FEATURES
• Halogen-free According to IEC 61249-2-21
• Direct cross to industry standard
SN74LVC1G3157, NC7SB3157,
NLASB3175, Pl5A3157, and STG3157
• SC-70 6-lead package
• 1.65 V to 5.5 V VCC operation
• 5 Ω connection between ports
• Minimal propagation delay
• Break-before-make switching
• Zero bounce in flow-through mode

DESCRIPTION
The DG3157 is a high-speed single-pole double-throw, low
power, TTL-Compatible bus switch. Using sub-micro CMOS
technology, the DG3157 achieves low on-resistance and
negligible propagation delay.
The DG3157 can handle both analog and digital signals and
permits signals with amplitudes of up to VCC to be
transmitted in either direction.
When the Select pin is low, B0 is connected to the output A
pin. When the Select pin is high, B1 is connected to the
output A pin. The path that is open will have a highimpedance
state with respect to the output. Make-beforebreak
is guaranteed. An eptiaxial layer prevents latch-up.