HHM1591D1

Product Overview

Designed for 350 MHz to 470 MHz, HHM1591D1 provides a defined balanced RF interface in a compact package. The 1:2 transformation connects the 50 Ω unbalanced / 100 Ω balanced ports and replaces a larger discrete matching network. Confirmed selection limits include insertion loss of 1.5 dB, return loss of 8.5 dB, amplitude balance of 0 dB ±1 dB, phase balance of 180° ±10°.

The operating range is intended for DVB-H, GSM and LTE Bands 31, 72 and 73. Related HHM parts use different 50 Ω, 100 Ω, 150 Ω or 200 Ω balanced terminations, so the exact code matters. The recorded lifecycle state is NRND; the exact suffix should remain in the BOM until an approved alternative is qualified.

Key Features

• Manufacturer: TDK
• Part Number: HHM1591D1
• Product Category: RF Balun / RF Transformer
• Device Type: multilayer chip RF balun transformer
• Frequency Range: 350 MHz to 470 MHz
• System / Port Impedance: 50 Ω unbalanced / 100 Ω balanced
• Impedance Ratio: 1:2
• Insertion Loss: 1.5 dB
• Return Loss: 8.5 dB
• Amplitude Balance / Unbalance: 0 dB ±1 dB
• Phase Balance / Difference: 180° ±10°
• Package / Case: 2.0 × 1.25 × 0.95 mm, 6-terminal HHM15
• Mounting Type: Surface mount
• Operating Temperature: -40°C to +85°C
• Lifecycle Status: NRND
• Target Application: DVB-H, GSM and LTE Bands 31, 72 and 73

Applications

• DVB-H, GSM and LTE Bands 31, 72 and 73
• Differential RFIC, mixer and amplifier interfaces
• Compact wireless, cellular, broadcast or telemetry modules

Quality & Sourcing

Antrex Electronics can support sourcing of HHM1591D1 for production, repair and shortage requirements. Incoming verification can include manufacturer marking, dimensional checks, frequency and impedance review, date-code inspection and third-party testing when requested. The exact balanced impedance, package size and lifecycle suffix should remain visible in any alternative-component evaluation.