The DS1045 is a programmable silicon delay line with one input and two 4-bit programmable delay outputs. Each 4-bit programmable output offers the user 16 possible delay values to select from, starting with a minimum inherent DS1045 delay of 9ns and a maximum achievable delay in the standard DS1045 family of 84ns. The standard DS1045 product line provides the user with three devices having uniform delay increments of 3, 4 and 5ns, depending on the device. Table 1 presents standard device family and delay capability. Additionally, custom delay increments are available for special order through Dallas Semiconductor. The DS1045 is TTL and CMOS-compatible and capable of driving ten 74LS-type loads. The output produced by the DS1045 is both leading and trailing edge accurate.
The DS1045 provides one input and two independent 4‑bit programmable delay outputs (OUTA and OUTB). Users can select from 16 delay values per output, with minimum inherent delay of 9 ns and maximum up to 84 ns depending on the device version (3 ns, 4 ns or 5 ns increments). The device is supplied in a 16‑pin DIP or SOIC package and is TTL‑compatible, low‑power CMOS.
Electrical specifications include a 5 V supply, input logic thresholds of 2.2 V (high) and –0.5 V (low), short‑circuit output current rating of 50 mA for 1 s, operating temperature range 0 °C to 70 °C, and input capacitance of 10 pF. Programming is performed via parallel pins A0‑A3 and B0‑B3, with optional enable pins EA and EB.
| Minimum delay | 9 ns |
|---|---|
| Delay increments | 3 ns, 4 ns, 5 ns |
| Supply voltage VCC | 5 V (typ 5.0 V, range 4.75‑5.25 V) |
| Input logic high threshold | 2.2 V |
| Input logic low threshold | -0.5 V |
| Short‑circuit output current | 50 mA for 1 s |
| Operating temperature | 0 °C to 70 °C |
| Storage temperature | -55 °C to +125 °C |
| Input capacitance | 10 pF |
It has two independent 4‑bit programmable outputs, labeled OUTA and OUTB.
The device operates from a 5 V supply (typical 5.0 V, with a range of 4.75 V to 5.25 V).