6. Technical Specifications

PHY

88Q2221M

Link Speeds

100M / 1G

MACsec Support

Yes

TC10 Compliant

Yes

Host Interface

MSA Compliant SFP

Host SerDes Modes

SGMII

Operating Voltage

3.3V

Operating Temperature

-40°C to +85°C

Dimensions

3” x 0.53” x 0.8”

Weight

45g (0.1lb)

6.1. PHY Latency

Tx (µs)

Rx (µs)

Link Speed

MACsec Mode

Min

Typ

Max

Min

Typ

Max

1000BASE-T1

Disabled

0.440

0.60963

0.768

4.281

4.43126

4.625

Auth Only

2.654

2.81549

3.051

6.563

6.70195

6.843

100BASE-T1

Disabled

0.981

1.01225

1.048

1.397

1.43234

1.466

Auth Only

22.554

22.6401

22.688

23.279

23.40299

23.533

(Updated Oct 01, 2026)