NXP Semiconductors SA630D/01,112

Overview

SA630D/01,112 from NXP Semiconductors is a BiCMOS-based Single-Pole Double-Throw (SPDT) RF switch optimized for DC–1 GHz signal routing in 50 Ω systems. It features CMOS/TTL-compatible enable control (ENCH1), 1 dB typical insertion loss at 200 MHz, 60 dB off-channel isolation at 100 MHz, and consumes only 170 µA from a 5 V supply-making it ideal for portable transceiver front-ends and antenna switching.

For engineers reviewing the SA630D/01,112 datasheet, SA630D/01,112 pinout, SA630D/01,112 application, or SA630D/01,112 equivalent, key selection considerations include its bidirectional operation, internal 50 Ω OFF-channel termination, +18 dBm 1 dB compression point at 300 MHz, fast 20 ns switching, and SO8 surface-mount package compatibility with standard PCB layout practices for RF integrity.

Technical Context

The SA630D/01,112 integrates on-chip CMOS/TTL drivers and uses BiCMOS process technology to achieve low distortion (IP3 = +33 dBm) and high linearity while maintaining ultra-low DC power consumption. Its internal 50 Ω termination on the OFF channel eliminates external resistors and simplifies board design for impedance-matched RF paths.

Switching is controlled unidirectionally via ENCH1: logic HIGH enables Channel 1 (INPUT → OUT1), logic LOW routes signal to Channel 2 (INPUT → OUT2). The device supports bidirectional RF signal flow and includes full ESD protection, AC_GND (pin 7) for critical RF bypassing, and operates across −40 °C to +85 °C ambient temperature.

Key Specifications

Pinout & Package

SA630D/01,112 is housed in an 8-pin SO (SO8, SOT96-1) surface-mount package with 3.9 mm body width and standard lead pitch. Pin 1 is VDD; pins 2 and 6 are GND; pin 3 is INPUT; pin 4 is ENCH1 (TTL/CMOS enable); pins 5 and 8 are outputs (OUT2 and OUT1); pin 7 is AC_GND for RF bypass capacitor placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SPDT RF switch applications.

Compared with QM11036 and SKY13350-378LF, SA630D/01,112 uniquely balances ultra-low power (170 µA), integrated 50 Ω OFF termination, and proven 1 GHz performance in a cost-effective SO8 package-making it optimal for legacy and portable 2G/3G transceivers where power, size, and simplicity are prioritized over extended bandwidth or extreme linearity.

Availability

SA630D/01,112 is available at Aetrix Electronics and suitable for digital transceiver front-ends, antenna switching, and FSK transmitter designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for SA630D/01,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The SA630D/01,112 belongs to NXP's legacy RF switch product line designed specifically for cost-sensitive, low-power wireless infrastructure and portable communication equipment operating below 1 GHz.

FAQ

What is the maximum RF input power the SA630D/01,112 can handle without damage?

The SA630D/01,112 has an absolute maximum input power rating of +20 dBm per Table 4 in the datasheet. Operation beyond this level risks permanent degradation. For linear operation, the 1 dB compression point is +18 dBm at 300 MHz-so sustained signals above this level will exhibit gain compression. Always verify actual system-level power levels at the SA630D/01,112 input using a calibrated RF power meter before deployment.

Does the SA630D/01,112 require external termination resistors on the OFF channel?

No. The SA630D/01,112 internally terminates the OFF channel to 50 Ω, eliminating the need for external resistors. This is confirmed in Section 2 ("Features and benefits") and Section 14 ("Application information"), which state "Unused input is terminated internally in 50 Ω" and describe the internal 50 Ω resistor in series with the AC_GND pin. External termination would degrade matching and increase insertion loss.

Can the SA630D/01,112 operate from a 3.3 V supply?

Yes. The recommended operating supply voltage range is 3.0 V to 5.5 V per Table 5. At 3.3 V, the device remains fully functional: ENCH1 logic thresholds scale accordingly (VIL ≤ 0.8 V, VIH ≥ 2.0 V), and static current drops to ~100 µA. However, RF performance metrics such as P1dB and IP3 decrease slightly-e.g., PL(1dB) drops to +16 dBm at 300 MHz-so verify linearity requirements at 3.3 V in your specific application.

How is the AC_GND (pin 7) used in the SA630D/01,112 layout?

AC_GND (pin 7) connects to the internal 50 Ω OFF-channel termination resistor and must be decoupled with a 0.01 µF capacitor placed as close as possible to the pin. As shown in Figure 19 and described in Section 14, the trace from AC_GND should route straight down from the package edge, not sideways, to minimize inductance. This placement is critical for achieving specified isolation and return loss-especially above 500 MHz.

Is the SA630D/01,112 pin-compatible with earlier SA630 variants like the SA630N?

No. The SA630D/01,112 uses an SO8 (SOT96-1) package, while the discontinued SA630N used an 8-pin DIP (SOT97-1) package with different pinout and thermal characteristics. Table 12 confirms SA630N was removed from the datasheet in Rev. 3. There is no pin-to-pin compatibility-PCB redesign is required when migrating from SA630N to SA630D/01,112 due to differing footprint, lead pitch, and grounding scheme (AC_GND vs. dedicated GND pins).