Texas Instruments VSP1900DBTR

Overview

VSP1900DBTR from Texas Instruments is a dedicated CCD vertical clock driver with electric-shutter support for digital and video cameras. It integrates eight vertical transfer channels (five 3-state + three 2-state), supports both 2-field and 3-field CCD architectures, operates across VDD = 2.7–5.5 V, VL = –5 to –9 V, and VH = 11.5–15.5 V, and drives capacitive loads up to 1890 pF with selectable series termination (60–240 Ω).

For engineers reviewing the VSP1900DBTR datasheet, VSP1900DBTR pinout, VSP1900DBTR application, or VSP1900DBTR equivalent, this page delivers verified electrical parameters, truth table behavior, level-shifter-based output staging, substrate clock handling, and TSSOP-30 package implementation details critical for CCD timing subsystem design.

Technical Context

The VSP1900DBTR implements dual-stage signal conditioning: input logic-level signals from a CCD timing generator (TG) are translated via on-chip level shifters to high-voltage CCD-compatible outputs (VL, VM, VH rails), then routed through configurable 2-state or 3-state drivers. Its architecture separates vertical transfer (V1–V6, V3A/V3B/V5A/V5B) and substrate clock (SUB) paths with independent enable control.

All eight output channels feature programmable drive strength and noise-controlled switching (tr/tf ≤ 300 ns), with propagation delays (td) ranging 15–100 ns. The device uses three distinct supply domains-digital (VDD), negative bias (VL), and high positive (VH)-and includes internal GND tie points at pins 1, 15, 29, and 30 to minimize ground bounce in multi-rail CCD systems.

Key Specifications

Pinout & Package

TSSOP-30 (DBT) package per JEDEC MO-153; 30-pin plastic small-outline with 0.5 mm pitch, body size 9.80 × 4.40 mm, and four GND pins (1, 15, 29, 30) for low-impedance return path separation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CCD vertical driver applications.

Compared with TDA9981 and VSP2267, the VSP1900DBTR uniquely integrates full three-rail power management (VDD/VL/VH), on-die level shifting, and eight-channel high-voltage output drivers-eliminating external bias circuitry and reducing total solution size by 42% versus discrete alternatives.

Availability

VSP1900DBTR is available at Aetrix Electronics and suitable for digital camera modules, medical endoscopy systems, and industrial machine vision equipment requiring stable component supply, long-lifecycle assurance, and traceable sourcing for Class II medical and CE-compliant products.

Supply support for VSP1900DBTR 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

Texas Instruments is a global semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability signal chain solutions for industrial, automotive, and imaging markets.

The VSP1900DBTR belongs to TI's CCD Timing & Driver product line, engineered specifically for high-fidelity charge-coupled device clocking in portable and professional imaging systems where timing precision, power efficiency, and multi-rail integration are critical.

FAQ

What is the primary function of the VSP1900DBTR in a CCD imaging system?

The VSP1900DBTR serves as a dedicated vertical clock driver that translates logic-level timing signals from a CCD timing generator into high-voltage, multi-level waveforms required to shift charge vertically through CCD pixel registers. It directly controls V1–V6, V3A/V3B/V5A/V5B, and SUB signals, enabling both 2-field and 3-field CCD architectures while integrating level shifting, output driving, and multi-rail power management-all within the VSP1900DBTR IC.

Does the VSP1900DBTR support electric shutter functionality, and how is it implemented?

Yes, the VSP1900DBTR supports electric shutter via its V2, V4, and V6 outputs, which operate as two-level drivers capable of rapid global reset. When triggered, these outputs force simultaneous discharge of vertical registers, halting charge accumulation mid-frame. This function is coordinated with the SUB output to ensure complete substrate depletion-enabling motion-freeze capture without mechanical shutters. The VSP1900DBTR implements this entirely in hardware without external components.

What are the absolute maximum ratings for the VL and VH supplies on the VSP1900DBTR?

The VSP1900DBTR specifies VL (negative supply) absolute maximum rating as GND to –10 V, and VH (high positive supply) absolute maximum as VL + 26 V. For example, with VL = –9 V, VH must not exceed +17 V. Exceeding these limits risks permanent damage to internal level shifter transistors. The recommended operating range remains VL = –5 V to –9 V and VH = 11.5 V to 15.5 V-values rigorously validated in the VSP1900DBTR production test flow.

How does the VSP1900DBTR handle unused readout clock inputs like CH1N–CH5N?

The VSP1900DBTR internally pulls up all CH#N inputs (CH1N–CH5N) to the VH rail, ensuring they remain at a defined logic-high state when unconnected or inactive. This prevents floating inputs from inducing spurious switching in associated readout circuitry and eliminates the need for external pull-up resistors-a design feature confirmed in the functional block diagram and truth table of the VSP1900DBTR datasheet.

Can the VSP1900DBTR be used with CCDs requiring >1890 pF load capacitance?

No-the VSP1900DBTR is characterized and guaranteed for loads from 450 pF to 1890 pF with series termination of 60 Ω to 240 Ω. Driving beyond 1890 pF violates the specified switching performance (e.g., rise/fall times degrade beyond 300 ns, propagation delay spreads exceed 100 ns), risking incomplete charge transfer and image artifacts. For higher-capacitance CCDs, TI recommends verifying compatibility via the VSP1900DBTR loading diagram and consulting the application note SLOA076 before committing to design-in.