compensated output indicates when signaling updates occur

* Compatible with DS2180A T1 transceiver

* Surface mount package available, designated DS2176Q

* Industrial temperature range of -40°C to +85°C available, designated DS2176N