Analog Devices Inc./Maxim Integrated MAX9949FCCB

The MAX9949 family integrates two independent per-pin PMUs. Force-voltage, force-current, voltage-measurement and current-measurement modes support semiconductor test channels. Programmable current ranges, analog measurement outputs, comparators, clamps and a three-wire serial control port reduce external ATE circuitry.

• Two PMU channels in one package for per-pin or per-site ATE.
• Five selectable current ranges from ±2 µA to ±25 mA.
• Separate FORCE and Kelvin SENSE connections.
• Programmable voltage clamps and window-comparator thresholds.
• Serially loaded channel registers support coordinated updates.

Supported modes include force voltage/measure current, force current/measure voltage, force voltage/measure voltage, force current/measure current and force nothing/measure voltage. Each channel provides an MSR measurement output and high/low threshold comparator outputs. The serial port is SPI/QSPI/MICROWIRE compatible. External buffer circuitry can extend the current range beyond the on-chip ±25 mA range.

The manufacturer identifies MAX9949 as 64 TQFP-EPR, 10 mm × 10 mm body with 0.5 mm lead pitch and an 8 mm × 8 mm exposed pad on the top. The exposed pad is internally connected to VEE. LCDChip's registered generic name is 64-TQFP Exposed Pad, with expected image 64-TQFP-Exposed-Pad.jpg. A generic bottom-exposed-pad footprint is not equivalent to this top-pad EPR variant.

Layout checks

• Verify the top-side EPR pad and pin-one orientation against the manufacturer drawing.
• Connect or leave the exposed pad only as allowed by the manufacturer; never tie it to another potential.
• Check cooling method and 10 mm × 10 mm, 0.5 mm-pitch land pattern.

The registered JPG is missing; package illustration and mechanical mapping require review before publication.

Manufacturer Rev. 3 pin descriptions assign MAX9949 pin 41 to FORCEA and pin 42 to SENSEA, while pin 8 is FORCEB and pin 7 is SENSEB. The serial interface uses CS pin 64, LOAD pin 63, SCLK pin 62, DIN pin 61 and DOUT pin 56. VL is pin 55; analog VCC and VEE each occupy four pins. The exposed pad is internally tied to VEE.

Use the MAX9949 column, not the adjacent MAX9950 column, in the manufacturer's numeric pin table.

Operating values and test conditions depend on the selected supply and current range. The non-plus legacy order code must be checked against lot-specific documentation.

No database-verified alternate is linked. The MAX9949D version adds an internal 10 kΩ force-sense resistor, while MAX9950 moves the exposed pad to the bottom; neither should be treated as a drop-in replacement. Compare pinout, resistor network, top/bottom thermal interface, control timing, package finish and supply range before substitution.

Maxim Integrated, now part of Analog Devices, publishes the MAX9949/MAX9950 Rev. 3 data sheet. Analog Devices marks the MAX9949 family obsolete. Its current published selector lists MAX9949FCCB+; the exact non-plus MAX9949FCCB catalog identity and finish need legacy-order verification.

• Memory testers.
• Structural testers and system-on-chip testers.
• VLSI testers and legacy PMU-channel repairs.

Confirm complete marking, legacy non-plus order code, top exposed pad, package finish, manufacturing lot and traceability. The part family is obsolete; no current authorized-distributor stock and complete tier-price ladder for this exact non-plus code were verified. LCDChip's existing stock and price therefore remain unverified catalog values.

Check the exact legacy order-code documentation, manufacturer pin table, current-range resistors, VCC/VEE/VL sequencing, serial timing and top-side EPR thermal design before integration. Missing package artwork, unresolved exact-code availability and unverified live distributor price tiers prevent publication.