3D7428

Features:

• All-silicon, low-power CMOS technology
• TTL/CMOS compatible inputs and outputs
• Vapor phase, IR and wave solderable
• Auto-insertable (DIP pkg.)
• Leading- and trailing-edge accuracy
• Programmable via serial or parallel interface
• Increment range: 0.25 through 20.0ns
• Delay tolerance: 0.5% (See Table 1)
• Supply current: 3mA typical
• Temperature stability: ±1.5% max (-40C to 85C)
• Vdd stability: ±0.5% max (4.75V to 5.25V)


Pinout

PIN DESCRIPTIONS
IN            Signal Input
OUT         Signal Output
MD          Mode Select
AE           Address Enable
P0-P7     Parallel Data Input
SC          Serial Clock
SI           Serial Data Input
SO          Serial Data Output
VDD       +5 Volts
GND       Ground

Specifications

PARAMETER	SYMBOL	MIN	MAX	UNITS	NOTES
DC Supply Voltage	VDD	-0.3	7.0	V
Input Pin Voltage	VIN	-0.3	VDD+0.3	V
Input Pin Current	IIN	-1.0	1.0	mA	25C
Storage Temperature	TSTRG	-55	150	C	10 sec
Lead Temperature	TLEAD		300	C

Description

The 3D7428 device is a versatile 8-bit programmable monolithic delay line. The input (IN) is reproduced at the output (OUT) without inversion, shifted in time as per the user selection. Delay values, programmed either via the serial or parallel interface, can be varied over 255 equal steps according to the formula:
           Ti,nom = Tinh + i * Tinc
where i is the programmed address, Tinc is the delay increment (equal to the device dash number), and Tinh is the inherent (address zero) delay. The device features both rising- and falling-edge accuracy.

The all-CMOS 3D7428 integrated circuit has been designed as a reliable, economic alternative to hybrid TTL programmable delay lines. It is offered in a standard 16-pin auto-insertable DIP and a surface mount 16-pin SOL. An 8-pin SOIC package is available for applications where the parallel interface is not needed.